Viewing archive of Saturday, 10 October 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 Oct 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 283 Issued at 2200Z on 10 OCT 1998IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z SOLAR ACTIVITY WAS LOW. TODAY'S LARGEST FLARE WAS A C7
AT 1318Z. THE LOCATION ON THE DISK WAS NOT OBSERVED DUE TO WEATHER
LIMITED OBSERVATIONS. REGION 8350 (N19W38) APPEARED TO BE STABLE
DURING THE PERIOD, BUT THERE IS A SMALL INTRUSION OF LEADER POLARITY
FLUX INTO THE TRAILER PORTION OF THE REGION. THIS PART OF THE GROUP
WAS OBSERVED TO PRODUCE SOME POINT BRIGHTENING ACTIVITY. REGION 8355
(S22E23), THE LARGEST GROUP ON THE DISK (180 MILLIONTHS), WAS STABLE
AND QUIET.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
REGION 8350 SEEMS TO BE LIKELY TO PRODUCE AN OCCASIONAL C-CLASS
FLARE OVER THE NEXT FEW DAYS. THE MAGNETIC FIELD STRUCTURE IN REGION
8355 APPEARS TO BE RELAXING SOMEWHAT: AN OCCASIONAL C-FLARE IS
LIKELY FROM THIS GROUP AND THERE IS A SLIGHT CHANCE FOR AN ISOLATED
M-CLASS EVENT.
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
THE GEOMAGNETIC FIELD WAS MOSTLY QUIET. THERE WAS AN ISOLATED ACTIVE
PERIOD FROM 0300-0600Z. THE GREATER THAN 2 MEV ELECTRON FLUXES
ATTAINED HIGH LEVELS TODAY.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 11 OCT to 13 OCT
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 10 OCT 121 Predicted 11 OCT-13 OCT 125/125/130 90 Day Mean 10 OCT 130
V. Geomagnetic A Indices
OBSERVED AFR/AP 09 OCT 010/016 ESTIMATED AFR/AP 10 OCT 010/010 PREDICTED AFR/AP 11 OCT-13 OCT 005/010-005/010-005/010
VI. Geomagnetic Activity Probabilities 11 OCT to 13 OCT
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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