Report of Solar-Geophysical Activity
Issued: 2009 Apr 13 2200 UTC
Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Weather Prediction Center and the U.S. Air Force.


Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 103 Issued at 2200Z on 13 Apr 2009


IA. Analysis of Solar Active Regions and Activity from 12/2100Z
to 13/2100Z: Solar activity was very low. No flares occurred during
the past 24 hours. The solar disk continues to be void of sunspots.
IB. Solar Activity Forecast: Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 12/2100Z to 13/2100Z:
The geomagnetic field was quiet to unsettled. Solar wind velocity at
ACE showed a steady declining trend with day-end values around 380
km/s. The greater than 2 MeV electron flux at geosynchronous orbit
reached high levels during the past 24 hours.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be quiet for the next three days (14-16 April).
III. Event Probabilities 14 Apr-16 Apr
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 13 Apr 068
Predicted 14 Apr-16 Apr 068/068/068
90 Day Mean 13 Apr 070
V. Geomagnetic A Indices
Observed Afr/Ap 12 Apr 004/008
Estimated Afr/Ap 13 Apr 005/005
Predicted Afr/Ap 14 Apr-16 Apr 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 14 Apr-16 Apr
A. Middle Latitudes
Active 05/05/05
Minor storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 05/05/05
Minor storm 01/01/05
Major-severe storm 01/01/01
 

For current space weather conditions please refer to:

NOAA Space Weather Scale descriptions can be found at www.sec.noaa.gov/NOAAscales