Viewing archive of Tuesday, 1 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 01 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 335 Issued at 2200Z on 01 DEC 1998IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 01-2100Z SOLAR ACTIVITY WAS LOW. FLARES OCCURRED IN REGIONS 8392
(S22W59), 8395 (N20W01), 8397 (N14E46), AND 8402 (N17E64). REGION
8402 IS THE NEWLY NUMBERED AREA ROTATING ONTO THE DISK BEHIND REGION
8397. YET ANOTHER SUNSPOT GROUP APPEARS TO BE BEHIND REGION 8402 AND
WILL MOST LIKELY BE NUMBERED AFTER MORE OF IT BECOMES VISIBLE.
REGION 8395 WAS THE MOST ACTIVE SUNSPOT GROUP OVER THE PAST DAY,
PRODUCING SEVERAL C-CLASS FLARES. THIS REGION APPEARS TO BE SHOWING
SIGNS OF SIMPLIFICATION.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. C-CLASS ACTIVITY IS PROBABLE FROM REGIONS 8395, 8397,
AND 8402. AN ISOLATED MAJOR FLARE IS POSSIBLE IN THESE REGIONS AS
WELL.
IIA. Geophysical Activity Summary 30-2100Z to 01-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 02 DEC to 04 DEC
| Class M | 40% | 40% | 40% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 01 DEC 163 Predicted 02 DEC-04 DEC 162/160/160 90 Day Mean 01 DEC 131
V. Geomagnetic A Indices
OBSERVED AFR/AP 30 NOV 012/013 ESTIMATED AFR/AP 01 DEC 012/010 PREDICTED AFR/AP 02 DEC-04 DEC 010/012-010/010-010/010
VI. Geomagnetic Activity Probabilities 02 DEC to 04 DEC
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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