Viewing archive of Wednesday, 24 December 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 Dec 24 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 358 Issued at 2200Z on 24 Dec 2003IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z Solar activity was low. Isolated low C-class and
B-class flares were observed in Regions 525 (N09W34), 528 (N09W04),
and 531 (N03W50). Region 528 maintains moderate size with some
magnetic complexity as it transits solar disk center; however,
activity from this region decreased considerably this period. Region
525 contains some weak mixed polarities, but activity in this region
was also quite limited. The remaining active regions were either
stable or in decay.
IB. Solar Activity Forecast
Solar activity is expected to continue
at low levels. C-class activity is expected in Region 525 and 528.
There is a slight chance for an M-class flare, primarily from Region
528.
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The geomagnetic field was quiet to unsettled. Solar wind speed
continues to gradually decline, ending the period below 450 km/s.
The greater than 2 MeV electron flux at geosynchronous orbit was
high today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be predominantly quiet with isolated unsettled periods.
III. Event Probabilities 25 Dec to 27 Dec
| Class M | 15% | 15% | 15% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 24 Dec 139 Predicted 25 Dec-27 Dec 145/145/140 90 Day Mean 24 Dec 137
V. Geomagnetic A Indices
Observed Afr/Ap 23 Dec 006/009 Estimated Afr/Ap 24 Dec 005/010 Predicted Afr/Ap 25 Dec-27 Dec 005/010-005/010-008/010
VI. Geomagnetic Activity Probabilities 25 Dec to 27 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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