Viewing archive of Tuesday, 14 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 14 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 226 Issued at 2200Z on 14 Aug 2001IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z
Solar activity was low, with the largest event being an
impulsive C9 flare, associated with an eruptive prominence on the
east limb near N40, at 14/0944 UTC. There was also a long duration
C2 event, with associations to a disappearing filament near N26W10,
as well as a sympathetic subfaint flare in spotless plage Region
9577 (N16W36), at 14/1242 UTC. A full halo CME was evident in
SOHO/LASCO imagery following this event. Two new regions were
numbered today: 9579 (S17W10) and 9580 (N24E73).
IB. Solar Activity Forecast
Solar activity is expected to be
predominantly low, with an isolated chance for moderate flare
activity from Region 9574 (S04W61), or from closely spaced regions
9570 (S10W47) and 9578 (S08W38).
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
The geomagnetic field was quiet to active, under the continuing
influence of weak high speed stream effects from a coronal hole.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mainly quiet to unsettled for the first two days.
Isolated active conditions are possible during the first day, as the
weak coronal hole effects wane. By day three, active to minor storm
conditions, with isolated major storm periods, are possible due to
the expected shock arrival from the CME activity described above in
section 1A.
III. Event Probabilities 15 Aug to 17 Aug
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 14 Aug 147 Predicted 15 Aug-17 Aug 145/145/140 90 Day Mean 14 Aug 151
V. Geomagnetic A Indices
Observed Afr/Ap 13 Aug 015/019 Estimated Afr/Ap 14 Aug 012/013 Predicted Afr/Ap 15 Aug-17 Aug 012/012-015/015-025/025
VI. Geomagnetic Activity Probabilities 15 Aug to 17 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 25% | 35% |
| Minor storm | 10% | 15% | 20% |
| Major-severe storm | 01% | 05% | 10% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 30% | 40% |
| Minor storm | 15% | 15% | 25% |
| Major-severe storm | 05% | 05% | 10% |
All times in UTC
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