Viewing archive of Saturday, 25 September 1999

Solar activity report

Report of Solar-Geophysical Activity 1999 Sep 25 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 268 Issued at 2200Z on 25 SEP 1999

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

SOLAR ACTIVITY WAS VERY LOW. SLIGHT DECAY WAS OBSERVED IN REGION 8708 (S11E18) SINCE YESTERDAY. NO NEW REGIONS WERE NUMBERED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY LOW TO LOW. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 24/2100Z TO 25/2100Z: THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED DURING THE PERIOD.
III. Event Probabilities 26 SEP to 28 SEP
Class M 01%01%01%
Class X 01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       25 SEP 125
  Predicted    26 SEP-28 SEP  120/120/115
  90 Day Mean        25 SEP 161
V. Geomagnetic A Indices
OBSERVED AFR/AP 24 SEP  004/006
ESTIMATED AFR/AP 25 SEP  005/005
PREDICTED AFR/AP 26 SEP-28 SEP  008/005-008/005-008/010
VI. Geomagnetic Activity Probabilities 26 SEP to 28 SEP
A. Middle Latitudes
Active10%10%15%
Minor storm 05%05%05%
Major-severe storm 01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm 10%10%10%
Major-severe storm 01%01%01%

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