Viewing archive of Sunday, 31 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 31 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 243 Issued at 2200Z on 31 AUG 1997IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 31-2100Z SOLAR ACTIVITY WAS LOW. REGION 8076 (N29W15) PRODUCED
OCCASIONAL C-CLASS FLARES, THE LARGEST A C2/0F AT 1131Z. THE REGION
CONSISTS OF MORE THAN 30 SPOTS AND MEASURES APPROXIMATELY 200
MILLIONTHS IN WHITE LIGHT. 8076 DOMINATES A COMPLEX OF REGIONS, OF
WHICH 8078 (N21W20) IS THE SOUTHERN PARTNER. THIS EXTENDED GROUP HAS
BASICALLY A SIMPLE NEUTRAL LINE, NOT APPEARING TO HAVE ANY STRONG
MAGNETIC GRADIENTS. NEWLY NUMBERED REGION 8081 (N34E72) ROTATED INTO
VIEW.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW,
WITH REGION 8076 PROVIDING THE C-CLASS FLARES.
IIA. Geophysical Activity Summary 30-2100Z to 31-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO MILDLY UNSETTLED. THE GREATER THAN
2 MEV ELECTRON FLUX AT GOES REACHED HIGH LEVELS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO PERSIST AT QUIET TO SLIGHTLY UNSETTLED LEVELS FOR THE
NEXT THREE DAYS.
III. Event Probabilities 01 SEP to 03 SEP
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 31 AUG 096 Predicted 01 SEP-03 SEP 096/096/094 90 Day Mean 31 AUG 074
V. Geomagnetic A Indices
OBSERVED AFR/AP 30 AUG 012/011 ESTIMATED AFR/AP 31 AUG 005/010 PREDICTED AFR/AP 01 SEP-03 SEP 005/008-005/006-005/005
VI. Geomagnetic Activity Probabilities 01 SEP to 03 SEP
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 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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