Viewing archive of Wednesday, 1 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 01 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 274 Issued at 2200Z on 01 OCT 1997IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 01-2100Z SOLAR ACTIVITY WAS VERY LOW. NO SIGNIFICANT FLARES
OCCURRED. NEW REGION 8091 (N22E72), CURRENTLY A 6-SPOT 'BXO' BETA
GROUP, WAS NUMBERED TODAY. REGION 8091 IS THE RETURN OF OLD REGION
8084, WHICH GENERATED SEVERAL C-CLASS EVENTS AND TWO M-CLASS EVENTS
DURING IT'S INITIAL ROTATION. REGION 8090 (S27E55) REMAINS STABLE AS
A SINGLE SPOT 'HSX' ALPHA.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW TO LOW. BASED ON IT'S PAST HISTORY, REGION 8091 HAS THE
POTENTIAL FOR GROWTH AND MODERATE C-CLASS ACTIVITY.
IIA. Geophysical Activity Summary 30-2100Z to 01-2100Z
THE GEOMAGNETIC FIELD HAS BEEN UNSETTLED TO MAJOR STORM FOR THE PAST
24 HOURS, MOST LIKELY IN RESPONSE TO THE 'HALO' CORONAL MASS
EJECTION DOCUMENTED ON 27 SEPTEMBER. ACTIVITY AT MIDDLE LATITUDES
PEAKED AT MAJOR STORM LEVELS DURING THE 0900-1200Z INTERVAL,
DECREASING TO UNSETTLED THEREAFTER. ACTIVITY AT HIGHER LATITUDES
REMAINED IN THE MINOR TO MAJOR STORM RANGE THROUGH THE 01/1500-1800Z
INTERVAL, BEFORE DROPPING DOWN TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED FOR THE NEXT THREE DAYS, WITH THE
CHANCE FOR ISOLATED PERIODS OF ACTIVE CONDITIONS.
III. Event Probabilities 02 OCT to 04 OCT
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 01 OCT 087 Predicted 02 OCT-04 OCT 090/092/092 90 Day Mean 01 OCT 082
V. Geomagnetic A Indices
OBSERVED AFR/AP 30 SEP 009/007 ESTIMATED AFR/AP 01 OCT 028/045 PREDICTED AFR/AP 02 OCT-04 OCT 010/015-005/010-005/005
VI. Geomagnetic Activity Probabilities 02 OCT to 04 OCT
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 10% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 10% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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