Viewing archive of Tuesday, 26 August 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 Aug 26 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 238 Issued at 2200Z on 26 AUG 1997IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z SOLAR ACTIVITY WAS LOW. REGION 8076 (N30E51), STILL
GROWING, PRODUCTED TWO C4/SF FLARES IN THE PAST 24 HOURS. REGION
8077 (S22E45), STABILIZED AND HAS BEEN QUIET. THE REMAINDER OF THE
VISIBLE DISK WAS QUIET AND STABLE.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
LOW. REGION 8076 HAS GOOD POTENTIAL FOR ADDITIONAL C-CLASS EVENTS
AND AN OUTSIDE CHANCE OF AN ISOLATED M-CLASS FLARE.
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED FOR THE ENTIRE FORECAST PERIOD.
DAYS TWO AND THREE MAY SHOW ISOLATED PERIODS OF ACTIVE LEVELS,
ESPECIALLY AT HIGH LATITUDES, AS A WEAK POLAR CORONAL HOLE
EXTENSION MOVES INTO A FAVORABLE POSITION.
III. Event Probabilities 27 AUG to 29 AUG
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 26 AUG 084 Predicted 27 AUG-29 AUG 086/086/086 90 Day Mean 26 AUG 073
V. Geomagnetic A Indices
OBSERVED AFR/AP 25 AUG 004/004 ESTIMATED AFR/AP 26 AUG 003/005 PREDICTED AFR/AP 27 AUG-29 AUG 010/012-010/010-010/010
VI. Geomagnetic Activity Probabilities 27 AUG to 29 AUG
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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