Viewing archive of Saturday, 23 October 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 Oct 23 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 297 Issued at 2200Z on 23 Oct 2004IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z Solar activity was low. A C9.9 flare occurred at
23/1654 UTC from Region 687 (N11E28). Region 687 also produced a
C8.0 flare at 23/1922 UTC. Region 682 (S13W73) produced a low level
C flare. New Region 691 (N16E69) was numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be low
to moderate. Region 687 may produce isolated M-class activity.
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled.
III. Event Probabilities 24 Oct to 26 Oct
| Class M | 55% | 55% | 55% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 23 Oct 132 Predicted 24 Oct-26 Oct 130/130/130 90 Day Mean 23 Oct 104
V. Geomagnetic A Indices
Observed Afr/Ap 22 Oct 005/006 Estimated Afr/Ap 23 Oct 004/005 Predicted Afr/Ap 24 Oct-26 Oct 005/005-010/012-010/008
VI. Geomagnetic Activity Probabilities 24 Oct to 26 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 20% |
| Minor storm | 05% | 10% | 10% |
| Major-severe storm | 01% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 25% | 25% |
| Minor storm | 10% | 15% | 15% |
| Major-severe storm | 05% | 05% | 05% |
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