Viewing archive of Saturday, 26 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 26 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 116 Issued at 2200Z on 26 APR 1997IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z
SOLAR ACTIVITY WAS VERY LOW. HOWEVER, NEW GROWTH
OCCURRED IN REGION 8035 (N18E10), WHICH WAS IN A STATE OF DECAY
YESTERDAY. NEWLY ASSIGNED REGION 8036 (S18W36) EMERGED QUICKLY TO BE
A C-TYPE SUNSPOT GROUP. THE X-RAY BACKGROUND SHOWS NO EFFECT OF THIS
NEW GROWTH, AND NO OPTICAL FLARES WERE REPORTED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW.
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN AT QUIET TO UNSETTLED CONDITIONS THROUGHOUT THE
INTERVAL.
III. Event Probabilities 27 APR to 29 APR
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 26 APR 071 Predicted 27 APR-29 APR 072/072/073 90 Day Mean 26 APR 074
V. Geomagnetic A Indices
OBSERVED AFR/AP 25 APR 008/007 ESTIMATED AFR/AP 26 APR 003/008 PREDICTED AFR/AP 27 APR-29 APR 005/005-010/008-010/008
VI. Geomagnetic Activity Probabilities 27 APR to 29 APR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 20% |
| Minor storm | 01% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 25% | 25% |
| Minor storm | 05% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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