Joint USAF/NOAA Report of Solar and Geophysical Activity 1 May 2009

Product: Report of Solar-Geophysical Activity
Issued: 2009 May 01 2221 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 121 Issued at 2200Z on 01 May 2009

IA. Analysis of Solar Active Regions and Activity from 30/2100Z
to 01/2100Z: Solar activity was very low. Region 1016 (S07W93)
produced a B2 flare at 01/0858Z as it approached the west limb.
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IB. Solar Activity Forecast: Solar activity is expected to be very
low.

IIA. Geophysical Activity Summary 30/2100Z to 01/2100Z:
Geomagnetic field activity was at quiet levels.

IIB. Geophysical Activity Forecast: Geomagnetic field activity is
expected to be at quiet levels through the forecast period (02 – 04
May).

III. Event Probabilities 02 May-04 May
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green

IV. Penticton 10.7 cm Flux
Observed 01 May 069
Predicted 02 May-04 May 070/070/070
90 Day Mean 01 May 070

V. Geomagnetic A Indices
Observed Afr/Ap 30 Apr 002/003
Estimated Afr/Ap 01 May 003/005
Predicted Afr/Ap 02 May-04 May 005/005-005/005-005/005

VI. Geomagnetic Activity Probabilities 02 May-04 May
A. Middle Latitudes
Active 05/05/05
Minor storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 05/05/05
Minor storm 01/01/01
Major-severe storm 01/01/01