Viewing archive of Friday, 28 November 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 Nov 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 332 Issued at 2200Z on 28 NOV 1997IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z SOLAR ACTIVITY WAS HIGH. REGION 8113 (N20E48) PRODUCED
ANOTHER MAJOR FLARE, AN M6/2B AT 28/0503Z. IT ALSO GENERATED AN
M1/SF AT 28/2009Z AND SEVERAL C-CLASS FLARES DURING THE PERIOD. THIS
REGION REMAINS A MAGNETICALLY COMPLEX E-TYPE SUNSPOT GROUP. OTHER
REGIONS WERE QUIET.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE
MODERATE TO HIGH. REGION 8113 APPEARS CAPABLE OF ANOTHER MAJOR
FLARE.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
THE GEOMAGNETIC FIELD WAS QUIET. THE GREATER THAN 2 MEV ELECTRON FLUX
REMAINED HIGH.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET FOR THE NEXT 24 HOURS OR SO, BECOMING QUIET TO
UNSETTLED BY THE END OF THE THREE DAY FORECAST PERIOD.
III. Event Probabilities 29 NOV to 01 DEC
| Class M | 75% | 75% | 75% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | YELLOW | ||
IV. Penticton 10.7 cm Flux
Observed 28 NOV 116 Predicted 29 NOV-01 DEC 120/125/125 90 Day Mean 28 NOV 093
V. Geomagnetic A Indices
OBSERVED AFR/AP 27 NOV 002/002 ESTIMATED AFR/AP 28 NOV 003/003 PREDICTED AFR/AP 29 NOV-01 DEC 005/005-005/008-010/010
VI. Geomagnetic Activity Probabilities 29 NOV to 01 DEC
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 05% |
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