Viewing archive of Saturday, 31 October 1998
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 1998 Oct 31 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 304 Issued at 2200Z on 31 OCT 1998IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 31-2100Z SOLAR ACTIVITY WAS VERY LOW. REGION 8375 (N17E45) IS
THE DOMINANT FEATURE ON AN OTHERWISE DULL DISK. THE OTHER FOUR
SPOTTED REGIONS ARE SMALL AND SIMPLE. THE LIMBS WERE QUIET.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW TO LOW.
IIA. Geophysical Activity Summary 30-2100Z to 31-2100Z
THE GEOMAGNETIC FIELD WAS QUIET. ENERGETIC ELECTRONS AT
GEOSYNCHRONOUS ORBIT REMAINED AT HIGH LEVELS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 01 NOV to 03 NOV
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 31 OCT 119 Predicted 01 NOV-03 NOV 125/125/125 90 Day Mean 31 OCT 131
V. Geomagnetic A Indices
OBSERVED AFR/AP 30 OCT 004/005 ESTIMATED AFR/AP 31 OCT 003/008 PREDICTED AFR/AP 01 NOV-03 NOV 005/008-005/008-010/008
VI. Geomagnetic Activity Probabilities 01 NOV to 03 NOV
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 25% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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