Viewing archive of Tuesday, 20 May 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 May 20 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 140 Issued at 2200Z on 20 MAY 1997IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z SOLAR ACTIVITY WAS VERY LOW. THERE WAS NO SIGNIFICANT
FLARE ACTIVITY. THE SPOTTED REGIONS CONTINUED TO SHOW SLOW GROWTH.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW TO LOW. ISOLATED C-CLASS ACTIVITY IS POSSIBLE.
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
THE GEOMAGNETIC FIELD WAS MOSTLY QUIET WITH A SINGLE PERIOD OF
UNSETTLED LEVELS AT MID LATITUDES AT ABOUT 20/0900Z.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE MOSTLY QUIET FOR THE ENTIRE FORECAST PERIOD.
III. Event Probabilities 21 MAY to 23 MAY
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 20 MAY 079 Predicted 21 MAY-23 MAY 080/080/078 90 Day Mean 20 MAY 074
V. Geomagnetic A Indices
OBSERVED AFR/AP 19 MAY 004/004 ESTIMATED AFR/AP 20 MAY 007/008 PREDICTED AFR/AP 21 MAY-23 MAY 005/008-005/008-005/005
VI. Geomagnetic Activity Probabilities 21 MAY to 23 MAY
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
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