Viewing archive of Thursday, 24 April 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 Apr 24 2203 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 115 Issued at 2200Z on 24 Apr 2008

IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z

Solar activity was very low.
IB. Solar Activity Forecast
Solar activity is expected to be very low.
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The geomagnetic field was at unsettled to active conditions due to the continued influence of the recurrent coronal hole high speed stream. Solar wind speeds, as measured from the ACE spacecraft, remain around 600 km/s. The greater than 2 MeV electron flux at geosynchronous orbit was at high levels.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be unsettled with isolated active periods for 25 April. Predominantly quiet conditions are expected for 26-27 April.
III. Event Probabilities 25 Apr to 27 Apr
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFGreen
IV. Penticton 10.7 cm Flux
  Observed       24 Apr 070
  Predicted   25 Apr-27 Apr  070/070/070
  90 Day Mean        24 Apr 072
V. Geomagnetic A Indices
  Observed Afr/Ap 23 Apr  017/032
  Estimated     Afr/Ap 24 Apr  015/022
  Predicted    Afr/Ap 25 Apr-27 Apr  010/012-005/008-005/005
VI. Geomagnetic Activity Probabilities 25 Apr to 27 Apr
A. Middle Latitudes
Active25%10%10%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active30%10%10%
Minor storm10%05%05%
Major-severe storm01%01%01%

All times in UTC

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