Viewing archive of Tuesday, 10 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 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 041 Issued at 2200Z on 10 FEB 1998IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z SOLAR ACTIVITY WAS VERY LOW. A SINGLE OPTICALLY
UNCORRELATED B-CLASS X-RAY BURST OCCURRED. A PARTIAL-HALO CORONAL
MASS EJECTION (CME) WAS SEEN DEPARTING THE EAST LIMB BEGINNING
10/0155UT. THE CME APPEARED TO BE MOSTLY EASTWARDLY-DIRECTED AND WAS
SLIGHTLY INCLINED TO THE ECLIPTIC. THERE WAS NO OBVIOUS SOURCE FOR
THE CME EVENT. NEW REGIONS 8155 (S14E04) AND 8156 (S24E70) WERE
NUMBERED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW. THERE IS ALSO A SMALL CHANCE FOR AN ISOLATED C-CLASS FLARE.
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
THE GEOMAGNETIC FIELD HAS BEEN AT QUIET TO UNSETTLED LEVELS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 11 FEB to 13 FEB
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 10 FEB 084 Predicted 11 FEB-13 FEB 084/084/084 90 Day Mean 10 FEB 096
V. Geomagnetic A Indices
OBSERVED AFR/AP 09 FEB 007/008 ESTIMATED AFR/AP 10 FEB 007/008 PREDICTED AFR/AP 11 FEB-13 FEB 007/005-007/005-007/005
VI. Geomagnetic Activity Probabilities 11 FEB to 13 FEB
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 15% |
| Minor storm | 05% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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