:Product: 0516RSGA.txt
:Issued: 2012 May 16 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 137 Issued at 2200Z on 16 May 2012
IA.  Analysis of Solar Active Regions and Activity from  15/2100Z
to 16/2100Z:  Solar activity was low. Region 1476 (N13W73) produced a
few C-class flares while continuing to decay. Regions 1482 (N13E10)
and 1484 (N09E38) also produced a few low level C-class events. A
pair of CMEs associated with apparent filament eruptions were
observed in LASCO C2/C3, but neither appear to be earth directed.
IB.  Solar Activity Forecast:  Solar activity is expected to be very
low to low for the next 3 days (17-19 May).
IIA.  Geophysical Activity Summary 15/2100Z to 16/2100Z:
The geomagnetic field was mostly quiet. The greater than 2 MeV
electron flux at geosynchronous orbit reached high levels during the
period.
IIB.  Geophysical Activity Forecast:  With the exception of an
isolated unsettled or active period early on day 1 (17 May) from an
expected solar sector boundary crossing, geomagnetic field
conditions are expected to be mostly quiet throughout the period
(17-19 May).
III.  Event Probabilities 17 May-19 May
Class M    10/10/10
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           16 May 131
Predicted   17 May-19 May  130/130/130
90 Day Mean        16 May 115
V.  Geomagnetic A Indices
Observed Afr/Ap 15 May  005/005
Estimated Afr/Ap 16 May  007/008
Predicted Afr/Ap 17 May-19 May  004/005-004/005-004/005
VI.  Geomagnetic Activity Probabilities 17 May-19 May
A.  Middle Latitudes
Active                10/10/10
Minor storm           01/01/01
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor storm           01/01/01
Major-severe storm    01/01/01