Viewing archive of Wednesday, 10 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 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 344 Issued at 2200Z on 10 DEC 1997IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z SOLAR ACTIVITY WAS VERY LOW. NUMEROUS OPTICALLY
UNCORRELATED MINOR RADIO SWEEPS OCCURRED EARLY IN THE PERIOD BUT
ACTIVITY TAPERED OFF BY 10/1000UT. REGION 8119 (N33W25), AN 8 SPOT DAO
GROUP, IS THE ONLY REGION SHOWING ANY SIGNS OF GROWTH BUT STILL
MAINTAINS A SIMPLE MAGNETIC CONFIGURATION. NEW REGION 8121 (N25W55),
A 3 SPOT BXO, WAS NUMBERED TODAY. ALL REMAINING REGIONS ARE SMALL
AND SHOWING SIGNS OF DECAY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW. REGION 8119 IS THE ONLY REGION POSING ANY THREAT BUT NEEDS
FURTHER DEVELOPMENT BEFORE C-CLASS FLARING IS LIKELY.
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
THE GEOMAGNETIC FIELD BEGAN THE PERIOD AT QUIET LEVELS BUT QUICKLY
ESCALATED TO UNSETTLED AT 10/0600UT AND ACTIVE CONDITIONS AT
10/1200UT. UNSETTLED TO ACTIVE CONDITIONS HAVE PERSISTED SINCE. THIS
DISTURBANCE IS A RESULT OF THE 6 DECEMBER VERY LONG DURATION C1
FLARE AND ASSOCIATED HALO/CME.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN UNSETTLED TO ACTIVE THROUGH TOMORROW BECOMING
QUIET TO UNSETTLED LATE. EXPECT QUIET TO UNSETTLED CONDITIONS ON
DAY 2 AND 3.
III. Event Probabilities 11 DEC to 13 DEC
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 10 DEC 095 Predicted 11 DEC-13 DEC 093/091/093 90 Day Mean 10 DEC 094
V. Geomagnetic A Indices
OBSERVED AFR/AP 09 DEC 001/002 ESTIMATED AFR/AP 10 DEC 020/017 PREDICTED AFR/AP 11 DEC-13 DEC 020/015-010/010-010/008
VI. Geomagnetic Activity Probabilities 11 DEC to 13 DEC
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 15% | 05% |
| Minor storm | 10% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 45% | 20% | 10% |
| Minor storm | 20% | 10% | 01% |
| Major-severe storm | 05% | 01% | 01% |
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