Viewing archive of Wednesday, 10 September 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 Sep 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 253 Issued at 2200Z on 10 SEP 1997IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z SOLAR ACTIVITY WAS LOW. A SINGLE C1 FLARE WAS OBSERVED
DURING THE PAST 24 HOURS, MOSTLY LIKELY ORIGINATING FROM REGION 8084
(N22W01). REGION 8084, A STABLE 22-SPOT 'DSI' BETA GROUP, ALSO
GENERATED FOUR SUBFLARES DURING THE PERIOD. REGION 8083 (S28W35), A
19-SPOT 'DKO' BETA GROUP, PRODUCED A COUPLE OF SUBFLARES WHILE
GROWING IN SIZE BY 30% TO 710 MILLIONTHS. REGION 8085 (S26E27), THE
MOST COMPLEX AND POTENTIALLY SIGNIFICANT REGION ON THE VISIBLE DISK
AS A 24-SPOT 'FKI' BETA-GAMMA GROUP, HAS STOPPED GROWING AT 610
MILLIONTHS AND IS CURRENTLY QUIET.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. THE PROBABILITY OF C-CLASS ACTIVITY FROM ANY OF REGIONS
8083, 8084, AND 8085 REMAINS HIGH. IN ADDITION, REGION 8085 HAS THE
POTENTIAL TO GENERATE LOW TO MID-LEVEL M-CLASS ACTIVITY.
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
THE GEOMAGNETIC FIELD HAS BEEN MOSTLY UNSETTLED AT ALL LATITUDES FOR
THE PAST 24 HOURS. THE GREATER THAN 2 MEV ELECTRON FLUX ALTERNATED
BETWEEN NORMAL AND HIGH.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE MOSTLY UNSETTLED FOR THE NEXT 2 DAYS, WITH THE
POTENTIAL FOR ACTIVE CONDITIONS AND ISOLATED PERIODS OF MINOR
STORMING ON DAY 3 IN RESPONSE TO YESTERDAY'S HALO MASS EJECTION THAT
ACCOMPANIED THE M1 FLARE FROM REGION 8083.
III. Event Probabilities 11 SEP to 13 SEP
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 10 SEP 115 Predicted 11 SEP-13 SEP 115/115/115 90 Day Mean 10 SEP 077
V. Geomagnetic A Indices
OBSERVED AFR/AP 09 SEP 019/019 ESTIMATED AFR/AP 10 SEP 017/015 PREDICTED AFR/AP 11 SEP-13 SEP 015/012-015/008-015/008
VI. Geomagnetic Activity Probabilities 11 SEP to 13 SEP
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 30% |
| Minor storm | 10% | 10% | 15% |
| Major-severe storm | 01% | 01% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 20% | 30% |
| Minor storm | 10% | 15% | 20% |
| Major-severe storm | 01% | 01% | 05% |
All times in UTC
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