Viewing archive of Wednesday, 27 November 1996
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 1996 Nov 27 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 332 Issued at 2200Z on 27 NOV 1996IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z SOLAR ACTIVITY WAS VERY LOW. A VERY LONG DURATION
B9 X-RAY EVENT OCCURRED BETWEEN 26/2048-27/0456Z. OPTICAL
OBSERVATORIES OBSERVED BRIGHT KNOTS OF MATERIAL FLOWING ABOVE
THE WEST LIMB NEAR N05 WHERE REGION 7997 IS LOCATED. SPACE-BASED
CORONAGRAPH IMAGES NEAR THE PEAK OF THE EVENT SHOWED A LARGE
(GREATER THAN 1 SOLAR DIAMETER) CORONAL MASS EJECTION OVER THE
WEST LIMB. YOHKOH X-RAY IMAGES IN THE DECAY OF THE EVENT SHOWED
A LARGE, POST-CME ARCADE IN THAT LOCATION. REGION 7999 (S05W21)
WAS STABLE AND WEAK MIXED POLARITIES REMAINED IN THE CENTER OF
THE REGION.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS FORECAST TO
BE LOW. REGION 7999 RETAINS THE CAPABILITY OF PRODUCING
C-CLASS AND ISOLATED M-CLASS EVENTS.
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. ISOLATED ACTIVE
CONDITIONS WERE EXPERIENCED IN THE 27/0300-0600Z PERIOD.
SOLAR WIND DATA SHOW A MODERATELY HIGH VELOCITY (500-575
KM/S) STREAM IN THE EARTH'S VICINITY.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
FORECAST TO BE QUIET TO SLIGHTLY UNSETTLED FOR THE NEXT THREE
DAYS. THE CORONAL MASS EJECTION MENTIONED ABOVE IS NOT
EXPECTED TO IMPACT THE EARTH.
III. Event Probabilities 28 NOV to 30 NOV
| Class M | 30% | 20% | 20% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 27 NOV 103 Predicted 28 NOV-30 NOV 100/098/096 90 Day Mean 27 NOV 072
V. Geomagnetic A Indices
OBSERVED AFR/AP 26 NOV 005/004 ESTIMATED AFR/AP 27 NOV 008/005 PREDICTED AFR/AP 28 NOV-30 NOV 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 28 NOV to 30 NOV
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 05% | 05% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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