Viewing archive of Wednesday, 27 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 27 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 239 Issued at 2200Z on 27 AUG 1997IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z SOLAR ACTIVITY HAS BEEN VERY LOW FOR THE PAST 24 HOURS.
DEVELOPMENT IN REGION 8076 (N29E38) IS TRENDING TOWARD
SIMPLIFICATION. NEW REGION 8078 (N17E27), A SMALL A-TYPE GROUP, WAS
NUMBERED. THIS REGION IS EMBEDDED IN THE SAME EXTENDED PLAGE REGION
AS 8076, BUT IS MAGNETICALLY SEPARATE. A 23-DEGREE-LONG FILAMENT
NEAR THE NW LIMB MAY HAVE DISAPPEARED LATE ON 26 AUGUST (UNCODED
REPORT). NO OTHER SIGNIFICANT DISK OR LIMB ACTIVITY WAS NOTED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
VERY LOW, WITH THE POSSIBILITY OF ISOLATED C-CLASS X-RAY ACTIVITY IN
THE REGION 8076/8078 COMPLEX.
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
THE GEOMAGNETIC FIELD WAS QUIET AT LOW AND MIDDLE GEOMAGNETIC
LATITUDES, WITH ONE UNSETTLED PERIOD OBSERVED BETWEEN 06-09 UT AT
HIGH GEOMAGNETIC LATITUDES.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO PERSIST AT QUIET LEVELS AT LOWER GEOMAGNETIC LATITUDES,
WITH THE POSSIBILITY OF UNSETTLED CONDITIONS AT HIGHER LATITUDES.
III. Event Probabilities 28 AUG to 30 AUG
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 27 AUG 082 Predicted 28 AUG-30 AUG 085/085/085 90 Day Mean 27 AUG 073
V. Geomagnetic A Indices
OBSERVED AFR/AP 26 AUG 003/003 ESTIMATED AFR/AP 27 AUG 003/005 PREDICTED AFR/AP 28 AUG-30 AUG 005/010-005/010-005/010
VI. Geomagnetic Activity Probabilities 28 AUG to 30 AUG
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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