Joint USAF/NOAA Report of Solar and Geophysical Activity 31 July 2010

:Product: Report of Solar-Geophysical Activity
:Issued: 2010 Jul 31 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 212 Issued at 2200Z on 31 Jul 2010
IA. Analysis of Solar Active Regions and Activity from 30/2100Z
to 31/2100Z: Solar activity was very low. Region 1092 (N13E35)
produced several B-class flares, the largest a B7 at 31/1909Z.
IB. Solar Activity Forecast: Solar activity is forecast to be very
low to low, with a chance for a C-class flare for the next 3 days
(01-03 August).
IIA. Geophysical Activity Summary 30/2100Z to 31/2100Z:
The geomagnetic field was quiet. 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
forecast to be mostly quiet for the next 3 days (01-03 August).
III. Event Probabilities 01 Aug-03 Aug
Class M 05/05/05
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 31 Jul 083
Predicted 01 Aug-03 Aug 082/082/082
90 Day Mean 31 Jul 075
V. Geomagnetic A Indices
Observed Afr/Ap 30 Jul 005/007
Estimated Afr/Ap 31 Jul 005/007
Predicted Afr/Ap 01 Aug-03 Aug 005/007-005/006-005/005
VI. Geomagnetic Activity Probabilities 01 Aug-03 Aug
A. Middle Latitudes
Active 35/35/35
Minor storm 05/05/05
Major-severe storm 01/01/01
B. High Latitudes
Active 30/30/30
Minor storm 10/10/10
Major-severe storm 01/01/01