Viewing archive of Friday, 28 April 2006

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 2006 Apr 28 2203 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 118 Issued at 2200Z on 28 Apr 2006

IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z

Solar activity was low. Region 875 (S11E06) produced a C1 flare at 28/0826Z.
IB. Solar Activity Forecast
Solar activity is expected to be low with a slight chance of M-class activity from Region 875.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic field was quiet to unsettled with one major storm period from 0600 - 0900 UTC following a discontinuity in the solar wind.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet to unsettled for the next three days (29 April - 01 May).
III. Event Probabilities 29 Apr to 01 May
Class M20%20%20%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       28 Apr 100
  Predicted   29 Apr-01 May  100/100/100
  90 Day Mean        28 Apr 080
V. Geomagnetic A Indices
  Observed Afr/Ap 27 Apr  003/005
  Estimated     Afr/Ap 28 Apr  014/015
  Predicted    Afr/Ap 29 Apr-01 May  005/007-005/007-005/007
VI. Geomagnetic Activity Probabilities 29 Apr to 01 May
A. Middle Latitudes
Active10%10%10%
Minor storm01%01%01%
Major-severe storm01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm05%05%05%
Major-severe storm01%01%01%

All times in UTC

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