Viewing archive of Friday, 27 August 2004
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 2004 Aug 27 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 240 Issued at 2200Z on 27 Aug 2004IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z Solar activity decreased to very low levels today.
Flares were limited to very minor B-class events today. Region 663
(N10W27) showed a little growth in magnetic complexity yet spot area
decreased over the period. Region 664 (S11W58) decayed into an Hsx
alpha spot group since yesterday. An eruptive prominence at S02 on
the west solar limb occurred at 27/0906Z through 27/0931Z. No new
regions were numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be at
very low to low levels. Region 663 has the potential to produce
isolated low level C-class flare activity.
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic field was at quiet to unsettled levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to unsettled levels throughout the period.
III. Event Probabilities 28 Aug to 30 Aug
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Aug 091 Predicted 28 Aug-30 Aug 090/085/085 90 Day Mean 27 Aug 110
V. Geomagnetic A Indices
Observed Afr/Ap 26 Aug 004/007 Estimated Afr/Ap 27 Aug 005/008 Predicted Afr/Ap 28 Aug-30 Aug 006/008-004/008-004/005
VI. Geomagnetic Activity Probabilities 28 Aug to 30 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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