Viewing archive of Monday, 4 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 04 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 035 Issued at 2200Z on 04 Feb 2002

IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z

Solar activity was at moderate levels. Region 9809 (S06E16) produced two M-class flares during the period. The largest was an M2 x-ray flare at 04/0602 UTC, an M1 followed shortly thereafter, at 04/0658 UTC. Both of these flares were optically correlated using SOHO/EIT and Culgoora Solar Observatory data. Region 9802 (S14W44) produced a C7/Sf flare at 04/1909 UTC along with several other smaller C-class flares throughout the period. This region also grew in penumbral coverage since yesterday and is an Fki beta-gamma-delta complex. Region 9800 (N10W73) has continued to decay as it nears the west limb. Numerous minor and significant Type III radio sweeps were observed today. Newly numbered Region 9816 (S13W33) is showing rapid growth in spot areal coverage and produced a Sf flare at 04/0438 UTC.
IB. Solar Activity Forecast
Solar activity is expected to be at low to moderate levels. Region 9802 may yet produce an isolated major flare before exiting the west limb.
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
The geomagnetic field activity was at quiet to unsettled levels.
IIB. Geophysical Activity Forecast
The geomagnetic field activity is expected to be at quiet to unsettled levels for day one of the forecast. Active conditions may be expected due to the effects of a large transequatorial coronal hole for days two and three of the forecast. Additionally, a slight chance of isolated minor storm levels could occur at higher latitudes.
III. Event Probabilities 05 Feb to 07 Feb
Class M60%60%50%
Class X10%10%05%
Proton05%05%05%
PCAFyellow
IV. Penticton 10.7 cm Flux
  Observed       04 Feb 235
  Predicted   05 Feb-07 Feb  230/225/215
  90 Day Mean        04 Feb 225
V. Geomagnetic A Indices
  Observed Afr/Ap 03 Feb  006/005
  Estimated     Afr/Ap 04 Feb  004/004
  Predicted    Afr/Ap 05 Feb-07 Feb  005/005-010/015-014/020
VI. Geomagnetic Activity Probabilities 05 Feb to 07 Feb
A. Middle Latitudes
Active15%20%30%
Minor storm05%10%10%
Major-severe storm01%01%01%
B. High Latitudes
Active15%30%40%
Minor storm05%15%15%
Major-severe storm01%05%05%

All times in UTC

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