Viewing archive of Saturday, 5 September 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 Sep 05 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 248 Issued at 2200Z on 05 SEP 1998IA. Analysis of Solar Active Regions and Activity from 04-2100Z to 05-2100Z SOLAR ACTIVITY REMAINED AT LOW LEVELS. REGION 8323
(S22W23) REMAINED LARGE WITH MODERATE MAGNETIC COMPLEXITY AND
DISPLAYED NO SIGNIFICANT GROWTH OR DECAY. IT PRODUCED ISOLATED
C-CLASS SUBFLARES. REGION 8326 (N21E50) ALSO PRODUCED ISOLATED
C-CLASS SUBFLARES, BUT WAS GENERALLY STABLE. NEW REGION 8329
(N15E52) WAS NUMBERED TODAY; IT WAS FORMERLY CONSIDERED THE SOUTHERN
PORTION OF REGION 8326.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. REGION 8323 MAY PRODUCE M-CLASS FLARES. THERE IS ALSO A
SLIGHT CHANCE FOR A MAJOR FLARE FROM THIS REGION.
IIA. Geophysical Activity Summary 04-2100Z to 05-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. THE GREATER THAN 2 MEV
ELECTRON FLUX AT GEOSYNCHRONOUS ALTITUDE WAS AT MODERATE TO HIGH
LEVELS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN AT QUIET TO UNSETTLED LEVELS. THE GREATER THAN 2
MEV ELECTRON FLUX IS EXPECTED TO DECLINE TO NORMAL TO MODERATE
LEVELS EARLY IN THE PERIOD.
III. Event Probabilities 06 SEP to 08 SEP
| Class M | 60% | 60% | 60% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 05 SEP 154 Predicted 06 SEP-08 SEP 150/150/150 90 Day Mean 05 SEP 123
V. Geomagnetic A Indices
OBSERVED AFR/AP 04 SEP 004/007 ESTIMATED AFR/AP 05 SEP 004/010 PREDICTED AFR/AP 06 SEP-08 SEP 008/010-005/008-005/008
VI. Geomagnetic Activity Probabilities 06 SEP to 08 SEP
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 20% |
| Minor storm | 20% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
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