Joint USAF/NOAA Report of Solar and Geophysical Activity 23 May 2009

Product: Report of Solar-Geophysical Activity
Issued: 2009 May 23 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 143 Issued at 2200Z on 23 May 2009

IA. Analysis of Solar Active Regions and Activity from 22/2100Z
to 23/2100Z: Solar activity was very low. No flares were observed
during the past 24 hours. New Region 1018 (S33E38) was numbered
during the period. This region formed on the disk and was classified
as a Bxo beta spot group.

IB. Solar Activity Forecast: Solar activity is expected to be very
low.

IIA. Geophysical Activity Summary 22/2100Z to 23/2100Z:
The geomagnetic field was quiet.

IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be predominantly quiet for the next three days (24-26
May).

III. Event Probabilities 24 May-26 May
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green

IV. Penticton 10.7 cm Flux
Observed 23 May 070
Predicted 24 May-26 May 070/070/070
90 Day Mean 23 May 070

V. Geomagnetic A Indices
Observed Afr/Ap 22 May 004/005
Estimated Afr/Ap 23 May 003/005
Predicted Afr/Ap 24 May-26 May 005/005-005/005-005/005

VI. Geomagnetic Activity Probabilities 24 May-26 May
A. Middle Latitudes
Active 05/05/05
Minor storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 10/10/10
Minor storm 01/01/01
Major-severe storm 01/01/01