Viewing archive of Thursday, 6 September 2001
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 2001 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 2001IA. Analysis of Solar Active Regions and Activity from 05-2100Z to 06-2100Z Solar activity was moderate. An M2/Sf flare occurred in
Region 9608 (S26E56) at 05/2233 UTC. The next largest flare of the
past day was a C8 at 06/0346 UTC. Although no optical flare reports
were received, observations from the SOHO spacecraft suggest that
Region 9601 (N11W51) was the source. Regions 9605 (S18E12), 9607
(S15E42), and new Region 9610 (S10E71) also produced C-class
subflares. Regions 9601 and 9608 remain the largest and most
magnetically complex sunspot groups. New Region 9609 (S07W53) was
also numbered.
IB. Solar Activity Forecast
Solar activity is expected to be
moderate to high. Additional M-class flares are likely with Regions
9601 and 9608 the most probable producers. A chance of an isolated
major flare in these areas also exists.
IIA. Geophysical Activity Summary 05-2100Z to 06-2100Z
The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled.
III. Event Probabilities 07 Sep to 09 Sep
| Class M | 75% | 75% | 75% |
| Class X | 15% | 15% | 15% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 06 Sep 222 Predicted 07 Sep-09 Sep 225/230/230 90 Day Mean 06 Sep 159
V. Geomagnetic A Indices
Observed Afr/Ap 05 Sep 006/010 Estimated Afr/Ap 06 Sep 008/008 Predicted Afr/Ap 07 Sep-09 Sep 008/010-008/010-008/010
VI. Geomagnetic Activity Probabilities 07 Sep to 09 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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