Viewing archive of Tuesday, 28 October 1997
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 1997 Oct 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 301 Issued at 2200Z on 28 OCT 1997IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z SOLAR ACTIVITY WAS LOW. REGION 8100 (S20E55) PRODUCED
BOTH OF THE DAY'S C-CLASS FLARES, A C2/0N AT 0338Z, AND A C5/1F AT
1256Z. THE REGION APPEARS TO BE SIMPLE MAGNETICALLY, CONSISTING OF 9
SPOTS OCCUPYING 130 MILLIONTHS.
IB. Solar Activity Forecast
SOALR ACTIVITY IS EXPECTED TO BE LOW.
REGION 8100 SHOULD CONTINUE TO YIELD THE OCCASIONAL C-CLASS FLARE.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
THE GEOMAGNETIC FIELD VARIED FROM QUIET TO ACTIVE. THE GREATER THAN 2
MEV ELECTRON FLUX AT GEOSYNCHRONOUS ORBIT ATTAINED HIGH LEVELS NEAR
1930Z.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED THROUGHOUT THE INTERVAL.
III. Event Probabilities 29 OCT to 31 OCT
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 28 OCT 086 Predicted 29 OCT-31 OCT 085/085/090 90 Day Mean 28 OCT 087
V. Geomagnetic A Indices
OBSERVED AFR/AP 27 OCT 015/015 ESTIMATED AFR/AP 28 OCT 010/010 PREDICTED AFR/AP 29 OCT-31 OCT 005/010-005/015-005/010
VI. Geomagnetic Activity Probabilities 29 OCT to 31 OCT
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 25% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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