Viewing archive of Friday, 9 April 2010

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 2010 Apr 09 2201 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 099 Issued at 2200Z on 09 Apr 2010

IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z

Solar activity was very low. Although spotless, Region 1060 (N25W13) did produce a B3/sf event at 09/0455Z. Region 1061 (N13W69) continues to decay and is currently a H-type spot group.
IB. Solar Activity Forecast
Solar activity is expected to be very low.
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
The geomagnetic field was quiet to unsettled. The solar wind observed at the ACE spacecraft indicates a continued decline in solar wind speed averaging 440 km/s. The greater than 2MeV electrons at geosynchronous orbit reached very high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet for days one and two (10-11 April). Quiet to unsettled conditions, with isolated active periods, are expected for day three (12 April). This activity is expected due to the full halo CME observed on 08 April.
III. Event Probabilities 10 Apr to 12 Apr
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       09 Apr 076
  Predicted   10 Apr-12 Apr  075/075/075
  90 Day Mean        09 Apr 082
V. Geomagnetic A Indices
  Observed Afr/Ap 08 Apr  009/011
  Estimated     Afr/Ap 09 Apr  006/008
  Predicted    Afr/Ap 10 Apr-12 Apr  005/005-005/005-010/012
VI. Geomagnetic Activity Probabilities 10 Apr to 12 Apr
A. Middle Latitudes
Active01%01%15%
Minor storm01%01%05%
Major-severe storm01%01%01%
B. High Latitudes
Active01%01%25%
Minor storm01%01%10%
Major-severe storm01%01%01%

All times in UTC

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