Viewing archive of Sunday, 4 October 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 Oct 04 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 277 Issued at 2200Z on 04 OCT 1998IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z SOLAR ACTIVITY WAS VERY LOW. REGION 8350 (N20E41) IS
THE ONLY REGION WITH SPOTS ON THE VISIBLE DISK. THIS REGION SHOWED
SOME SLOW GROWTH THIS PERIOD AND PRODUCED SEVERAL B-CLASS SUBFLARES.
A SEVEN DEGREE FILAMENT DISAPPEARED NEAR S34W08. REMAINING REGIONS
HAVE BEEN VERY STABLE.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
VERY LOW. REGION 8350 HAS A SMALL CHANCE OF PRODUCING C-CLASS
ACTIVITY.
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN QUIET.
III. Event Probabilities 05 OCT to 07 OCT
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 04 OCT 115 Predicted 05 OCT-07 OCT 115/115/115 90 Day Mean 04 OCT 129
V. Geomagnetic A Indices
OBSERVED AFR/AP 03 OCT 016/014 ESTIMATED AFR/AP 04 OCT 005/009 PREDICTED AFR/AP 05 OCT-07 OCT 005/008-005/008-005/008
VI. Geomagnetic Activity Probabilities 05 OCT to 07 OCT
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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