Viewing archive of Monday, 25 August 2003
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 2003 Aug 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 237 Issued at 2200Z on 25 Aug 2003IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity was low. There were two C-class flares
observed during the past 24 hours, a C1 at 24/2337 UTC from Region
436 (N07W39) and a C3/1f at 0259 UTC from Region 442 (S13E30). The
C3 flare was long duration and was associated with an erupting
prominence (located near S09E38). The event was followed by an
associated coronal mass ejection which was observed off the
southeast limb in C3 coronagraph data. New Region 445 (N04E38) was
assigned today.
IB. Solar Activity Forecast
Solar activity is expected to be
predominantly low for the next three days. There is a slight chance
for an isolated M-class flare.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field ranged from unsettled to minor storm levels.
Today's activity was initially at active levels in response to a
high speed solar wind stream. Activity increased to minor storm
levels from 0600-0900 UTC, but then backed off to mostly unsettled
levels from 0900 through the end of the day. The greater than 2 MeV
electron flux was at high levels during the past 24 hours.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be unsettled with occasional active periods during the
next two days as the current disturbance persists. A decline to
mostly unsettled is expected on the third day.
III. Event Probabilities 26 Aug to 28 Aug
| Class M | 20% | 20% | 20% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Aug 117 Predicted 26 Aug-28 Aug 120/120/125 90 Day Mean 25 Aug 127
V. Geomagnetic A Indices
Observed Afr/Ap 24 Aug 014/024 Estimated Afr/Ap 25 Aug 020/023 Predicted Afr/Ap 26 Aug-28 Aug 015/015-015/012-012/012
VI. Geomagnetic Activity Probabilities 26 Aug to 28 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 30% |
| Minor storm | 20% | 20% | 15% |
| Major-severe storm | 10% | 10% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 30% |
| Minor storm | 25% | 25% | 20% |
| Major-severe storm | 15% | 15% | 10% |
All times in UTC
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