:Product: Report of Solar-Geophysical Activity
:Issued: 2010 Jun 02 2201 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 153 Issued at 2200Z on 02 Jun 2010
IA.  Analysis of Solar Active Regions and Activity from  01/2100Z
to 02/2100Z:  Solar activity has been at very low levels for the past
24 hours. Region 1076 (S21W21) has grown in area, sunspot number,
and is magnetically classified as a Beta.
IB.  Solar Activity Forecast:  Solar activity is expected to remain
at very low levels with a slight chance for C-class events for the
next three days (03-05 June).
IIA.  Geophysical Activity Summary 01/2100Z to 02/2100Z:
The geomagnetic field has been at quiet to unsettled levels for the
past 24 hours. The ACE spacecraft observations show the continued
presence and of a coronal hole high-speed stream. Throughout the
period, solar wind speeds have decreased from 550 km/s to 427 km/s.
The greater than 2 MeV electron flux at geosynchronous orbit was at
high levels.
IIB.  Geophysical Activity Forecast:  The geomagnetic field is
expected to be at quiet to unsettled levels with a chance for isolated
active periods for the next three days (03 - 05 June).  Activity on
day one and day two (03-04 June) is due to a recurrent coronal hole
high-speed stream. On day three (05 June), the expected geomagnetic
activity is due to the arrival of the CME observed on May 31/2134Z.
III.  Event Probabilities 03 Jun-05 Jun
Class M    01/01/01
Class X    01/01/01
Proton     01/01/01
PCAF       Green
IV.  Penticton 10.7 cm Flux
Observed           02 Jun 074
Predicted   03 Jun-05 Jun  074/073/072
90 Day Mean        02 Jun 077
V.  Geomagnetic A Indices
Observed Afr/Ap 01 Jun  010/012
Estimated Afr/Ap 02 Jun  006/010
Predicted Afr/Ap 03 Jun-05 Jun  008/008-007/008-007/005
VI.  Geomagnetic Activity Probabilities 03 Jun-05 Jun
A.  Middle Latitudes
Active                20/20/20
Minor storm           05/05/05
Major-severe storm    01/01/01
B.  High Latitudes
Active                25/25/25
Minor storm           05/05/05
Major-severe storm    01/01/01