Viewing archive of Wednesday, 28 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 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 148 Issued at 2200Z on 28 MAY 1997IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z SOLAR ACTIVITY WAS LOW. TODAY'S ONLY C-CLASS EVENT
OCCURRED AT 0342Z: THE OPTICAL COUNTERPART WAS NOT OBSERVED. REGIONS
8046 (S27W01) AND 8047 (N26E55) ARE THE ONLY SPOTTED REGIONS VISIBLE
AS REGION 8045 (N02, WEST LIMB) HAS ROTATED OFF THE DISK. BOTH OF
THESE GROUPS CONSIST OF SMALL SPOTS WITHOUT PENUMBRA.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
THE GEOMAGNETIC FIELD WAS QUIET DURING THE PAST 24 HOURS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED FOR THE NEXT THREE DAYS.
III. Event Probabilities 29 MAY to 31 MAY
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 28 MAY 077 Predicted 29 MAY-31 MAY 077/077/077 90 Day Mean 28 MAY 074
V. Geomagnetic A Indices
OBSERVED AFR/AP 27 MAY 017/021 ESTIMATED AFR/AP 28 MAY 005/007 PREDICTED AFR/AP 29 MAY-31 MAY 008/008-007/008-007/008
VI. Geomagnetic Activity Probabilities 29 MAY to 31 MAY
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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