Viewing archive of Friday, 24 August 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 Aug 24 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 236 Issued at 2200Z on 24 Aug 2001IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z Solar activity was moderate. An M1/Sf flare occurred at
24/0913 UTC in Region 9591 (S18E42). This area also produced several
C-class flares throughout the day. The 9591 sunspot group remains an
elongated F-type configuration of about 700 millionths area and
moderate magnetic complexity. Other disk regions were relatively
inactive. New Regions 9594 (N37E05) and 9595 ( N16E27) were
numbered.
IB. Solar Activity Forecast
Solar activity is expected to be
moderate with additional M-class flares from Region 9591 and the
possibility of a major flare.
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled becoming unsettled to active due
to coronal hole effects. A solar energetic proton event at greater
than 10 MeV is possible if 9591 generates a major flare.
III. Event Probabilities 25 Aug to 27 Aug
| Class M | 50% | 60% | 70% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 24 Aug 175 Predicted 25 Aug-27 Aug 180/190/200 90 Day Mean 24 Aug 152
V. Geomagnetic A Indices
Observed Afr/Ap 23 Aug 007/012 Estimated Afr/Ap 24 Aug 005/006 Predicted Afr/Ap 25 Aug-27 Aug 010/010-015/012-015/020
VI. Geomagnetic Activity Probabilities 25 Aug to 27 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 25% | 25% |
| Minor storm | 01% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 30% | 30% |
| Minor storm | 05% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
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