Viewing archive of Friday, 23 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 23 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 296 Issued at 2200Z on 23 OCT 1998IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z SOLAR ACTIVITY WAS LOW. REGION 8365 (S27W61) CONTINUED
TO PRODUCE SUBFLARES BUT AT A REDUCED RATE FROM THE LAST TWO DAYS.
GROWTH IN THIS REGION APPEARS TO HAVE STABILIZED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
C-CLASS ACTIVITY IS POSSIBLE IN REGION 8365.
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
THE GEOMAGNETIC FIELD RANGED FROM QUIET TO ACTIVE. THE ACTIVITY
ASSOCIATED WITH THE NORTHERN POLAR CORONAL HOLE APPEARS TO BE
ENDING. THE GREATER THAN 2 MEV ELECTRON FLUX WAS HIGH.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 24 OCT to 26 OCT
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 23 OCT 113 Predicted 24 OCT-26 OCT 112/112/115 90 Day Mean 23 OCT 132
V. Geomagnetic A Indices
OBSERVED AFR/AP 22 OCT 012/018 ESTIMATED AFR/AP 23 OCT 012/015 PREDICTED AFR/AP 24 OCT-26 OCT 010/012-010/010-010/010
VI. Geomagnetic Activity Probabilities 24 OCT to 26 OCT
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| 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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