Viewing archive of Tuesday, 9 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 09 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 343 Issued at 2200Z on 09 DEC 1997IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z SOLAR ACTIVITY WAS VERY LOW. REGIONS 8116 (N25W15), A 5
SPOT CSO GROUP, AND 8119 (N32W13), AN 8 SPOT CRO GROUP, ARE IN CLOSE
PROXIMITY AND EXHIBITED SLOW GROWTH IN THE PAST 24 HOURS. REGIONS
8118 (S39E25), A 7 SPOT CAO, AND 8120 (S22E22), A 9 SPOT CRO, ALSO
SHOWED SIGNS OF DEVELOPMENT BUT ALL 4 REGIONS MAINTAIN SIMPLE
MAGNETIC CONFIGURATIONS AND HAVE YET TO PRODUCE ANY FLARE ACTIVITY.
A NEW SMALL COMPACT PLAGE REGION IS DEVELOPING NEAR N26W38 BUT NO
SPOTS ARE VISIBLE IN WHITE LIGHT YET. REMAINING REGIONS HAVE BEEN
QUIET AND STABLE.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW TO LOW. ALL 4 SPOT REGIONS MENTIONED ABOVE EXHIBITED PERIODIC
POINT BRIGHTNINGS IN THE PAST 24 HOURS. SEVERAL MINOR RADIO BURSTS
AND SWEEPS ALSO OCCURRED INDICATING GROWTH. VERY ISOLATED C-CLASS
FLARING IS POSSIBLE FROM THESE REGIONS IF GROWTH CONTINUES.
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
THE GEOMAGNETIC FIELD HAS BEEN QUIET AT ALL LATITUDES. SOLAR WIND
VELOCITY HAS DROPPED TO NEAR 200 KM/S.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO REACH UNSETTLED TO ACTIVE CONDITIONS BY TOMORROW DUE TO
THE VERY LONG DURATION C1 FLARE AND ASSOCIATED HALO/CME ON 6
DECEMBER. DISTURBED CONDITIONS SHOULD PERSIST THROUGH 11 DECEMBER
AND RETURN TO QUIET BY THE 12TH.
III. Event Probabilities 10 DEC to 12 DEC
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 09 DEC 097 Predicted 10 DEC-12 DEC 097/098/100 90 Day Mean 09 DEC 094
V. Geomagnetic A Indices
OBSERVED AFR/AP 08 DEC 001/002 ESTIMATED AFR/AP 09 DEC 002/008 PREDICTED AFR/AP 10 DEC-12 DEC 020/013-020/013-010/010
VI. Geomagnetic Activity Probabilities 10 DEC to 12 DEC
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 05% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 40% | 40% | 10% |
| Minor storm | 10% | 10% | 01% |
| Major-severe storm | 05% | 01% | 01% |
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