Viewing archive of Thursday, 22 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 22 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 295 Issued at 2200Z on 22 OCT 1998IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z SOLAR ACTIVITY WAS LOW. REGION 8365 (S26W47) PRODUCED
SEVERAL C-CLASS SUBFLARES. THIS REGION CONTINUES TO GROW AND HAS
ALREADY DEVELOPED INTO A MODERATELY LARGE (300+ MILLIONTHS) E-TYPE
SUNSPOT GROUP.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
C-CLASS ACTIVITY SHOULD CONTINUE IN REGION 8365. THERE IS A CHANCE
OF ISOLATED M-CLASS ACTIVITY IN THIS REGION AS WELL.
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
THE GEOMAGNETIC FIELD REMAINED UNSETTLED TO ACTIVE UNDER THE
INFLUENCE OF A HIGH-SPEED STREAM ASSOCIATED WITH THE NORTHERN POLAR
CORONAL HOLE. THE GREATER THAN 2 MEV ELECTRON FLUX WAS HIGH.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BECOME MOSTLY UNSETTLED TO QUIET WITHIN THE NEXT TWO
DAYS.
III. Event Probabilities 23 OCT to 25 OCT
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 22 OCT 115 Predicted 23 OCT-25 OCT 115/115/115 90 Day Mean 22 OCT 132
V. Geomagnetic A Indices
OBSERVED AFR/AP 21 OCT 016/023 ESTIMATED AFR/AP 22 OCT 016/020 PREDICTED AFR/AP 23 OCT-25 OCT 015/015-010/012-010/010
VI. Geomagnetic Activity Probabilities 23 OCT to 25 OCT
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
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