Viewing archive of Sunday, 21 September 2008

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 2008 Sep 21 2201 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 265 Issued at 2200Z on 21 Sep 2008

IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z

Solar activity was very low. No flares were observed during the past 24 hours. The visible disk remained spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very low.
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to remain at quiet levels for the forecast period (22 - 24 September).
III. Event Probabilities 22 Sep to 24 Sep
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFGreen
IV. Penticton 10.7 cm Flux
  Observed       21 Sep 068
  Predicted   22 Sep-24 Sep  067/067/067
  90 Day Mean        21 Sep 066
V. Geomagnetic A Indices
  Observed Afr/Ap 20 Sep  001/003
  Estimated     Afr/Ap 21 Sep  002/005
  Predicted    Afr/Ap 22 Sep-24 Sep  005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 22 Sep to 24 Sep
A. Middle Latitudes
Active10%10%10%
Minor storm01%01%01%
Major-severe storm01%01%01%
B. High Latitudes
Active10%10%10%
Minor storm01%01%01%
Major-severe storm01%01%01%

All times in UTC

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