NOAA / Space Weather Prediction Center

SWPC Space Weather Alerts
Home Alerts Archive Help

Geomagnetic and Solar Indices -- Updated May 19 2358 UTC
Geomagnetic Indices
Station May 18
3-hour K-indices		 A-index May 19
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 4 5 3 2 2 2 2 2 16 3 2 2 2 2 2 2 * 8
Boulder 4 5 5 3 2 3 2 2 21 3 2 3 2 3 3 1 * 10
College 5 6 4 5 3 2 2 2 30 3 2 5 4 5 6 2 * 30
Planetary 5 5 4 3 2 2 3 2 21 4 2 3 2 2 3 2 * 11
Solar Radio Flux
May 19
Station / CMP		 245 410 610 1415 2695 4995 8800 15400
Learmonth / 0500 UTC 24 40 71 112 135 173 302 587
San Vito / 1200 UTC 21 56 * 121 134 186 280 552
Sagamore Hill / 1700 UTC 19 41 66 111 124 166 306 577
Palehua / 2300 UTC 21 43 61 113 136 179 297 586
Penticton 10.7cm (2800 MHz) Morning     133 Noon     135 Afternoon     136

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
May 18 132 132 133 121 B4.8

  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
May 19 113 590 0 6 9/0/0 12/1/0/0/0 0 0/0
May 18 146 700 0 9 5/0/0 10/0/0/0/0 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