Viewing archive of Thursday, 26 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 26 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 057 Issued at 2200Z on 26 FEB 1998IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z SOLAR ACTIVITY WAS VERY LOW. REGION 8167 (S26W09)
PRODUCED A B7/SF WITH SEVERAL ERUPTIVE CENTERS AT 26/1554Z. REGION
8164 (N16W25), CURRENTLY THE LARGEST REGION ON THE VISIBLE DISK,
REMAINED QUIET WITH AN 18 SPOT DAI BETA MAG CLASS. REMAINING REGIONS
WERE STABLE.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW TO LOW. THOUGH QUIET FOR THE PAST 24 HOURS, REGION 8164
MAINTAINS POTENTIAL FOR C-CLASS ACTIVITY.
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN QUIET FOR THE NEXT 24 HOURS. MOSTLY QUIET TO
UNSETTLED CONDITIONS ARE EXPECTED FOR THE REMAINDER OF THE PERIOD
WITH A SMALL CHANCE FOR ACTIVE PERIODS LATE ON THE 27TH THROUGH
28TH.
III. Event Probabilities 27 FEB to 01 MAR
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 26 FEB 093 Predicted 27 FEB-01 MAR 093/092/090 90 Day Mean 26 FEB 096
V. Geomagnetic A Indices
OBSERVED AFR/AP 25 FEB 001/004 ESTIMATED AFR/AP 26 FEB 002/005 PREDICTED AFR/AP 27 FEB-01 MAR 005/008-010/010-008/008
VI. Geomagnetic Activity Probabilities 27 FEB to 01 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 20% |
| Minor storm | 01% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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