:Product: 0131RSGA.txt
:Issued: 2011 Jan 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 031 Issued at 2200Z on 31 Jan 2011
IA.  Analysis of Solar Active Regions and Activity from  30/2100Z
to 31/2100Z:  Solar activity has been at very low levels for the past
24 hours. Region 1150 (S20E24) showed no significant changes and
remains a D-type group with a beta magnetic classification.
IB.  Solar Activity Forecast:  Solar activity is expected to be very
low with a chance for C-class events for the next three days (01-03
February).
IIA.  Geophysical Activity Summary 30/2100Z to 31/2100Z:
The geomagnetic field has been at quiet to unsettled levels for the
past 24 hours.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be at quiet levels on day 1 (01 February). Quiet to
unsettled levels with a chance for active periods is expected on
days 2 and 3 (02-03 February), as a recurrent coronal hole
high-speed stream becomes geoeffective.
III.  Event Probabilities 01 Feb-03 Feb
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       green
IV.  Penticton 10.7 cm Flux
Observed           31 Jan 081
Predicted   01 Feb-03 Feb  082/082/082
90 Day Mean        31 Jan 084
V.  Geomagnetic A Indices
Observed Afr/Ap 30 Jan  002/001
Estimated Afr/Ap 31 Jan  005/005
Predicted Afr/Ap 01 Feb-03 Feb  005/005-008/008-012/012
VI.  Geomagnetic Activity Probabilities 01 Feb-03 Feb
A.  Middle Latitudes
Active                05/15/30
Minor storm           01/05/10
Major-severe storm    01/01/05
B.  High Latitudes
Active                10/20/35
Minor storm           01/10/10
Major-severe storm    01/01/05