Viewing archive of Friday, 7 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 07 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 250 Issued at 2200Z on 07 Sep 2001IA. Analysis of Solar Active Regions and Activity from 06-2100Z to 07-2100Z Solar activity was moderate due to an M1/1F flare at
07/1538 UTC in Region 9601 (N13W64). This flare was associated with
type II/IV radio sweeps and minor discrete bursts across the
spectrum. Region 9608 (S26E45) also generated a number of smaller
flares. These areas remain the largest and most complex groups on
the sun and have exhibited frequent small flares and plage
fluctuations. Region 9610 (S13E60) has rotated fully into view as an
E-type sunspot group of about 300 millionths in area. New Regions
9611 (N10W23), 9612 (N22E40), and 9613 (S17W52) were numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be
moderate to high. M-class flares, as well as an isolated major
flare, are possible in Regions 9601 and 9608. Region 9610 appears
capable of a low-level M-class flare as well.
IIA. Geophysical Activity Summary 06-2100Z to 07-2100Z
The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled.
III. Event Probabilities 08 Sep to 10 Sep
| Class M | 75% | 75% | 75% |
| Class X | 15% | 15% | 15% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 07 Sep 226 Predicted 08 Sep-10 Sep 230/230/230 90 Day Mean 07 Sep 160
V. Geomagnetic A Indices
Observed Afr/Ap 06 Sep 003/008 Estimated Afr/Ap 07 Sep 008/008 Predicted Afr/Ap 08 Sep-10 Sep 005/008-005/008-008/010
VI. Geomagnetic Activity Probabilities 08 Sep to 10 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% |
All times in UTC
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