Related:
Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Weather Prediction Center and the U.S. Air Force.
Updated 2009 Aug 31 2201 UTC
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 243 Issued at 2200Z on 31 Aug 2009
IA. Analysis of Solar Active Regions and Activity from 30/2100Z
to 31/2100Z: Solar activity was very low. New Region 1025 (N17E33)
was assigned today. No flares were observed.
IB. Solar Activity Forecast: Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 30/2100Z to 31/2100Z:
The geomagnetic field was quiet to unsettled. The unsettled
conditions were due to a coronal hole high speed stream.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be quiet on days 1 and 2 (1 - 2 September). Day 3 (3
September) is expected to increase to quiet to unsettled levels due
to a recurrent coronal hole high speed stream.
III. Event Probabilities 01 Sep-03 Sep
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green
IV. Penticton 10.7 cm Flux
Observed 31 Aug 068
Predicted 01 Sep-03 Sep 068/068/068
90 Day Mean 31 Aug 068
V. Geomagnetic A Indices
Observed Afr/Ap 30 Aug 012/019
Estimated Afr/Ap 31 Aug 007/007
Predicted Afr/Ap 01 Sep-03 Sep 005/005-005/005-008/010
VI. Geomagnetic Activity Probabilities 01 Sep-03 Sep
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
