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Alerts Issued in December 2014


Space Weather Message Code: ALTEF3
Serial Number: 2148
Issue Time: 2014 Dec 31 1402 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2014 Dec 31 1355 UTC
Station: GOES-13
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: WARK04
Serial Number: 2424
Issue Time: 2014 Dec 30 2155 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2423
Valid From: 2014 Dec 28 1945 UTC
Now Valid Until: 2014 Dec 31 0600 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2423
Issue Time: 2014 Dec 30 0541 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2422
Valid From: 2014 Dec 28 1945 UTC
Now Valid Until: 2014 Dec 30 2200 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTTP4
Serial Number: 490
Issue Time: 2014 Dec 30 0120 UTC

ALERT: Type IV Radio Emission
Begin Time: 2014 Dec 30 0052 UTC
www.swpc.noaa.gov/noaa-scales-explanation
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.


Space Weather Message Code: ALTTP2
Serial Number: 991
Issue Time: 2014 Dec 30 0120 UTC

ALERT: Type II Radio Emission
Begin Time: 2014 Dec 30 0047 UTC
Estimated Velocity: 415 km/s
www.swpc.noaa.gov/noaa-scales-explanation
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: WARK04
Serial Number: 2422
Issue Time: 2014 Dec 29 2240 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2421
Valid From: 2014 Dec 28 1945 UTC
Now Valid Until: 2014 Dec 30 0600 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK05
Serial Number: 948
Issue Time: 2014 Dec 29 2240 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 947
Valid From: 2014 Dec 29 1710 UTC
Now Valid Until: 2014 Dec 30 0300 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WATA20
Serial Number: 594
Issue Time: 2014 Dec 29 2240 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Dec 30: G1 (Minor) Dec 31: None (Below G1) Jan 01: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: ALTK05
Serial Number: 763
Issue Time: 2014 Dec 29 1718 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2014 Dec 29 1718 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK05
Serial Number: 947
Issue Time: 2014 Dec 29 1710 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2014 Dec 29 1710 UTC
Valid To: 2014 Dec 29 2300 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK04
Serial Number: 2421
Issue Time: 2014 Dec 29 1248 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2420
Valid From: 2014 Dec 28 1945 UTC
Now Valid Until: 2014 Dec 30 0100 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTK04
Serial Number: 1752
Issue Time: 2014 Dec 28 2001 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Dec 28 2000 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2420
Issue Time: 2014 Dec 28 1945 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Dec 28 1945 UTC
Valid To: 2014 Dec 29 1400 UTC
Warning Condition: Onset
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTK04
Serial Number: 1751
Issue Time: 2014 Dec 26 2000 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Dec 26 2000 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2419
Issue Time: 2014 Dec 26 1916 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Dec 26 1915 UTC
Valid To: 2014 Dec 27 1400 UTC
Warning Condition: Onset
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2418
Issue Time: 2014 Dec 25 2319 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2417
Valid From: 2014 Dec 25 1612 UTC
Now Valid Until: 2014 Dec 26 1400 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTK04
Serial Number: 1750
Issue Time: 2014 Dec 25 2105 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Dec 25 2100 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2417
Issue Time: 2014 Dec 25 1612 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Dec 25 1612 UTC
Valid To: 2014 Dec 26 0100 UTC
Warning Condition: Onset
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2416
Issue Time: 2014 Dec 24 1739 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2415
Valid From: 2014 Dec 21 1840 UTC
Now Valid Until: 2014 Dec 25 0700 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK05
Serial Number: 946
Issue Time: 2014 Dec 24 0655 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 945
Valid From: 2014 Dec 22 1630 UTC
Now Valid Until: 2014 Dec 24 1500 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK04
Serial Number: 2415
Issue Time: 2014 Dec 24 0651 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2414
Valid From: 2014 Dec 21 1840 UTC
Now Valid Until: 2014 Dec 24 1800 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK05
Serial Number: 945
Issue Time: 2014 Dec 23 2255 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 944
Valid From: 2014 Dec 22 1630 UTC
Now Valid Until: 2014 Dec 24 0700 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WATA20
Serial Number: 593
Issue Time: 2014 Dec 23 2043 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Dec 24: G1 (Minor) Dec 25: None (Below G1) Dec 26: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK05
Serial Number: 944
Issue Time: 2014 Dec 23 1312 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 943
Valid From: 2014 Dec 22 1630 UTC
Now Valid Until: 2014 Dec 23 2300 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK04
Serial Number: 2414
Issue Time: 2014 Dec 23 1312 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2413
Valid From: 2014 Dec 21 1840 UTC
Now Valid Until: 2014 Dec 24 0700 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: SUMSUD
Serial Number: 201
Issue Time: 2014 Dec 23 1225 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2014 Dec 23 1117 UTC
Deviation: 42 nT
Station: Fredericksburg
www.swpc.noaa.gov/noaa-scales-explanation


