Viewing archive of Sunday, 11 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 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 011 Issued at 2200Z on 11 JAN 1998IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z SOLAR ACTIVITY WAS VERY LOW. ISOLATED B-CLASS X-RAY
FLARES OCCURRED. A NEW REGION EMERGED JUST TO THE NORTHWEST OF
REGION 8131 (S24E10) AND WAS NUMBERED AS 8132 (S18E03). BOTH REGIONS
WERE STABLE DURING THE PERIOD. NEW REGIONS 8133 (N04E24) AND 8134
(N15E73) WERE ALSO NUMBERED. SPACE-BASED CORONAGRAPH IMAGERY
INDICATED A CORONAL MASS EJECTION (CME) DEPARTED THE WEST LIMB
AROUND 10/2200UT. THE CME WAS SLIGHTLY INCLINED TO THE ECLIPTIC AND
APPEARED TO BE MOSTLY WESTWARD DIRECTED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW TO LOW. REGIONS 8131 AND 8132 MAY PRODUCE ISOLATED C-CLASS
FLARES.
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
THE GEOMAGNETIC FIELD HAS BEEN MOSTLY QUIET WITH ISOLATED UNSETTLED
PERIODS OBSERVED AT MIDDLE AND HIGH LATITUDES. THE GREATER THAN 2
MEV ELECTRON FLUX DECLINED TO MODERATE LEVELS EARLY IN THE PERIOD.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN AT MOSTLY QUIET LEVELS. THE GREATER THAN 2 MEV
ELECTRON FLUX IS EXPECTED TO CONTINUE TO DECLINE.
III. Event Probabilities 12 JAN to 14 JAN
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 11 JAN 085 Predicted 12 JAN-14 JAN 086/086/086 90 Day Mean 11 JAN 095
V. Geomagnetic A Indices
OBSERVED AFR/AP 10 JAN 007/006 ESTIMATED AFR/AP 11 JAN 007/008 PREDICTED AFR/AP 12 JAN-14 JAN 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 12 JAN to 14 JAN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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