Viewing archive of Saturday, 27 August 2005
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 2005 Aug 27 2204 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 239 Issued at 2200Z on 27 Aug 2005IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z Solar activity was low. Region 803 (N11E40) produced
both of today's two C-class flares, a C2/Sf at 26/2202 UTC and a
C1/Sf at 27/2051 UTC. Region 803 is the largest group on the disk
(130 millionths) and has some magnetic complexity. The other spotted
groups on the disk were quiet and stable. New spots emerged in
Region 801 (N09W31) during the past 24 hours and newly assigned
Region 805 (S08E73) rotated into view.
IB. Solar Activity Forecast
Solar activity is expected to be low
for 28-30 August. There is a slight chance, however, for an isolated
M-class event from Region 803.
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic field was mostly quiet during the past 24 hours. The
greater than 2 MeV electron flux was at high levels.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled for 28-30 August.
III. Event Probabilities 28 Aug to 30 Aug
| Class M | 15% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Aug 092 Predicted 28 Aug-30 Aug 090/090/085 90 Day Mean 27 Aug 094
V. Geomagnetic A Indices
Observed Afr/Ap 26 Aug 005/011 Estimated Afr/Ap 27 Aug 007/008 Predicted Afr/Ap 28 Aug-30 Aug 007/010-007/010-007/010
VI. Geomagnetic Activity Probabilities 28 Aug to 30 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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