Space Weather Message Code: ALTK04
Serial Number: 1749
Issue Time: 2014 Dec 23 1134 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Dec 23 1134 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARPX1
Serial Number: 441
Issue Time: 2014 Dec 23 1124 UTC

WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2014 Dec 23 1124 UTC
Valid To: 2014 Dec 23 2100 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.


Space Weather Message Code: WARK06
Serial Number: 248
Issue Time: 2014 Dec 23 1101 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2014 Dec 23 1101 UTC
Valid To: 2014 Dec 23 1700 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.


Space Weather Message Code: WARSUD
Serial Number: 158
Issue Time: 2014 Dec 23 1045 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2014 Dec 23 1100 UTC
Valid To: 2014 Dec 23 1140 UTC
IP Shock Passage Observed: 2014 Dec 23 1036 UTC
www.swpc.noaa.gov/noaa-scales-explanation


Space Weather Message Code: WARK04
Serial Number: 2413
Issue Time: 2014 Dec 22 2256 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2412
Valid From: 2014 Dec 21 1840 UTC
Now Valid Until: 2014 Dec 23 1400 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK05
Serial Number: 943
Issue Time: 2014 Dec 22 2255 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 942
Valid From: 2014 Dec 22 1630 UTC
Now Valid Until: 2014 Dec 23 1400 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WATA20
Serial Number: 592
Issue Time: 2014 Dec 22 2120 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Dec 23: G1 (Minor) Dec 24: None (Below G1) Dec 25: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK05
Serial Number: 942
Issue Time: 2014 Dec 22 1630 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2014 Dec 22 1630 UTC
Valid To: 2014 Dec 22 2300 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: ALTK05
Serial Number: 762
Issue Time: 2014 Dec 22 0245 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2014 Dec 22 0245 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK05
Serial Number: 941
Issue Time: 2014 Dec 22 0228 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2014 Dec 22 0230 UTC
Valid To: 2014 Dec 22 1300 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: ALTK04
Serial Number: 1748
Issue Time: 2014 Dec 21 2035 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Dec 21 2035 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: SUMSUD
Serial Number: 200
Issue Time: 2014 Dec 21 1924 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2014 Dec 21 1916 UTC
Deviation: 10 nT
Station: FRD
www.swpc.noaa.gov/noaa-scales-explanation


Space Weather Message Code: WARK04
Serial Number: 2412
Issue Time: 2014 Dec 21 1841 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Dec 21 1840 UTC
Valid To: 2014 Dec 23 0100 UTC
Warning Condition: Onset
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2411
Issue Time: 2014 Dec 21 1840 UTC

CANCEL WARNING: Geomagnetic K-index of 4 expected
Cancel Serial Number: 2410
Original Issue Time: 2014 Dec 21 1432 UTC

Comment: This cancels the extension (incorrect end time) - the original K-index of 4 warning remains in effect until 22/1900 UTC.
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2410
Issue Time: 2014 Dec 21 1833 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2409
Valid From: 2014 Dec 21 1431 UTC
Now Valid Until: 2014 Dec 22 1300 UTC
Warning Condition: Onset
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARSUD
Serial Number: 157
Issue Time: 2014 Dec 21 1833 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2014 Dec 21 1848 UTC
Valid To: 2014 Dec 21 1948 UTC
IP Shock Passage Observed: 2014 Dec 21 1824 UTC
www.swpc.noaa.gov/noaa-scales-explanation


Space Weather Message Code: WARK04
Serial Number: 2409
Issue Time: 2014 Dec 21 1432 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Dec 21 1431 UTC
Valid To: 2014 Dec 22 1900 UTC
Warning Condition: Onset
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: SUM10R
Serial Number: 652
Issue Time: 2014 Dec 20 0238 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2014 Dec 20 0018 UTC
Maximum Time: 2014 Dec 20 0024 UTC
End Time: 2014 Dec 20 0100 UTC
Duration: 52 minutes
Peak Flux: 2300 sfu
Latest Penticton Noon Flux: 216 sfu
www.swpc.noaa.gov/noaa-scales-explanation
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.


