Viewing archive of Friday, 19 April 2013

Solar activity report

Report of Solar-Geophysical Activity 2013 Apr 19 2200 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 2013

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

Solar activity has been at low levels for the past 24 hours. The largest solar event of the period was a C1 event observed at 19/1444Z. There are currently 7 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be low with a slight chance for an M-class flare on days one and two (20 Apr, 21 Apr) and expected to be very low with a chance for a C-class flares and a slight chance for an M-class flare on day three (22 Apr).
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic field has been at quiet levels for the past 24 hours. Solar wind speed, as measured by the ACE spacecraft, reached a peak speed of 325 km/s at 19/1948Z. Total IMF reached 5 nT at 19/2058Z. The maximum southward component of Bz reached -2 nT at 19/1145Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 133 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected to be at quiet levels on days one, two, and three (20 Apr, 21 Apr, 22 Apr).
III. Event Probabilities 20 Apr to 22 Apr
Class M10%10%10%
Class X01%01%01%
Proton01%01%01%
PCAFgreen
IV. Penticton 10.7 cm Flux
  Observed       19 Apr 099
  Predicted   20 Apr-22 Apr 100/100/095
  90 Day Mean        19 Apr 111

V. Geomagnetic A Indices
  Observed Afr/Ap 18 Apr  002/003
  Estimated     Afr/Ap 19 Apr  002/002
  Predicted    Afr/Ap 20 Apr-22 Apr  005/005-004/005-003/005

VI. Geomagnetic Activity Probabilities 20 Apr to 22 Apr
A. Middle Latitudes
Active10%10%10%
Minor storm01%01%01%
Major-severe storm01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm15%15%15%
Major-severe storm10%10%10%

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