Viewing archive of Saturday, 7 December 2002
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 2002 Dec 07 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 341 Issued at 2200Z on 07 Dec 2002IA. Analysis of Solar Active Regions and Activity from 06-2100Z to 07-2100Z Solar activity was at low levels. An optically
uncorrelated C2 flare occurred at 07/1000 UTC. Region 208 (N09W38)
continues a gradual decay in area coverage and has simplified to a
beta magnetic configuration. Region 214 (N13W55) has grown slightly
in area coverage and developed a beta-gamma magnetic configuration.
Weak polarity mixing has developed in the intermediate area. No
other significant changes on the visible disk were observed in the
last twenty-four hours.
IB. Solar Activity Forecast
Solar activity is expected to be low.
IIA. Geophysical Activity Summary 06-2100Z to 07-2100Z
The geomagnetic field was at quiet to active levels due to coronal
hole effects. Solar wind velocities reached peak values near 600
km/s at 07/0900 UTC and have stabilized near 550 km/s. The Bz
component of the interplanetary magnetic field has been
predominantly positive resulting in only isolated active conditions.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled with a chance of isolated active
conditions on day one and day two of the forecast period. Quiet to
unsettled conditions are expected by day three.
III. Event Probabilities 08 Dec to 10 Dec
| Class M | 25% | 25% | 25% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 07 Dec 151 Predicted 08 Dec-10 Dec 155/160/165 90 Day Mean 07 Dec 168
V. Geomagnetic A Indices
Observed Afr/Ap 06 Dec 006/010 Estimated Afr/Ap 07 Dec 012/018 Predicted Afr/Ap 08 Dec-10 Dec 015/020-012/012-010/010
VI. Geomagnetic Activity Probabilities 08 Dec to 10 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 20% | 20% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 25% | 20% |
| Minor storm | 15% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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