Viewing archive of Friday, 30 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 30 2201 UTC
Prepared by the NOAA © SWPC and processed by

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 120 Issued at 2200Z on 30 Apr 2010

IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z

Solar activity was low. Region 1064 (N15E28) was numbered today and produced a B1 flare at 30/0021Z. The GOES-14 imagery observed a C2 x-ray flare at 30/1934Z. The source of this event was located just beyond the NE limb of the sun.
IB. Solar Activity Forecast
Solar activity is expected to be very low to low. There is a slight chance for a C-class flare from the active area approaching the NE limb.
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be quiet for days one and two (01-02 May). Quiet to unsettled levels, with isolated active conditions, are expected on day three (03 May) as a recurrent coronal hole high speed stream becomes geoeffective.
III. Event Probabilities 01 May to 03 May
Class M01%01%01%
Class X01%01%01%
IV. Penticton 10.7 cm Flux
  Observed       30 Apr 079
  Predicted   01 May-03 May  079/079/079
  90 Day Mean        30 Apr 081
V. Geomagnetic A Indices
  Observed Afr/Ap 29 Apr  004/006
  Estimated     Afr/Ap 30 Apr  005/005
  Predicted    Afr/Ap 01 May-03 May  005/005-005/005-007/008
VI. Geomagnetic Activity Probabilities 01 May to 03 May
A. Middle Latitudes
Minor storm01%01%05%
Major-severe storm01%01%01%
B. High Latitudes
Minor storm01%01%05%
Major-severe storm01%01%01%

All times in UTC

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