Viewing archive of Thursday, 15 January 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 Jan 15 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 015 Issued at 2200Z on 15 JAN 1998IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z SOLAR ACTIVITY WAS MODERATE. REGION 8131 (S23W35)
PRODUCED AN M1/1F FLARE AT 15/1438Z, A C6.8/SF FLARE AT 15/0936, A
C1/SF FLARE AT 15/1312Z, AND A C1/SF FLARE AT 15/1949Z. THIS REGION
ALMOST DOUBLED IN SIZE IN THE PAST 24 HOURS AND IS NOW AN EAI SPOT
GROUP. REGION 8135 (S16E43), THE ONLY OTHER SPOTTED REGION ON THE
VISIBLE DISK, HAS REMAINED SMALL, STABLE, AND QUIET. TWO UNCORELATED
C1 XRAY BURSTS WERE ALSO DETECTED TODAY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
LOW TO MODERATE FOR THE ENTIRE FORECAST PERIOD. REGION 8131 HAS A
GOOD POTENTIAL FOR CONTINUED C-CLASS ACTIVITY AND A FAIR CHANCE OF
PRODUCING ONE OR MORE ISOLATE M-CLASS FLARES. THIS REGION ALSO HAS A
SMALL CHANCE OF PRODUCING X-CLASS ACTIVITY. SPACE-BASED XRAY IMAGERS
INDICATE AT LEAST TWO OTHER POTENTIAL FLARES SOUCES ARE ABOUT TO
ENTER THE VISIBLE DISK ON THE EAST LIMB.
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
THE GEOMAGNETIC FIELD WAS QUIET AT ALL LATITUTDES.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED FOR THE FIRST TWO DAYS OF THE
FORECAST PERIOD, THEN SETTLE DOWN TO QUIET LEVELS. HIGH LATITUDE
STATIONS MAY EXPERIENCE ISOLATED PERIODS OF ACTIVE LEVELS DURING THE
FIRST WO DAYS OF THE FORECAST PERIOD.
III. Event Probabilities 16 JAN to 18 JAN
| Class M | 25% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 15 JAN 098 Predicted 16 JAN-18 JAN 100/102/102 90 Day Mean 15 JAN 095
V. Geomagnetic A Indices
OBSERVED AFR/AP 14 JAN 003/004 ESTIMATED AFR/AP 15 JAN 004/005 PREDICTED AFR/AP 16 JAN-18 JAN 015/010-010/010-005/005
VI. Geomagnetic Activity Probabilities 16 JAN to 18 JAN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 15% | 15% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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