Viewing archive of Friday, 6 September 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 Sep 06 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 249 Issued at 2200Z on 06 Sep 2002IA. Analysis of Solar Active Regions and Activity from 05-2100Z to 06-2100Z Solar activity was low. A few C-class flares occurred,
most without corresponding optical reports. Regions 95 (N08W31) and
96 (S16W15) remain the largest sunspot groups on the visible disk.
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate. Regions 95 and 96 could each produce low-level M-class
activity. Old active Region 69 (S08, L=299) is expected to return at
the east limb within the three-day forecast period.
IIA. Geophysical Activity Summary 05-2100Z to 06-2100Z
The geomagnetic field was quiet to unsettled. The greater than 10 MeV
proton flux has been slowly increasing over the past 20 hours,
apparently due to a backside event over the northwest limb. Current
proton flux is about 9 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled for the next 24 hours or so.
Unsettled to active conditions are possible on 8-9 September in
response to yesterday's long-duration C5 flare and eruptive
filament. The greater than 10 MeV proton flux could cross the 10 pfu
event threshold within the next few hours but a large peak event
flux is not expected.
III. Event Probabilities 07 Sep to 09 Sep
| Class M | 40% | 50% | 50% |
| Class X | 01% | 05% | 05% |
| Proton | 10% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 06 Sep 178 Predicted 07 Sep-09 Sep 185/190/200 90 Day Mean 06 Sep 170
V. Geomagnetic A Indices
Observed Afr/Ap 05 Sep 008/010 Estimated Afr/Ap 06 Sep 008/010 Predicted Afr/Ap 07 Sep-09 Sep 008/010-012/015-010/010
VI. Geomagnetic Activity Probabilities 07 Sep to 09 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 25% | 25% |
| Minor storm | 10% | 15% | 15% |
| Major-severe storm | 01% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 35% | 35% |
| Minor storm | 15% | 20% | 20% |
| Major-severe storm | 05% | 05% | 05% |
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