Viewing archive of Thursday, 12 March 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 Mar 12 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 071 Issued at 2200Z on 12 MAR 1998IA. Analysis of Solar Active Regions and Activity from 11-2100Z to 12-2100Z SOLAR ACTIVITY WAS LOW. A C1 X-RAY BURST OCCURRED AT
0122Z, BUT WAS NOT OPTICALLY CORRELATED. THE PRIMARY AREA OF
INTEREST ON THE DISK IS THE COMPLEX LOCATED IN THE SOUTHEAST. TWO
NEW REGIONS WERE IDENTIFIED THERE; REGION 8180 (S29E42), JUST SOUTH
OF PRE-EXISTING REGION 8179 (S24E36), AND REGION 8181 (S20E48), A
SMALL BUT SPOTTED GROUP SOUTH OF REGION 8178 (S17E47). THERE HAS
BEEN LITTLE ACTIVITY FROM ANY OF THESE FOUR REGIONS, DESPITE THEIR
CLOSE PROXIMITY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
AN ISOLATED C-CLASS EVENT IS LIKELY IN THE NEXT 24 HOURS.
IIA. Geophysical Activity Summary 11-2100Z to 12-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE. BRIEF PERIODS OF
SUBSTORMING OCCURRED DURING LOCAL NIGHTTIMES. THE GREATER THAN 2 MEV
ELECTRON FLUX AT GEOSYNCHRONOUS ORBIT WAS HIGH.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 13 MAR to 15 MAR
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 12 MAR 102 Predicted 13 MAR-15 MAR 105/105/110 90 Day Mean 12 MAR 094
V. Geomagnetic A Indices
OBSERVED AFR/AP 11 MAR 020/028 ESTIMATED AFR/AP 12 MAR 012/010 PREDICTED AFR/AP 13 MAR-15 MAR 010/008-005/005-005/005
VI. Geomagnetic Activity Probabilities 13 MAR to 15 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 20% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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