Viewing archive of Saturday, 25 September 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 Sep 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 269 Issued at 2200Z on 25 Sep 2004IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity was at very low levels today. Region
673 (S13W57) was responsible for some very minor activity today.
This region continues to exhibit decay and is now a two spot alpha
magnetic group. Region 675 (S08E75) was numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be at
very low levels throughout the period.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field was at quiet to unsettled levels today. The
greater than 2 MeV electron flux at geosynchronous orbit reached
high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to unsettled levels throughout the period.
III. Event Probabilities 26 Sep to 28 Sep
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Sep 090 Predicted 26 Sep-28 Sep 090/090/095 90 Day Mean 25 Sep 111
V. Geomagnetic A Indices
Observed Afr/Ap 24 Sep 005/006 Estimated Afr/Ap 25 Sep 005/008 Predicted Afr/Ap 26 Sep-28 Sep 005/008-005/008-005/008
VI. Geomagnetic Activity Probabilities 26 Sep to 28 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| 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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