Joint USAF/NOAA Report of Solar and Geophysical Activity 13 Aug 2009
:Product: Report of Solar-Geophysical Activity
:Issued: 2009 Aug 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 225 Issued at 2200Z on 13 Aug 2009
IA. Analysis of Solar Active Regions and Activity from 12/2100Z
to 13/2100Z: Solar activity was very low. No flares were observed
and the visible disk remained void of spots.
IB. Solar Activity Forecast: Solar activity is expected to be very
low through the period.
IIA. Geophysical Activity Summary 12/2100Z to 13/2100Z:
Geomagnetic field activity was at quiet levels through most of the
period. ACE solar wind measurements indicated velocities gradually
decreased from 369 to 326 km/sec during the period.
IIB. Geophysical Activity Forecast: Geomagnetic field activity is
expected to be at mostly quiet levels during the period (14 – 16
August).
III. Event Probabilities 14 Aug-16 Aug
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 13 Aug 067
Predicted 14 Aug-16 Aug 067/067/067
90 Day Mean 13 Aug 069
V. Geomagnetic A Indices
Observed Afr/Ap 12 Aug 002/005
Estimated Afr/Ap 13 Aug 006/005
Predicted Afr/Ap 14 Aug-16 Aug 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 14 Aug-16 Aug
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 01/01/01
Major-severe storm 01/01/01