Joint USAF/NOAA Report of Solar and Geophysical Activity 31 Dec 2009

:Product: Report of Solar-Geophysical Activity
:Issued: 2009 Dec 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 365 Issued at 2200Z on 31 Dec 2009
IA. Analysis of Solar Active Regions and Activity from 30/2100Z
to 31/2100Z: Solar activity was very low. Region 1039 (S28W21) grew
in both sunspot count and white light area coverage and produced
several low-level B-flares. This region remains a D-type sunspot
group with a beta magnetic classification.
IB. Solar Activity Forecast: Solar activity is expected to be very
low to low. There is a slight chance of an isolated C-flare and
M-flare from Region 1039.
IIA. Geophysical Activity Summary 30/2100Z to 31/2100Z:
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be quiet for the next three days (01 – 03 January).
III. Event Probabilities 01 Jan-03 Jan
Class M 05/05/05
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 31 Dec 080
Predicted 01 Jan-03 Jan 079/079/079
90 Day Mean 31 Dec 074
V. Geomagnetic A Indices
Observed Afr/Ap 30 Dec 000/000
Estimated Afr/Ap 31 Dec 001/002
Predicted Afr/Ap 01 Jan-03 Jan 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 01 Jan-03 Jan
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