Space Weather Message Code: ALTTP2
Serial Number: 990
Issue Time: 2014 Dec 20 0150 UTC

ALERT: Type II Radio Emission
Begin Time: 2014 Dec 20 0050 UTC
Estimated Velocity: 900 km/s
www.swpc.noaa.gov/noaa-scales-explanation
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: SUMX01
Serial Number: 111
Issue Time: 2014 Dec 20 0100 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2014 Dec 20 0011 UTC
Maximum Time: 2014 Dec 20 0028 UTC
End Time: 2014 Dec 20 0055 UTC
X-ray Class: X1.8
Optical Class: 2b
Location: S19W29
NOAA Scale: R3 - Strong

Comment: NOAA Active Region 12242; optical class is preliminary
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.


Space Weather Message Code: ALTXMF
Serial Number: 247
Issue Time: 2014 Dec 20 0022 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2014 Dec 20 0020 UTC
NOAA Scale: R2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.


Space Weather Message Code: WATA30
Serial Number: 118
Issue Time: 2014 Dec 19 1315 UTC

WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
Dec 20: G1 (Minor) Dec 21: G2 (Moderate) Dec 22: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.


Space Weather Message Code: ALTTP2
Serial Number: 989
Issue Time: 2014 Dec 18 2258 UTC

ALERT: Type II Radio Emission
Begin Time: 2014 Dec 18 2222 UTC
Estimated Velocity: 664 km/s
www.swpc.noaa.gov/noaa-scales-explanation
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: SUMXM5
Serial Number: 132
Issue Time: 2014 Dec 18 2242 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2014 Dec 18 2141 UTC
Maximum Time: 2014 Dec 18 2158 UTC
End Time: 2014 Dec 18 2225 UTC
X-ray Class: M6.9
Optical Class: 2n
Location: S11E10
NOAA Scale: R2 - Moderate

Comment: Optical class is preliminary.
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.


Space Weather Message Code: SUM10R
Serial Number: 651
Issue Time: 2014 Dec 18 2227 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2014 Dec 18 2150 UTC
Maximum Time: 2014 Dec 18 2156 UTC
End Time: 2014 Dec 18 2204 UTC
Duration: 14 minutes
Peak Flux: 240 sfu
Latest Penticton Noon Flux: 213 sfu
www.swpc.noaa.gov/noaa-scales-explanation
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.


Space Weather Message Code: ALTXMF
Serial Number: 246
Issue Time: 2014 Dec 18 2157 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2014 Dec 18 2155 UTC
NOAA Scale: R2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.


Space Weather Message Code: ALTTP2
Serial Number: 988
Issue Time: 2014 Dec 17 0550 UTC

ALERT: Type II Radio Emission
Begin Time: 2014 Dec 17 0449 UTC
Estimated Velocity: 910 km/s
www.swpc.noaa.gov/noaa-scales-explanation
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: SUMXM5
Serial Number: 131
Issue Time: 2014 Dec 17 0542 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2014 Dec 17 0425 UTC
Maximum Time: 2014 Dec 17 0451 UTC
End Time: 2014 Dec 17 0520 UTC
X-ray Class: M8.7
Optical Class: 2b
Location: S19E09
NOAA Scale: R2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.


Space Weather Message Code: ALTTP4
Serial Number: 489
Issue Time: 2014 Dec 17 0538 UTC

ALERT: Type IV Radio Emission
Begin Time: 2014 Dec 17 0454 UTC
www.swpc.noaa.gov/noaa-scales-explanation
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.


Space Weather Message Code: SUM10R
Serial Number: 650
Issue Time: 2014 Dec 17 0454 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2014 Dec 17 0431 UTC
Maximum Time: 2014 Dec 17 0434 UTC
End Time: 2014 Dec 17 0438 UTC
Duration: 7 minutes
Peak Flux: 320 sfu
Latest Penticton Noon Flux: 185 sfu
www.swpc.noaa.gov/noaa-scales-explanation
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.


Space Weather Message Code: ALTXMF
Serial Number: 245
Issue Time: 2014 Dec 17 0439 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2014 Dec 17 0438 UTC
NOAA Scale: R2 - Moderate
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.


