Alerts Issued in January 2018


Space Weather Message Code: WARK04
Serial Number: 3406
Issue Time: 2018 Jan 20 0529 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Jan 20 0530 UTC
Valid To: 2018 Jan 20 1500 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: 3405
Issue Time: 2018 Jan 15 0855 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3404
Valid From: 2018 Jan 15 0105 UTC
Now Valid Until: 2018 Jan 15 1500 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: 2030
Issue Time: 2018 Jan 15 0245 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Jan 15 0245 UTC
Synoptic Period: 0000-0300 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: 3404
Issue Time: 2018 Jan 15 0103 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Jan 15 0105 UTC
Valid To: 2018 Jan 15 0900 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: ALTK05
Serial Number: 1205
Issue Time: 2018 Jan 14 0300 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2018 Jan 14 0259 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: 1448
Issue Time: 2018 Jan 14 0206 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2018 Jan 14 0210 UTC
Valid To: 2018 Jan 14 0900 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: 2029
Issue Time: 2018 Jan 14 0116 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Jan 14 0115 UTC
Synoptic Period: 0000-0300 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: 3403
Issue Time: 2018 Jan 13 1815 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Jan 13 1815 UTC
Valid To: 2018 Jan 14 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: ALTK04
Serial Number: 2028
Issue Time: 2018 Jan 09 0302 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Jan 09 0259 UTC
Synoptic Period: 0000-0300 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: 3402
Issue Time: 2018 Jan 09 0153 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Jan 09 0153 UTC
Valid To: 2018 Jan 09 1500 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: 2027
Issue Time: 2018 Jan 08 1440 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Jan 08 1431 UTC
Synoptic Period: 1200-1500 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: 3401
Issue Time: 2018 Jan 08 1319 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Jan 08 1318 UTC
Valid To: 2018 Jan 08 1918 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: 3400
Issue Time: 2018 Jan 01 0501 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3399
Valid From: 2017 Dec 31 2010 UTC
Now Valid Until: 2018 Jan 01 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: ALTK04
Serial Number: 2026
Issue Time: 2018 Jan 01 0411 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Jan 01 0410 UTC
Synoptic Period: 0300-0600 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.