Viewing archive of Thursday, 30 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 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 303 Issued at 2200Z on 30 OCT 1997IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z SOLAR ACTIVITY WAS VERY LOW. FLARES WERE MORE FREQUENT
DURING THE PERIOD, BUT NONE EXCEEDED B-CLASS. REGION 8100 (S19E30)
HAD THE BRUNT OF THE ACTIVITY AS IT GREW IN WHITE LIGHT AND H-ALPHA.
REGION 8099 (N20W03) IS LESS IMPRESSIVE IN H-ALPHA, BUT MORE
MAGNETICALLY COMPLEX THAN 8100. THE LIMBS WERE QUIET.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
REGION 8100 SHOULD BEGIN TO GENERATE C-CLASS ACTIVITY IF ITS GROWTH
CONTINUES.
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
THE GEOMAGNETIC FIELD WAS MOSTLY QUIET TO UNSETTLED, ALTHOUGH WEAK
SUBSTORMS AGAIN BROUGHT SHORT-LIVED ACTIVE CONDITIONS TO HIGH
LATITUDES. THE GREATER THAN 2 MEV ELECTRON FLUX AT GEOSYNCHRONOUS
ORBIT REACHED HIGH LEVELS JUST AFTER 1200Z.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO PERSIST AT QUIET TO UNSETTLED LEVELS THROUGH 02 NOV.
WEAK SUBSTORMS MAY OCCUR DURING LOCAL NIGHTTIMES.
III. Event Probabilities 31 OCT to 02 NOV
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 30 OCT 088 Predicted 31 OCT-02 NOV 090/090/095 90 Day Mean 30 OCT 087
V. Geomagnetic A Indices
OBSERVED AFR/AP 29 OCT 008/010 ESTIMATED AFR/AP 30 OCT 007/010 PREDICTED AFR/AP 31 OCT-02 NOV 010/008-005/008-005/008
VI. Geomagnetic Activity Probabilities 31 OCT to 02 NOV
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 10% | 10% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 20% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
All times in UTC
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