Space Weather Message Code: WARK04
Serial Number: 2408
Issue Time: 2014 Dec 15 2334 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Dec 15 2333 UTC
Valid To: 2014 Dec 16 1200 UTC
Warning Condition: Onset
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTEF3
Serial Number: 2147
Issue Time: 2014 Dec 15 1431 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2014 Dec 15 1430 UTC
Station: GOES13
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: WARK04
Serial Number: 2407
Issue Time: 2014 Dec 15 1324 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2406
Valid From: 2014 Dec 14 1700 UTC
Now Valid Until: 2014 Dec 15 2100 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTTP2
Serial Number: 987
Issue Time: 2014 Dec 14 1959 UTC

ALERT: Type II Radio Emission
Begin Time: 2014 Dec 14 1929 UTC
Estimated Velocity: 1028 km/s

Comment: Associated with an M1 flare from Region 2242 (S19E43).
www.swpc.noaa.gov/noaa-scales-explanation
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: WARK04
Serial Number: 2406
Issue Time: 2014 Dec 14 1701 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Dec 14 1700 UTC
Valid To: 2014 Dec 15 1400 UTC
Warning Condition: Onset
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTTP2
Serial Number: 986
Issue Time: 2014 Dec 14 0139 UTC

ALERT: Type II Radio Emission
Begin Time: 2014 Dec 13 2157 UTC
Estimated Velocity: 767 km/s
www.swpc.noaa.gov/noaa-scales-explanation
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: WARK04
Serial Number: 2405
Issue Time: 2014 Dec 12 1858 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2404
Valid From: 2014 Dec 12 0832 UTC
Now Valid Until: 2014 Dec 13 1900 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK05
Serial Number: 940
Issue Time: 2014 Dec 12 1858 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 939
Valid From: 2014 Dec 12 1304 UTC
Now Valid Until: 2014 Dec 13 1300 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: ALTEF3
Serial Number: 2146
Issue Time: 2014 Dec 12 1344 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2145
Begin Time: 2014 Dec 07 0231 UTC
Yesterday Maximum 2MeV Flux: 4934 pfu
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTK05
Serial Number: 761
Issue Time: 2014 Dec 12 1310 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2014 Dec 12 1310 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK05
Serial Number: 939
Issue Time: 2014 Dec 12 1304 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2014 Dec 12 1304 UTC
Valid To: 2014 Dec 12 1900 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK04
Serial Number: 2404
Issue Time: 2014 Dec 12 1303 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2403
Valid From: 2014 Dec 12 0832 UTC
Now Valid Until: 2014 Dec 12 2300 UTC
Warning Condition: Persistence
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTK04
Serial Number: 1747
Issue Time: 2014 Dec 12 0900 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Dec 12 0859 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2403
Issue Time: 2014 Dec 12 0832 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Dec 12 0832 UTC
Valid To: 2014 Dec 12 1800 UTC
Warning Condition: Onset
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTEF3
Serial Number: 2145
Issue Time: 2014 Dec 11 1021 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2144
Begin Time: 2014 Dec 07 0231 UTC
Yesterday Maximum 2MeV Flux: 2141 pfu
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTEF3
Serial Number: 2144
Issue Time: 2014 Dec 10 1126 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2143
Begin Time: 2014 Dec 07 0231 UTC
Yesterday Maximum 2MeV Flux: 5720 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: WARK04
Serial Number: 2402
Issue Time: 2014 Dec 10 0655 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2401
Valid From: 2014 Dec 09 1922 UTC
Now Valid Until: 2014 Dec 10 1300 UTC
Warning Condition: persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTK04
Serial Number: 1746
Issue Time: 2014 Dec 09 1958 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Dec 09 1957 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2401
Issue Time: 2014 Dec 09 1923 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Dec 09 1922 UTC
Valid To: 2014 Dec 10 0700 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTEF3
Serial Number: 2143
Issue Time: 2014 Dec 09 1211 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2142
Begin Time: 2014 Dec 07 0231 UTC
Yesterday Maximum 2MeV Flux: 9964 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: WARK04
Serial Number: 2400
Issue Time: 2014 Dec 09 0655 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2399
Valid From: 2014 Dec 06 1020 UTC
Now Valid Until: 2014 Dec 09 1900 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2399
Issue Time: 2014 Dec 08 1753 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2398
Valid From: 2014 Dec 06 1020 UTC
Now Valid Until: 2014 Dec 09 0700 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK05
Serial Number: 938
Issue Time: 2014 Dec 08 1753 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2014 Dec 08 1751 UTC
Valid To: 2014 Dec 08 2300 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: ALTEF3
Serial Number: 2142
Issue Time: 2014 Dec 08 1000 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2141
Begin Time: 2014 Dec 07 0231 UTC
Yesterday Maximum 2MeV Flux: 2029 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: SUM10R
Serial Number: 649
Issue Time: 2014 Dec 08 0056 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2014 Dec 08 0037 UTC
Maximum Time: 2014 Dec 08 0038 UTC
End Time: 2014 Dec 08 0038 UTC
Duration: 1 minutes
Peak Flux: 220 sfu
Latest Penticton Noon Flux: 132 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.


