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Geomagnetic and Solar Indices -- Updated Apr 18 1543 UTC
Geomagnetic Indices
Station April 17
3-hour K-indices
A-index April 18
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 3 3 2 2 3 3 2 2 11 1 2 1 2 2 * * * 7
Boulder 3 3 2 1 3 4 2 2 12 1 2 1 2 2 * * * 9
College 3 2 1 2 4 5 2 1 15 2 3 0 2 1 * * * 11
Planetary 3 3 2 2 2 3 2 1 11 2 2 1 2 2 * * * 9

Solar Radio Flux
Apr 18
Station / CMP
245 410 610 1415 2695 4995 8800 15400
Learmonth / 0500 UTC 23 49 80 138 168 214 293 568
San Vito / 1200 UTC 24 50 * 143 170 217 308 523
Sagamore Hill / 1700 UTC * * * * * * * *
Palehua / 2300 UTC * * * * * * * *
Penticton 10.7cm (2800 MHz) Morning     * Noon     * 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 17 179 179 190 155 B8.1

  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 18 263 1840 0 10 2/0/0 3/0/0/0/0 0 0/0
Apr 17 296 1660 1 12 8/0/0 5/0/0/0/0 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    

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