Viewing archive of Thursday, 19 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 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 050 Issued at 2200Z on 19 FEB 1998IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z SOLAR ACTIVITY WAS LOW, WITH REGION 8156 (S25W47)
GENERATING A SINGLE C1/SF FLARE DURING THE PAST 24 HOURS.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW,
WITH THE CONTINUED CHANCE FOR C-CLASS ACTIVITY FROM REGION 8156.
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
THE GEOMAGNETIC FIELD HAS BEEN MOSTLY QUIET AT ALL LATITUDES FOR THE
PAST 24 HOURS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN MOSTLY QUIET FOR THE NEXT THREE DAYS.
III. Event Probabilities 20 FEB to 22 FEB
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 19 FEB 099 Predicted 20 FEB-22 FEB 097/095/095 90 Day Mean 19 FEB 097
V. Geomagnetic A Indices
OBSERVED AFR/AP 18 FEB 015/026 ESTIMATED AFR/AP 19 FEB 005/007 PREDICTED AFR/AP 20 FEB-22 FEB 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 20 FEB to 22 FEB
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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