Space Weather Message Code: WARK05
Serial Number: 937
Issue Time: 2014 Dec 07 2110 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 936
Valid From: 2014 Dec 07 1344 UTC
Now Valid Until: 2014 Dec 08 0400 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WATA20
Serial Number: 591
Issue Time: 2014 Dec 07 2110 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Dec 08: G1 (Minor) Dec 09: None (Below G1) Dec 10: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: ALTEF3
Serial Number: 2141
Issue Time: 2014 Dec 07 1431 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2014 Dec 07 0231 UTC
Station: GOES13
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.


Space Weather Message Code: ALTK05
Serial Number: 760
Issue Time: 2014 Dec 07 1408 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2014 Dec 07 1406 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: ALTK05
Serial Number: 759
Issue Time: 2014 Dec 07 1407 UTC

CANCEL ALERT: Geomagnetic K-index of 5
Cancel Serial Number: 758
Original Issue Time: 2014 Dec 07 1406 UTC

Comment: Incorrect start time
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: ALTK05
Serial Number: 758
Issue Time: 2014 Dec 07 1406 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2014 Dec 07 0206 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK05
Serial Number: 936
Issue Time: 2014 Dec 07 1343 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2014 Dec 07 1344 UTC
Valid To: 2014 Dec 07 2200 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK04
Serial Number: 2398
Issue Time: 2014 Dec 07 1148 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2397
Valid From: 2014 Dec 06 1020 UTC
Now Valid Until: 2014 Dec 08 1900 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTK05
Serial Number: 757
Issue Time: 2014 Dec 07 0125 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2014 Dec 07 0124 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: WARK05
Serial Number: 935
Issue Time: 2014 Dec 07 0104 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2014 Dec 07 0102 UTC
Valid To: 2014 Dec 07 1000 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.


Space Weather Message Code: ALTK04
Serial Number: 1745
Issue Time: 2014 Dec 06 2007 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Dec 06 2007 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2397
Issue Time: 2014 Dec 06 1819 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2396
Valid From: 2014 Dec 06 1020 UTC
Now Valid Until: 2014 Dec 07 1300 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2396
Issue Time: 2014 Dec 06 1020 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Dec 06 1020 UTC
Valid To: 2014 Dec 06 1900 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTTP4
Serial Number: 488
Issue Time: 2014 Dec 05 0640 UTC

ALERT: Type IV Radio Emission
Begin Time: 2014 Dec 05 0623 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.


Space Weather Message Code: ALTTP2
Serial Number: 985
Issue Time: 2014 Dec 05 0639 UTC

ALERT: Type II Radio Emission
Begin Time: 2014 Dec 05 0601 UTC
Estimated Velocity: 810 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.


Space Weather Message Code: ALTK04
Serial Number: 1744
Issue Time: 2014 Dec 04 2320 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Dec 04 2319 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2395
Issue Time: 2014 Dec 04 2106 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Dec 04 2130 UTC
Valid To: 2014 Dec 05 1300 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: SUMXM5
Serial Number: 130
Issue Time: 2014 Dec 04 1902 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2014 Dec 04 1805 UTC
Maximum Time: 2014 Dec 04 1825 UTC
End Time: 2014 Dec 04 1856 UTC
X-ray Class: M6.1
Location: S20W31
NOAA Scale: R2 - Moderate
Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.


Space Weather Message Code: ALTXMF
Serial Number: 244
Issue Time: 2014 Dec 04 1825 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2014 Dec 04 1821 UTC
NOAA Scale: R2 - Moderate
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/drap.


Space Weather Message Code: WARK04
Serial Number: 2394
Issue Time: 2014 Dec 04 1624 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Dec 04 1625 UTC
Valid To: 2014 Dec 04 1900 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: ALTK04
Serial Number: 1743
Issue Time: 2014 Dec 01 2158 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2014 Dec 01 2156 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: WARK04
Serial Number: 2393
Issue Time: 2014 Dec 01 2157 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2014 Dec 01 2155 UTC
Valid To: 2014 Dec 02 0700 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.


Space Weather Message Code: SUM10R
Serial Number: 648
Issue Time: 2014 Dec 01 0727 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2014 Dec 01 0630 UTC
Maximum Time: 2014 Dec 01 0633 UTC
End Time: 2014 Dec 01 0636 UTC
Duration: 6 minutes
Peak Flux: 180 sfu
Latest Penticton Noon Flux: 177 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.