Viewing archive of Wednesday, 8 April 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 Apr 08 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 098 Issued at 2200Z on 08 APR 1998IA. Analysis of Solar Active Regions and Activity from 07-2100Z to 08-2100Z SOLAR ACTIVITY WAS LOW. REGION 8195 (S27E38) PRODUCED
THE LARGEST OPTICALLY-CORRELATED FLARE OF THE PAST DAY, A C1/SF AT
08/1953Z. THIS ACTIVE REGION IS PART OF A COMPLEX THAT ALSO INCLUDES
SEC REGIONS 8194 (S19E36) AND 8198 (S28E60). THIS AREA HAS BEEN
RELATIVELY QUIET SINCE ROTATING INTO VIEW OVER THE PAST TWO DAYS.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. THE MOST LIKELY AREAS OF M-CLASS ACTIVITY REMAIN THE
8194/8195/8198 COMPLEX AND THE AREA COMPRISED OF REGIONS 8193
(S23W12) AND 8199 (S27W16).
IIA. Geophysical Activity Summary 07-2100Z to 08-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 09 APR to 11 APR
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 08 APR 141 Predicted 09 APR-11 APR 144/146/146 90 Day Mean 08 APR 101
V. Geomagnetic A Indices
OBSERVED AFR/AP 07 APR 008/008 ESTIMATED AFR/AP 08 APR 010/008 PREDICTED AFR/AP 09 APR-11 APR 010/010-010/010-010/010
VI. Geomagnetic Activity Probabilities 09 APR to 11 APR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
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