Viewing archive of Wednesday, 30 July 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 Jul 30 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 211 Issued at 2200Z on 30 JUL 1997IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z SOLAR ACTIVITY WAS VERY LOW. NO SIGNIFICANT FLARES
OCCURRED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW.
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. THE SOHO/LASCO
EXPERIMENT OBSERVED A LARGE (>200 DEGREES) CME EVENT AT ABOUT
30/0830Z. THIS EVENT WAS CORRELATED IN TIME WITH A PARTIAL FILAMENT
DISAPPEARANCE NEAR N45E21, A GOES X-RAY ENHANCEMENT BEGINNING AT
30/0839Z AND PEAKING AT 30/0907Z (A7 PEAK), AND ENHANCED CORONAL
ARCADES BETWEEN REGIONS 8064 (N23W34) AND 8066 (N24E09) SEEN IN
YOHKOH IMAGERY. PARTICLE ENHANCEMENTS OR RADIO SWEEP ACTIVITY WAS
NOT OBSERVED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE MOSTLY QUIET TO UNSETTLED FOR THE FIRST TWO DAYS OF
THE FORECAST PERIOD. UNSETTLED TO ACTIVE CONDITIONS MAY BEGIN ON
AUGUST 2 DUE TO THE CME EVENT MENTIONED ABOVE.
III. Event Probabilities 31 JUL to 02 AUG
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 30 JUL 071 Predicted 31 JUL-02 AUG 070/070/070 90 Day Mean 30 JUL 073
V. Geomagnetic A Indices
OBSERVED AFR/AP 29 JUL 007/003 ESTIMATED AFR/AP 30 JUL 006/008 PREDICTED AFR/AP 31 JUL-02 AUG 005/008-005/008-015/008
VI. Geomagnetic Activity Probabilities 31 JUL to 02 AUG
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 30% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 40% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 05% |
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