Viewing archive of Monday, 25 February 2002

Solar activity report

Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2002 Feb 25 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 056 Issued at 2200Z on 25 Feb 2002

IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z

Solar activity was moderate due to an M1 flare which occurred at 25/0257 UTC. No flare reports were received but SOHO images suggest that Region 9830 (S18W79) was the source. This region also produced several C-class subflares throughout the past day. It remains the largest sunspot group on the disk but is rapidly decaying. Regions 9842 (S19W36) and 9846 (S04W53) are growing. Region 9846 also produced several C-class subflares. New Regions 9848 (S20E33) and 9849 (N23E69) were numbered.
IB. Solar Activity Forecast
Solar activity is expected to be low to moderate. Region 9830 appears capable of an additional M-class flare before it rotates around the west limb.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet to unsettled.
III. Event Probabilities 26 Feb to 28 Feb
Class M50%50%50%
Class X10%10%10%
Proton05%05%05%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       25 Feb 211
  Predicted   26 Feb-28 Feb  215/220/220
  90 Day Mean        25 Feb 223
V. Geomagnetic A Indices
  Observed Afr/Ap 24 Feb  004/004
  Estimated     Afr/Ap 25 Feb  007/005
  Predicted    Afr/Ap 26 Feb-28 Feb  007/005-007/007-010/010
VI. Geomagnetic Activity Probabilities 26 Feb to 28 Feb
A. Middle Latitudes
Active15%15%15%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active20%20%20%
Minor storm05%05%05%
Major-severe storm01%01%01%

All times in UTC

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Current data suggests there is a moderate possibility for aurora to appear at the following high latitude regions in the near future

Gillam, MB, Whitehorse, YT, Yellowknife, NT
Fairbanks, AK

Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future

Edmonton, AB, Saskatoon, SK
Anchorage, AK, Juneau, AK

Current data suggests there is a slight possibility for aurora to appear at the following middle latitude regions in the near future

Calgary, AB
The direction of the interplanetary magnetic field is slightly South (-5.78nT).

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