Viewing archive of Wednesday, 2 December 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 Dec 02 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 336 Issued at 2200Z on 02 DEC 1998IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z SOLAR ACTIVITY WAS LOW. A FEW C-CLASS SUBFLARES
OCCURRED IN REGIONS 8395 (N20W17) AND 8402 (N18E53). REGION 8395
CONTINUES TO DECAY SLOWLY. REGIONS 8393 (S16W45), 8398 (N18W28),
8399 (N26W04), AND 8400 (S18W21) HAVE ALSO DECAYED. OTHER REGIONS
HAVE CHANGED LITTLE.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. C-CLASS FLARES ARE POSSIBLE IN REGIONS 8395, 8397, AND
8402. ALTHOUGH AN ISOLATED M-CLASS FLARE IS ALSO POSSIBLE IN THESE
REGIONS, THE CHANCE OF MAJOR FLARE ACTIVITY IS BECOMING LESS LIKELY.
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 03 DEC to 05 DEC
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 02 DEC 152 Predicted 03 DEC-05 DEC 150/148/146 90 Day Mean 02 DEC 131
V. Geomagnetic A Indices
OBSERVED AFR/AP 01 DEC 010/013 ESTIMATED AFR/AP 02 DEC 005/012 PREDICTED AFR/AP 03 DEC-05 DEC 010/010-010/010-010/010
VI. Geomagnetic Activity Probabilities 03 DEC to 05 DEC
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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