Viewing archive of Thursday, 19 April 2007

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 2007 Apr 19 2203 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 109 Issued at 2200Z on 19 Apr 2007

IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z

Solar activity was very low. No flares were observed during the past 24 hours, and the visible disk was spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very low.
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic field was quiet to unsettled.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to range from quiet to active for the next three days (20-22 April). Isolated minor storm conditions are possible at high latitudes on 20 April due to a favorably positioned coronal hole.
III. Event Probabilities 20 Apr to 22 Apr
Class M01%01%01%
Class X01%01%01%
Proton01%01%01%
PCAFGreen
IV. Penticton 10.7 cm Flux
  Observed       19 Apr 068
  Predicted   20 Apr-22 Apr  070/070/070
  90 Day Mean        19 Apr 075
V. Geomagnetic A Indices
  Observed Afr/Ap 18 Apr  006/009
  Estimated     Afr/Ap 19 Apr  008/010
  Predicted    Afr/Ap 20 Apr-22 Apr  015/015-008/010-008/008
VI. Geomagnetic Activity Probabilities 20 Apr to 22 Apr
A. Middle Latitudes
Active30%25%20%
Minor storm20%10%05%
Major-severe storm05%01%01%
B. High Latitudes
Active35%30%25%
Minor storm25%15%10%
Major-severe storm10%05%01%

All times in UTC

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