Report of Solar-Geophysical Activity

Issued: 2012 May 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 152 Issued at 2200Z on 31 May 2012

IA.  Analysis of Solar Active Regions and Activity from  30/2100Z
to 31/2100Z:  Solar activity was low during the past 24 hours. New
Regions 1493 (N15E64) and 1494 (S16E69) were numbered overnight and
have each produced several low-level C-class x-ray events. New
Region 1495 (S12E19) was also numbered today but has not produced
any flare activity as of yet. No Earth-directed CME's were observed
during the period.
IB.  Solar Activity Forecast:  Solar activity is expected to be low
for the next three days (01 - 03 June).
IIA.  Geophysical Activity Summary 30/2100Z to 31/2100Z:
The geomagnetic field was mostly quiet during the past 24 hours.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be mostly quiet on days one and two (01 - 02 June).
Quiet to unsettled conditions with a chance for isolated active
periods are expected late on day three (03 June) due to the
anticipated arrival of a recurrent coronal hole high speed stream.
III.  Event Probabilities 01 Jun-03 Jun
Class M    05/05/05
Class X    01/01/01
Proton     01/01/01
PCAF       green
IV.  Penticton 10.7 cm Flux
Observed           31 May 117
Predicted   01 Jun-03 Jun  120/125/125
90 Day Mean        31 May 117
V.  Geomagnetic A Indices
Observed Afr/Ap 30 May  005/008
Estimated Afr/Ap 31 May  008/010
Predicted Afr/Ap 01 Jun-03 Jun  004/005-004/005-009/010
VI.  Geomagnetic Activity Probabilities 01 Jun-03 Jun
A.  Middle Latitudes
Active                05/05/20
Minor storm           01/01/10
Major-severe storm    01/01/01
B.  High Latitudes
Active                15/15/15
Minor storm           15/15/25
Major-severe storm    05/05/30