Viewing archive of Saturday, 13 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 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 347 Issued at 2200Z on 13 DEC 1997IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z SOLAR ACTIVITY WAS VERY LOW. REGION 8116 (N24W67)
PRODUCED A MODERATE DURATION B9/SF AT 12/2232Z. REGIONS 8119
(N31W62) AND 8122 (N30W32) WERE PREDOMINANTLY STABLE. SOME MINOR
MIXED POLARITIES WERE OBSERVED IN REGION 8119.
IB. Solar Activity Forecast
SOLAR ACTIVITY SHOULD BE VERY LOW TO
LOW. REGIONS 8119 AND 8122 ARE CAPABLE OF PRODUCING ISOLATED SMALL
C-CLASS EVENTS.
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD SHOULD BE
AT QUIET TO SLIGHTLY UNSETTLED LEVELS FOR THE NEXT THREE DAYS.
III. Event Probabilities 14 DEC to 16 DEC
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 13 DEC 089 Predicted 14 DEC-16 DEC 085/083/080 90 Day Mean 13 DEC 093
V. Geomagnetic A Indices
OBSERVED AFR/AP 12 DEC 002/002 ESTIMATED AFR/AP 13 DEC 002/008 PREDICTED AFR/AP 14 DEC-16 DEC 005/008-005/008-005/008
VI. Geomagnetic Activity Probabilities 14 DEC to 16 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% | 05% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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