Viewing archive of Friday, 28 March 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 Mar 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 087 Issued at 2200Z on 28 MAR 1997IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z SOLAR ACTIVITY WAS LOW. TODAY'S SOLE C-CLASS EVENT WAS
CLASS C1 AT 0120Z. THERE WERE NO OBSERVATIONS AVAILABLE TO PINPOINT
THE SOURCE OF THE EVENT. REGION 8026 (S24E59) IS THE ONLY SPOTTED
REGION ON THE DISK AND HAS SHOWN SLOW GROWTH OVER THE PAST 24 HOURS.
THE GROUP HAS NEW CYCLE POLARITY, WITH MAGNETICALLY NEGATIVE LEADERS
AND POSITIVE TRAILERS.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW TO LOW. THERE CONTINUES TO BE A FAIR CHANCE FOR ADDITIONAL,
ISOLATED C-CLASS EVENTS FROM REGION 8026.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED FROM THE BEGINNING OF
THE PERIOD THROUGH ABOUT 28/1400Z, WHEN AN INCREASE IN ACTIVITY
BEGAN. SINCE 1400Z, ACTIVITY RANGED FROM UNSETTLED TO MINOR STORM
CONDITIONS WITH SOME ISOLATED MAJOR STORM PERIODS AT A FEW HIGH
LATITUDE SITES. SOLAR WIND DATA WERE AVAILABLE BRIEFLY DURING THE
DISTURBANCE AND INDICATED ENHANCED DENSITIES (10-15 P/CC), NOMINAL
SPEEDS (400-430 KM/S), AND A SOUTHWARD DIRECTED INTERPLANETARY
MAGNETIC FIELD OF MODERATE STRENGTH (-5 TO -10 NT). THIS SIGNATURE
SUGGESTS THAT THE ACTIVITY WAS CAUSED BY A CORONAL TRANSIENT. THE
GREATER THAN 2 MEV ELECTRON FLUXES WERE AT MODERATE TO HIGH LEVELS
TODAY.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE PREDOMINANTLY UNSETTLED FOR THE NEXT THREE DAYS.
III. Event Probabilities 29 MAR to 31 MAR
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 28 MAR 073 Predicted 29 MAR-31 MAR 074/075/076 90 Day Mean 28 MAR 074
V. Geomagnetic A Indices
OBSERVED AFR/AP 27 MAR 007/006 ESTIMATED AFR/AP 28 MAR 010/010 PREDICTED AFR/AP 29 MAR-31 MAR 010/010-010/010-010/010
VI. Geomagnetic Activity Probabilities 29 MAR to 31 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
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