Viewing archive of Monday, 11 August 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 Aug 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 223 Issued at 2200Z on 11 AUG 1997IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z SOLAR ACTIVITY REMAINED LOW. C-CLASS ACTIVITY
PERSISTED, ALTHOUGH THE FREQUENCY OF THE EVENTS DECREASED. THE
LARGEST X-RAY BURST, A C5 AT 0003Z, WAS SEEN IN X-RAY IMAGERY DATA
AS BEING ASSOCIATED WITH A BRIGHTENING IN OLD REGION 8069, NOW
NEARLY 3 DAYS BEYOND WEST LIMB NEAR N21. TWO NEW REGIONS ROTATED
INTO VIEW, 8073 (N14E74) AND 8074 (N26E75). BOTH GROUPS SHOW MATURE
H-TYPE SPOTS. REGION 8073 IS THE APPARENT RETURN OF OLD REGION 8065,
THE SITE OF THREE C-CLASS FLARES ON JULY 25.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW.
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE. NIGHTTIME SUBSTORMS
OCCURRED ON AN OTHERWISE QUIET DAY.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE GENERALLY UNSETTLED, WITH SUBSTORMS LIKELY FOR THE
NEXT FEW DAYS.
III. Event Probabilities 12 AUG to 14 AUG
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 11 AUG 080 Predicted 12 AUG-14 AUG 082/082/084 90 Day Mean 11 AUG 073
V. Geomagnetic A Indices
OBSERVED AFR/AP 10 AUG 008/007 ESTIMATED AFR/AP 11 AUG 010/010 PREDICTED AFR/AP 12 AUG-14 AUG 010/012-010/010-010/010
VI. Geomagnetic Activity Probabilities 12 AUG to 14 AUG
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 40% | 40% | 40% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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