Viewing archive of Sunday, 18 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 18 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 138 Issued at 2200Z on 18 MAY 1997IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z SOLAR ACTIVITY WAS VERY LOW. THERE WAS NO SIGNIFICANT
ACTIVITY. REGION 8040 (N06E28) SHOWED DECENT GROWTH OVER THE PAST 24
HOURS. REGION 8041 (N06E09) DECAYED. THE VISIBLE DISK REMAINED QUIET
AND STABLE.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
VERY LOW FOR THE ENTIRE FORECAST PERIOD.
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
THE GEOMAGNETIC FIELD WAS QUIET AT ALL LATITUDES.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN QUIET WITH ISOLATED PERIODS OF UNSETTLED LEVELS
FOR THE ENTIRE FORECAST PERIOD.
III. Event Probabilities 19 MAY to 21 MAY
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 18 MAY 074 Predicted 19 MAY-21 MAY 074/074/074 90 Day Mean 18 MAY 074
V. Geomagnetic A Indices
OBSERVED AFR/AP 17 MAY 009/012 ESTIMATED AFR/AP 18 MAY 005/010 PREDICTED AFR/AP 19 MAY-21 MAY 010/008-010/008-010/008
VI. Geomagnetic Activity Probabilities 19 MAY to 21 MAY
| 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% |
All times in UTC
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