Viewing archive of Wednesday, 21 June 2000
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 2000 Jun 21 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 173 Issued at 2200Z on 21 JUN 2000IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z SOLAR ACTIVITY WAS MODERATE. REGION 9042 (N23W38)
PRODUCED TODAY'S ONLY M-CLASS EVENT, AN M1/SF AT 0929Z. THE REGION
PRODUCED ADDITIONAL, FREQUENT C-CLASS EVENTS, BUT APPEARED TO BE IN
AN OVERALL STATE OF GRADUAL DECLINE. REGION 9046 (N21W07) CONTINUES
TO BE THE LARGEST GROUP ON THE DISK BUT WAS RELATIVELY STABLE.
REGIONS 9050 (S08W48) AND 9052 (S26W52) SHOWED STEADY SLOW GROWTH,
BUT WERE ALSO STABLE. NEW REGIONS 9055 (N19E70) AND 9056 (S15E68)
ROTATED INTO VIEW TODAY AS SIMPLE H-TYPE SUNSPOT GROUPS.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE OVER THE NEXT THREE DAYS. REGIONS 9042 AND 9046 CONTINUE
TO BE THE MOST LIKELY SOURCES FOR POSSIBLE M-CLASS EVENTS.
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
THE GEOMAGNETIC FIELD WAS MOSTLY QUIET DURING THE PAST 24 HOURS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE PREDOMINANTLY UNSETTLED FOR THE NEXT THREE DAYS.
III. Event Probabilities 22 JUN to 24 JUN
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 21 JUN 188 Predicted 22 JUN-24 JUN 185/185/180 90 Day Mean 21 JUN 186
V. Geomagnetic A Indices
OBSERVED AFR/AP 20 JUN 009/009 ESTIMATED AFR/AP 21 JUN 005/007 PREDICTED AFR/AP 22 JUN-24 JUN 010/010-010/015-010/015
VI. Geomagnetic Activity Probabilities 22 JUN to 24 JUN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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