Joint USAF/NOAA Report of Solar and Geophysical Activity 30 Apr 2009

Product: Report of Solar-Geophysical Activity
Issued: 2009 Apr 30 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 120 Issued at 2200Z on 30 Apr 2009

IA. Analysis of Solar Active Regions and Activity from 29/2100Z
to 30/2100Z: Solar activity was very low. Region 1016 (S07W79)
produced isolated A-class flares as it neared the west limb.

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

IIA. Geophysical Activity Summary 29/2100Z to 30/2100Z:
Geomagnetic field activity was at quiet levels.

IIB. Geophysical Activity Forecast: Geomagnetic field activity is
expected to be at quiet levels through the period (01 – 03 May).

III. Event Probabilities 01 May-03 May
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green

IV. Penticton 10.7 cm Flux
Observed 30 Apr 070
Predicted 01 May-03 May 070/070/070
90 Day Mean 30 Apr 070

V. Geomagnetic A Indices
Observed Afr/Ap 29 Apr 003/003
Estimated Afr/Ap 30 Apr 002/005
Predicted Afr/Ap 01 May-03 May 005/005-005/005-005/005

VI. Geomagnetic Activity Probabilities 01 May-03 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