Viewing archive of Monday, 1 December 1997
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 1997 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 1997IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 01-2100Z SOLAR ACTIVITY WAS MODERATE. REGION 8113 (N21E09)
GENERATED AN M1/1N FLARE AT 01/0237Z. SINCE THAT TIME, ONLY MINOR
C-CLASS ACTIVITY HAS BEEN OBSERVED. REGION 8113 IS DOWN IN OVERALL
AREA SINCE YESTERDAY TO APPROXIMATELY 550 MILLIONTHS, BUT ITS SPOT
COUNT REMAINS HIGH AT 50. WITH THE SPLITTING OF ITS TRAILING
PENUMBRA INTO THREE SEPARATE PENUMBRAS, REGION 8113 IS CURRENTLY
CLASSIFIED AS AN 'FHI' BETA-GAMMA, HAVING LOST ITS PREVIOUS DELTA
MAGNETIC CONFIGURATION.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE
MODERATE TO HIGH, WITH THE CONTINUED HIGH PROBABILITY OF MAJOR
FLARES FROM REGION 8113.
IIA. Geophysical Activity Summary 30-2100Z to 01-2100Z
THE GEOMAGNETIC FIELD HAS BEEN QUIET FOR THE PAST 24 HOURS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE MOSTLY QUIET FOR THE NEXT 24 HOURS, WITH ACTIVITY
INCREASING TO QUIET TO UNSETTLED ON DAYS TWO AND THREE.
III. Event Probabilities 02 DEC to 04 DEC
| Class M | 75% | 75% | 75% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | YELLOW | ||
IV. Penticton 10.7 cm Flux
Observed 01 DEC 117 Predicted 02 DEC-04 DEC 120/120/120 90 Day Mean 01 DEC 094
V. Geomagnetic A Indices
OBSERVED AFR/AP 30 NOV 006/004 ESTIMATED AFR/AP 01 DEC 004/008 PREDICTED AFR/AP 02 DEC-04 DEC 010/010-015/015-015/015
VI. Geomagnetic Activity Probabilities 02 DEC to 04 DEC
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 20% |
| Minor storm | 05% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 20% |
| Minor storm | 05% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
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