Viewing archive of Friday, 3 May 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 May 03 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 123 Issued at 2200Z on 03 May 2002

IA. Analysis of Solar Active Regions and Activity from 02-2100Z to 03-2100Z

Solar activity was low. The most interesting flare of the past day was a long-duration C6/Sf at 02/2134 UTC in Region 9926 (N15W56). This event was associated with a filament eruption, Type II sweep, and a CME visible in LASCO images that was apparently directed towards the northwest. CME material was also seen directed towards the southeast but preliminary analysis suggests that this may be related to a separate event, possibly from beyond the east limb. Region 9934 (S17E48) remains the largest and most complex sunspot group on the disk and is currently a moderately-large E-type group with a delta configuration in the leader spot complex. This region has produced flares during the past day but none of them have had significant x-ray output. New Regions 9937 (S09E68) and 9938 (S04E72) are rotating onto the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low to moderate. C-class flares are expected to continue from a number of sunspot groups. Region 9934 remains the most likely source of M-class activity.
IIA. Geophysical Activity Summary 02-2100Z to 03-2100Z
The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet to unsettled. Enhanced activity levels are possible on 05-06 May but a significant disturbance from the LDE/CME discussed in Part IA is not expected.
III. Event Probabilities 04 May to 06 May
Class M30%40%50%
Class X01%05%05%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       03 May 179
  Predicted   04 May-06 May  185/190/195
  90 Day Mean        03 May 189
V. Geomagnetic A Indices
  Observed Afr/Ap 02 May  004/007
  Estimated     Afr/Ap 03 May  005/007
  Predicted    Afr/Ap 04 May-06 May  005/007-010/010-010/010
VI. Geomagnetic Activity Probabilities 04 May to 06 May
A. Middle Latitudes
Active15%25%25%
Minor storm05%10%10%
Major-severe storm01%01%01%
B. High Latitudes
Active25%30%30%
Minor storm10%15%15%
Major-severe storm05%10%10%

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