Viewing archive of Saturday, 12 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 12 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 102 Issued at 2200Z on 12 APR 1997IA. Analysis of Solar Active Regions and Activity from 11-2100Z to 12-2100Z SOLAR ACTIVITY REMAINED VERY LOW. A REGION EMERGED AT A
MODERATE PACE NEAR S30W36 AND WAS NUMBERED AS NEW REGION 8031.
IB. Solar Activity Forecast
SOLAR ACTIVITY SHOULD REMAIN AT A VERY
LOW LEVEL FOR THE NEXT THREE DAYS. IF GROWTH CONTINUES IN NEW REGION
8031, IT COULD PRODUCE AN ISOLATED C-CLASS FLARE.
IIA. Geophysical Activity Summary 11-2100Z to 12-2100Z
THE GEOMAGNETIC FIELD WAS UNSETTLED TO ACTIVE FOR THE FIRST PART OF
THE PERIOD. AFTER 12/0300Z THE FIELD WAS PREDOMINANTLY QUIET TO
UNSETTLED. RECENT SOLAR WIND DATA INDICATE THE MAGNETIC CLOUD HAS
PASSED THE EARTH.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
FORECAST TO BE QUIET TO UNSETTLED FOR THE NEXT THREE DAYS. PREVIOUS
FORECASTS OF A CORONAL HOLE RELATED DISTURBANCE DURING THIS PERIOD
ARE NOT WARRANTED BASED UPON RECENT CORONAL HOLE IMAGERY.
III. Event Probabilities 13 APR to 15 APR
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 12 APR 076 Predicted 13 APR-15 APR 077/078/076 90 Day Mean 12 APR 074
V. Geomagnetic A Indices
OBSERVED AFR/AP 11 APR 032/038 ESTIMATED AFR/AP 12 APR 011/011 PREDICTED AFR/AP 13 APR-15 APR 008/008-008/008-008/008
VI. Geomagnetic Activity Probabilities 13 APR to 15 APR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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