Viewing archive of Friday, 24 April 2009

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 2009 Apr 24 2201 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 114 Issued at 2200Z on 24 Apr 2009

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

Solar activity was very low. No flares were detected. The visible disk was spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very low.
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
Geomagnetic field activity was at quiet levels. However, a sudden impulse (SI) occurred at approximately 24/0050Z (10 nT, as measured by the Boulder-NOAA magnetometer). There was no obvious source for the SI.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is expected to be at quiet levels through the forecast period (25 - 27 Apr).
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 070
V. Geomagnetic A Indices
  Observed Afr/Ap 23 Apr  000/003
  Estimated     Afr/Ap 24 Apr  004/005
  Predicted    Afr/Ap 25 Apr-27 Apr  005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 25 Apr to 27 Apr
A. Middle Latitudes
Active05%05%05%
Minor storm01%01%01%
Major-severe storm01%01%01%
B. High Latitudes
Active10%05%05%
Minor storm01%01%01%
Major-severe storm01%01%01%

All times in UTC

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