Viewing archive of Monday, 9 February 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 Feb 09 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 040 Issued at 2200Z on 09 FEB 1998IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z SOLAR ACTIVITY WAS VERY LOW. A FEW B-CLASS X-RAY BURSTS
WERE DETECTED. THERE WERE TWO SMALL, STABLE SPOT GROUPS PRESENT,
INCLUDING NEWLY NUMBERED REGION 8154 (S21E34).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW.
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
THE GEOMAGNETIC FIELD WAS AT UNSETTLED TO ACTIVE LEVELS DURING
08/2100-2400UT, THEN DECLINED TO MOSTLY QUIET LEVELS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN MOSTLY QUIET.
III. Event Probabilities 10 FEB to 12 FEB
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 09 FEB 084 Predicted 10 FEB-12 FEB 084/084/084 90 Day Mean 09 FEB 096
V. Geomagnetic A Indices
OBSERVED AFR/AP 08 FEB 006/007 ESTIMATED AFR/AP 09 FEB 008/008 PREDICTED AFR/AP 10 FEB-12 FEB 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 10 FEB to 12 FEB
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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