Viewing archive of Friday, 14 August 1998
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 1998 Aug 14 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 226 Issued at 2200Z on 14 AUG 1998IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z SOLAR ACTIVITY WAS MODERATE. THIS WAS DUE TO A SINGLE
M-CLASS EVENT, AN M3/1N FROM REGION 8293 (S23W78) AT 14/0828UT. THIS
EVENT ALSO PRODUCED A TYPE II SWEEP. REGION 8293 IS THE PROCESS OF
CROSSING OVER THE WEST LIMB. ALTHOUGH ACTIVE EARLIER IN THE DAY IT
HAS BEEN RELATIVELY QUIET SINCE 14/1000UT. THE OTHER ACTIVE REGION
HAS BEEN 8299 (N16W13). THE REGION HAS CHANGED LITTLE, STILL AROUND
510 MILLIONTHS WITH A CKO BETA-GAMMA-DELTA SPOT GROUP. THIS REGION
SHOWED SOME PLAGE ENHANCEMENTS AND PRODUCED 2 C-CLASS EVENTS EARLY
IN THE DAY. IT HAS BEEN RELATIVELY STABLE SINCE 14/0700UT. THE OTHER
REGIONS HAVE BEEN MOSTLY STABLE AND QUIET. A NEW REGION WAS
NUMBERED: REGION 8303 (N20E52).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
REGION 8293 HAS A SLIGHT CHANCE OF PRODUCING AN M-CLASS FLARE BEFORE
IT ROTATES OVER THE WEST LIMB.
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
THE GEOMAGNETIC FIELD HAS BEEN QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO CONTINUE TO BE QUIET TO UNSETTLED.
III. Event Probabilities 15 AUG to 17 AUG
| Class M | 30% | 20% | 20% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 14 AUG 137 Predicted 15 AUG-17 AUG 135/130/125 90 Day Mean 14 AUG 112
V. Geomagnetic A Indices
OBSERVED AFR/AP 13 AUG 005/009 ESTIMATED AFR/AP 14 AUG 005/008 PREDICTED AFR/AP 15 AUG-17 AUG 005/008-005/008-005/020
VI. Geomagnetic Activity Probabilities 15 AUG to 17 AUG
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 20% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
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