Viewing archive of Sunday, 15 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 15 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 046 Issued at 2200Z on 15 FEB 1998IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z SOLAR ACTIVITY WAS LOW. REGION 8156 (S25E04) GENERATED
SEVERAL SMALL FLARES. ONE OF THE MORE INTERESTING WAS A C1/SF AT
15/0424Z WHICH WAS ACCOMPANIED BY A 2695 MHZ RADIO BURST OF 190 SFU.
THIS REGION HAS GROWN A LITTLE SINCE YESTERDAY BUT APPEARS TO BE
MATURING. NEW REGION 8160 (N23E36) WAS NUMBERED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
ADDITIONAL C-CLASS FLARES ARE PROBABLE IN REGION 8156. LOW-LEVEL
M-CLASS ACTIVITY IS POSSIBLE.
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. THE GREATER THAN 2 MEV
ELECTRON FLUX AT GEOSYNCHRONOUS ALTITUDE WAS MODERATE TO HIGH.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 16 FEB to 18 FEB
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 15 FEB 107 Predicted 16 FEB-18 FEB 110/110/105 90 Day Mean 15 FEB 096
V. Geomagnetic A Indices
OBSERVED AFR/AP 14 FEB 004/005 ESTIMATED AFR/AP 15 FEB 004/005 PREDICTED AFR/AP 16 FEB-18 FEB 005/012-005/005-005/008
VI. Geomagnetic Activity Probabilities 16 FEB to 18 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% |
All times in UTC
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