Viewing archive of Saturday, 23 November 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 Nov 23 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 327 Issued at 2200Z on 23 Nov 2002IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z Solar activity was at low levels. The largest flare of
the period was an optically uncorrelated C4.6 x-ray event that
occurred at 23/0804 UTC. Region 198 (S18W25) produced multiple low
level C-class flares during the period. This region underwent no
significant changes in magnetic complexity or penumbral coverage
(520 millionths in areal coverage). The remaining numbered regions
were mostly quiescent throughout the period. No new regions were
numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be at
low levels. Region 198 remains capable of producing M-class flares.
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
The geomagnetic field was at quiet to active levels. Minor to major
storm conditions were experienced between 23/0300 to 0600 UTC due to
high speed solar wind resulting from the from the favorably
positioned coronal hole in the western solar hemisphere. The
greater than 2 MeV electron flux at geosychronous orbit reached high
levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to return to predominantly quiet to unsettled levels.
Active conditions are possible (mostly at high latitudes) due to the
elevated solar wind speed through day one of the forecast period as
the effects from the coronal hole subside.
III. Event Probabilities 24 Nov to 26 Nov
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 23 Nov 148 Predicted 24 Nov-26 Nov 150/160/165 90 Day Mean 23 Nov 173
V. Geomagnetic A Indices
Observed Afr/Ap 22 Nov 017/024 Estimated Afr/Ap 23 Nov 015/020 Predicted Afr/Ap 24 Nov-26 Nov 010/015-010/012-008/010
VI. Geomagnetic Activity Probabilities 24 Nov to 26 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 25% | 20% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
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