Viewing archive of Tuesday, 20 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 20 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 172 Issued at 2200Z on 20 JUN 2000IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z SOLAR ACTIVITY HAS BEEN LOW. REGION 9042 (N24W24)
PRODUCED TODAY'S LARGEST EVENT, A C6/1N AT 1928Z WHICH WAS
ACCOMPANIED BY A WEAK TYPE II RADIO SWEEP. THE REGION APPEARED TO BE
DECLINING SLIGHTLY. REGION 9046 (N21E06) CONTINUES TO BE THE LARGEST
GROUP ON THE DISK BUT PRODUCED ONLY A SUBFLARE DURING THE PAST 24
HOURS. REGION 9052 (S26E29) EXHIBITED SLOW GROWTH BUT WAS STABLE.
NEW REGION 9054 (N09E64) ROTATED INTO VIEW TODAY AS A SMALL C-TYPE
GROUP.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
THERE IS A CHANCE FOR AN ISOLATED M-CLASS EVENT FROM REGION 9042 OR
9046 OVER THE NEXT THREE DAYS.
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE PREDOMINANTLY UNSETTLED FOR THE NEXT THREE DAYS.
III. Event Probabilities 21 JUN to 23 JUN
| Class M | 25% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 20 JUN 184 Predicted 21 JUN-23 JUN 185/185/180 90 Day Mean 20 JUN 186
V. Geomagnetic A Indices
OBSERVED AFR/AP 19 JUN 008/009 ESTIMATED AFR/AP 20 JUN 007/010 PREDICTED AFR/AP 21 JUN-23 JUN 010/012-010/015-010/010
VI. Geomagnetic Activity Probabilities 21 JUN to 23 JUN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| 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% |
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