Viewing archive of Sunday, 9 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 09 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 252 Issued at 2200Z on 09 Sep 2001IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z Solar activity was high due to an M9/2N flare at
09/2045 UTC in Region 9608 (S27E18). This flare was quite impulsive
and located in centers south and east of the large trailer spots. An
M3/1N flare occurred at 09/1516 UTC in Region 9607 (S17E03). Region
9607 is at the northwest end of the elongated 9608/9607 sunspot
complex. This area continues to grow in sunspot area and magnetic
complexity. Decaying Region 9601 (N13W93) is rotating out of view
without producing significant flares during the past day.
IB. Solar Activity Forecast
Solar activity is expected to be
moderate to high with M-class flares and possibly another major
flare in the 9607/9608 complex.
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled barring any influence from the
09/2045 UTC major flare discussed in Part IA. This forecast may be
modified after CME information is received from the SOHO spacecraft
later this evening or tomorrow. A solar energetic particle event is
currently not expected from this major flare.
III. Event Probabilities 10 Sep to 12 Sep
| Class M | 90% | 90% | 90% |
| Class X | 15% | 15% | 15% |
| Proton | 10% | 10% | 10% |
| PCAF | yellow | ||
IV. Penticton 10.7 cm Flux
Observed 09 Sep 236 Predicted 10 Sep-12 Sep 230/220/220 90 Day Mean 09 Sep 162
V. Geomagnetic A Indices
Observed Afr/Ap 08 Sep 005/007 Estimated Afr/Ap 09 Sep 008/006 Predicted Afr/Ap 10 Sep-12 Sep 008/010-008/012-012/015
VI. Geomagnetic Activity Probabilities 10 Sep to 12 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 30% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
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