Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 28 Dec 2009

By SpaceRef Editor
December 28, 2009
Filed under , , ,

:Product: Report of Solar-Geophysical Activity
:Issued: 2009 Dec 28 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 362 Issued at 2200Z on 28 Dec 2009
IA. Analysis of Solar Active Regions and Activity from 27/2100Z
to 28/2100Z: Solar activity was very low. Region 1039 (S28E18) has
shown little change from yesterday and remains a beta group. No
flares were observed during the past 24 hours.
IB. Solar Activity Forecast: Solar activity is expected to be very
low to low. There is a chance for an isolated C-flare from Region
1039.
IIA. Geophysical Activity Summary 27/2100Z to 28/2100Z:
The geomagnetic field was quiet. Observations from the ACE
spacecraft show solar wind velocities average around 335 km/s with
minor fluctuations in the IMF southward component, Bz, from +2/-2
nT.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be predominantly quiet for the next three days (29-31
December).
III. Event Probabilities 29 Dec-31 Dec
Class M 05/05/05
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 28 Dec 076
Predicted 29 Dec-31 Dec 078/078/079
90 Day Mean 28 Dec 074
V. Geomagnetic A Indices
Observed Afr/Ap 27 Dec 001/002
Estimated Afr/Ap 28 Dec 001/005
Predicted Afr/Ap 29 Dec-31 Dec 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 29 Dec-31 Dec
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

SpaceRef staff editor.