NOAA / Space Weather Prediction Center

SWPC Space Weather Alerts
Home Alerts Archive Help

Geomagnetic and Solar Indices -- Updated Apr 23 2134 UTC
Geomagnetic Indices
Station April 22
3-hour K-indices
A-index April 23
3-hour K-indices
Running
A-index
  00-03 03-06 06-09 09-12 12-15 15-18 18-21 21-24   00-03 03-06 06-09 09-12 12-15 15-18 18-21 21-24  
Fredericksburg 6 5 4 4 5 4 3 4 37 4 4 4 4 4 3 3 * 24
Boulder 6 6 5 6 5 4 3 4 51 4 5 5 5 4 4 3 * 33
College 4 6 7 8 6 6 3 4 86 4 3 8 6 6 6 4 * 72
Planetary 5 6 5 5 6 5 4 6 54 4 4 6 5 5 5 4 * 46

Solar Radio Flux
Apr 23
Station / CMP
245 410 610 1415 2695 4995 8800 15400
Learmonth / 0500 UTC * * * 60 90 104 213 497
San Vito / 1200 UTC 16 33 * 58 81 122 247 527
Sagamore Hill / 1700 UTC 12 31 43 58 79 118 248 540
Palehua / 2300 UTC * * * * * * * *
Penticton 10.7cm (2800 MHz) Morning     84 Noon     83 Afternoon     *

CMP = Central Meridian Passage, time of measurement near local noon


Daily Solar Indices
  Penticton 10.7cm Solar Radio Flux (2800 MHz) GOES X-ray
  Morning 1800 UTC Noon 2000 UTC Afternoon 2200 UTC 90 Day Mean background flux
Apr 22 83 84 83 78 B1.0

  SWO Sunspot
Number
Sunspot Area
10E-6 Hemis.
New Regions Spotted Regions X-ray Events
C / M / X
Optical Flares
S / 1 / 2 / 3 / 4
Radio Bursts
10 cm tenflares
Radio Sweeps
Type II / IV
Apr 23 43 260 0 3 0/0/0 0/0/0/0/0 0 0/0
Apr 22 29 240 0 2 0/0/0 2/0/0/0/0 0 0/0

Related online data
Daily Geomagnetic Indices last 30 days current quarter since 1994
Daily Solar Indices last 30 days current quarter since 1994
Available A and K indices last 2 days last 7 days last 2 years
Noon Solar Radio Flux Values last 2 days last 7 days last 45 days
Solar Event Reports Today or Yesterday last 60 days last 3 years
Radio Burst Event Reports last 45 days    

This page updates automatically every 5 minutes.

Return to Space Weather Alerts