Viewing archive of Saturday, 19 April 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 Apr 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 109 Issued at 2200Z on 19 APR 1997IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z SOLAR ACTIVITY WAS VERY LOW. NO FLARES OCCURRED. REGION
8032 (S24W49) HAS DECAYED INTO A SPOTLESS PLAGE AND NEW REGION 8034
(N21W16), A SINGLE SPOT 'AXX' ALPHA GROUP WAS NUMBERED TODAY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW.
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
THE GEOMAGNETIC FIELD HAS BEEN MOSTLY QUIET TO UNSETTLED FOR THE PAST
24 HOURS, WITH A SINGLE PERIOD OF ACTIVE CONDITIONS RECORDED AT HIGH
LATITUDES DURING THE INTERVAL 19/0600-0900Z. THE GREATER THAN 2 MEV
ELECTRON FLUX HAS BEEN MODERATE TO HIGH.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE MOSTLY UNSETTLED FOR THE NEXT THREE DAYS, WITH AN
INCREASED CHANCE FOR ISOLATED PERIODS OF ACTIVE CONDITIONS ON DAY
THREE.
III. Event Probabilities 20 APR to 22 APR
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 19 APR 070 Predicted 20 APR-22 APR 071/071/071 90 Day Mean 19 APR 074
V. Geomagnetic A Indices
OBSERVED AFR/AP 18 APR 014/016 ESTIMATED AFR/AP 19 APR 012/010 PREDICTED AFR/AP 20 APR-22 APR 010/008-010/010-015/015
VI. Geomagnetic Activity Probabilities 20 APR to 22 APR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 30% |
| Minor storm | 05% | 10% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 30% |
| Minor storm | 10% | 10% | 15% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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