Solar activity report

Viewing archive of Sunday, 18 May 1997

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 UTC
Prepared 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 1997

IA. 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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