Viewing archive of Wednesday, 25 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 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 056 Issued at 2200Z on 25 FEB 1998IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z SOLAR ACTIVITY WAS VERY LOW. ISOLATED B-CLASS X-RAY
BURSTS OCCURRED WITH NO OPTICAL ASSOCIATIONS. MINOR GROWTH OCCURRED
IN REGION 8164 (N17W12). NEW REGION 8168 (N17W48) WAS NUMBERED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW TO LOW. THERE IS A FAIR CHANCE FOR AN ISOLATED C-CLASS FLARE
FROM REGION 8164.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED WITH A SMALL CHANCE FOR ACTIVE
PERIODS ON 28 FEBRUARY.
III. Event Probabilities 26 FEB to 28 FEB
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 25 FEB 095 Predicted 26 FEB-28 FEB 094/092/090 90 Day Mean 25 FEB 096
V. Geomagnetic A Indices
OBSERVED AFR/AP 24 FEB 002/003 ESTIMATED AFR/AP 25 FEB 002/003 PREDICTED AFR/AP 26 FEB-28 FEB 005/008-008/008-010/012
VI. Geomagnetic Activity Probabilities 26 FEB to 28 FEB
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 20% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 25% |
| Minor storm | 05% | 10% | 15% |
| Major-severe storm | 01% | 01% | 01% |
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