Viewing archive of Friday, 20 September 1996
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 1996 Sep 20 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 264 Issued at 2200Z on 20 SEP 1996IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z SOLAR ACTIVITY WAS VERY LOW. THERE WAS NO SOLAR
ACTIVITY OF NOTE, EXCEPT THE DISAPPEARANCE OF A SMALL FILAMENT
IN THE SOUTHEASTERN QUADRANT.THE DISK REMAINS SPOTLESS.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE
VERY LOW FOR THE ENTIRE FORECAST PERIOD.
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
THE GEOMAGNETIC FIELD HAS BEEN AT UNSETTLED TO MINOR STORM.
RECENT SOLAR WIND DATA INDICATES A LOW DENSITY, HIGH SPEED
SOLAR WIND STREAM. ENERGETIC ELECTRON FLUXES AT GEOSYNCHRONOUS
ALTITUDE WERE MODERATE TO HIGH. THE ELECTRON FLUX CROSSED
ALERT THRESHHOLD AT 20/1420Z.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE UNSETTLED TO ACTIVE FOR THE ENTIRE FORECAST
PERIOD.
III. Event Probabilities 21 SEP to 23 SEP
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 20 SEP 069 Predicted 21 SEP-23 SEP 070/070/072 90 Day Mean 20 SEP 071
V. Geomagnetic A Indices
OBSERVED AFR/AP 19 SEP 012/012 ESTIMATED AFR/AP 20 SEP 031/030 PREDICTED AFR/AP 21 SEP-23 SEP 015/015-015/015-015/015
VI. Geomagnetic Activity Probabilities 21 SEP to 23 SEP
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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