:Product: 0331RSGA.txt
:Issued: 2011 Mar 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 090 Issued at 2200Z on 31 Mar 2011
IA.  Analysis of Solar Active Regions and Activity from  30/2100Z
to 31/2100Z:  Solar activity remained at low levels. Region 1176
(S16W51) produced a C2/Sf flare at 31/1535Z. Region 1183 (N15E14)
produced a C1 flare at 31/0202Z. Both regions exhibited gradual
decay during the period. No new regions were assigned.
IB.  Solar Activity Forecast:  Solar activity is expected to be low
during the period (01 - 03 April) with a chance for moderate levels
(isolated M-class).
IIA.  Geophysical Activity Summary 30/2100Z to 31/2100Z:
Geomagnetic activity was at quiet levels.
IIB.  Geophysical Activity Forecast:  Geomagnetic activity is
expected to be at quiet to unsettled levels on day 1 (01 April) due
to possible coronal hole high-speed stream effects. Activity is
expected to decrease to quiet levels during days 2 - 3 (02 - 03
April).
III.  Event Probabilities 01 Apr-03 Apr
Class M    30/30/30
Class X    01/01/01
Proton     01/01/01
PCAF       green
IV.  Penticton 10.7 cm Flux
Observed           31 Mar 113
Predicted   01 Apr-03 Apr  115/115/110
90 Day Mean        31 Mar 098
V.  Geomagnetic A Indices
Observed Afr/Ap 30 Mar  004/005
Estimated Afr/Ap 31 Mar  003/005
Predicted Afr/Ap 01 Apr-03 Apr  008/008-005/005-005/005
VI.  Geomagnetic Activity Probabilities 01 Apr-03 Apr
A.  Middle Latitudes
Active                20/10/10
Minor storm           05/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                25/15/15
Minor storm           10/01/01
Major-severe storm    01/01/01