Viewing archive of Saturday, 4 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 04 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 124 Issued at 2200Z on 04 May 2002IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z Solar activity was at low levels. Region 9937 (S10E56)
produced a C9/Sf flare at 04/1338 UTC. Region 9934 (S17E35) has
remained relatively unchanged. It continues to be the most complex
region on the disk with a beta-gamma-delta magnetic configuration in
the leader spot. Region 9929 (N21W41) has shown the most change,
increasing in area, extent and spot count. Two new regions were
numbered today: Region 9939 (N16E67) and Region 9940 (N14E72).
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate. Region 9934 has the potential for M-class events.
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
The geomagnetic field was at quiet levels with one period of
unsettled conditions (6-9 UTC) observed on the USGS Boulder
magnetometer.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to unsettled levels. The CME from a long
duration C6 event on 2 May is expected to arrive late on the first
day of the forecast period but no significant activity is expected.
III. Event Probabilities 05 May to 07 May
| Class M | 35% | 35% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 04 May 190 Predicted 05 May-07 May 200/210/210 90 Day Mean 04 May 189
V. Geomagnetic A Indices
Observed Afr/Ap 03 May 004/007 Estimated Afr/Ap 04 May 006/007 Predicted Afr/Ap 05 May-07 May 010/010-010/010-008/008
VI. Geomagnetic Activity Probabilities 05 May to 07 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 20% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 20% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 10% | 10% | 05% |
All times in UTC
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