Viewing archive of Monday, 26 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 26 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 146 Issued at 2200Z on 26 MAY 1997IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z SOLAR ACTIVITY HAS BEEN VERY LOW. OCCASIONAL LOW-LEVEL
B-CLASS FLARES WERE OBSERVED DURING THE PERIOD, AS WERE OCCASIONAL
TYPE III RADIO SWEEPS, BUT THERE WERE NO OBVIOUS SOURCE REGIONS FOR
THESE EVENTS. GROUP 8046 (S27E28) CONTINUES TO BE A BIT MORE ACTIVE
THAN THE OTHER TWO SPOTTED REGIONS ON THE DISK AS IT SHOWED
INTERMITTENT BRIGHTENINGS IN H-ALPHA DURING THE DAY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW.
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
THE GEOMAGNETIC FIELD WAS QUIET FROM 25/2100Z UNTIL 26/1000Z WHEN A
WEAK SUDDEN IMPULSE WAS OBSERVED (THE IMPULSE MEASURED 13 NT IN
BOULDER). FROM 26/1000Z-2100Z ACTIVITY HAS BEEN SLIGHTLY ENHANCED,
RUNNING QUIET TO UNSETTLED AT MIDDLE LATITUDES, AND UNSETTLED TO
SLIGHTLY ACTIVE AT HIGH LATITUDES.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE MOSTLY UNSETTLED FOR THE NEXT THREE DAYS.
III. Event Probabilities 27 MAY to 29 MAY
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 26 MAY 080 Predicted 27 MAY-29 MAY 080/080/077 90 Day Mean 26 MAY 074
V. Geomagnetic A Indices
OBSERVED AFR/AP 25 MAY 008/005 ESTIMATED AFR/AP 26 MAY 007/010 PREDICTED AFR/AP 27 MAY-29 MAY 010/008-010/008-010/008
VI. Geomagnetic Activity Probabilities 27 MAY to 29 MAY
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 05% |
| Minor storm | 01% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 05% |
| Minor storm | 01% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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