Viewing archive of Wednesday, 16 April 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 Apr 16 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 106 Issued at 2200Z on 16 APR 1997IA. Analysis of Solar Active Regions and Activity from 15-2100Z to 16-2100Z SOLAR ACTIVITY WAS VERY LOW. TODAY'S ACTIVITY WAS
CHARACTERIZED BY OCCASIONAL SMALL B-CLASS EVENTS. REGION 8032
(S22W08) EXHIBITED SLOW DECLINE DURING THE DAY. REGION 8031 (S30W87)
IS ROTATING OFF THE DISK AND WAS STABLE.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW TO LOW.
IIA. Geophysical Activity Summary 15-2100Z to 16-2100Z
THE GEOMAGNETIC FIELD WAS QUIET UNTIL ABOUT 1200UT. SINCE THEN THE
MID-LATITUDE SITES HAVE BEEN MOSTLY UNSETTLED AND THE HIGH LATITUDE
SITES HAVE BEEN UNSETTLED TO ACTIVE.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED FOR THE NEXT THREE DAYS.
III. Event Probabilities 17 APR to 19 APR
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 16 APR 075 Predicted 17 APR-19 APR 073/071/070 90 Day Mean 16 APR 074
V. Geomagnetic A Indices
OBSERVED AFR/AP 15 APR 002/004 ESTIMATED AFR/AP 16 APR 005/005 PREDICTED AFR/AP 17 APR-19 APR 005/008-010/015-005/008
VI. Geomagnetic Activity Probabilities 17 APR to 19 APR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 05% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 05% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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