Viewing archive of Friday, 17 October 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 Oct 17 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 290 Issued at 2200Z on 17 OCT 1997IA. Analysis of Solar Active Regions and Activity from 16-2100Z to 17-2100Z SOLAR ACTIVITY WAS VERY LOW. REGION 8093 (N31W60)
PRODUCED THREE SUBFLARES, THE STRONGEST A B3/SF AT 17/1420Z. A CME
WAS OBSERVED ON LASCO IMAGES OFF THE SW LIMB IN ASSOCIATION WITH THE
B1 FLARE ON 16/2147Z.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW.
IIA. Geophysical Activity Summary 16-2100Z to 17-2100Z
THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED. THIS FORECAST MAY BE MODIFIED
AFTER FURTHER ANALYSIS OF THE CME MENTIONED IN PART IA.
III. Event Probabilities 18 OCT to 20 OCT
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 17 OCT 088 Predicted 18 OCT-20 OCT 088/088/090 90 Day Mean 17 OCT 086
V. Geomagnetic A Indices
OBSERVED AFR/AP 16 OCT 006/003 ESTIMATED AFR/AP 17 OCT 006/004 PREDICTED AFR/AP 18 OCT-20 OCT 010/008-010/008-005/005
VI. Geomagnetic Activity Probabilities 18 OCT to 20 OCT
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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