Viewing archive of Tuesday, 20 June 2000

Solar activity report

Report of Solar-Geophysical Activity 2000 Jun 20 2200 UTC
Prepared 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 2000

IA. 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 FROM 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 M25%25%25%
Class X05%05%05%
Proton05%05%05%
PCAFGREEN
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
Active20%20%20%
Minor storm10%10%10%
Major-severe storm05%05%05%
B. High Latitudes
Active20%20%20%
Minor storm10%10%10%
Major-severe storm05%05%05%

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