Viewing archive of Tuesday, 25 April 2000

Solar activity report

Report of Solar-Geophysical Activity 2000 Apr 25 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 116 Issued at 2200Z on 25 APR 2000

IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z

SOLAR ACTIVITY CONTINUED LOW. MOST OF THE ACTIVITY ORIGINATED IN REGION 8972 (N34W47). REGIONS 8970 (S15E18) AND 8971 (N18E16) REMAIN IMPRESSIVE IN WHITE LIGHT AND H-ALPHA, BUT AS YET HAVE BEEN LARGELY UNPRODUCTIVE. LITTLE ELSE OF SIGNIFICANCE OCCURRED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW TO MODERATE. AN ISOLATED M-CLASS EVENT MAY ORIGINATE FROM EITHER REGION 8970, 8971 OR 8972. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 24/2100Z TO 25/2100Z: THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE UNSETTLED THROUGHOUT THE PERIOD.
III. Event Probabilities 26 APR to 28 APR
Class M30%30%30%
Class X01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       25 APR 203
  Predicted   26 APR-28 APR  205/205/200
  90 Day Mean        25 APR 186
V. Geomagnetic A Indices
OBSERVED AFR/AP 24 APR  014/021
ESTIMATED AFR/AP 25 APR  005/009
PREDICTED AFR/AP 26 APR-28 APR  010/015-010/012-010/010
VI. Geomagnetic Activity Probabilities 26 APR to 28 APR
A. Middle Latitudes
Active20%20%20%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active30%30%30%
Minor storm05%05%05%
Major-severe storm01%01%01%

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