Joint USAF/NOAA Report of Solar and Geophysical Activity 25 Apr 2009

Product: Report of Solar-Geophysical Activity
Issued: 2009 Apr 25 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 115 Issued at 2200Z on 25 Apr 2009

IA. Analysis of Solar Active Regions and Activity from 24/2100Z
to 25/2100Z: Solar activity was very low. No flares were detected.
The visible disk remained spotless.

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

IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z:
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 (26 – 28
April).

III. Event Probabilities 26 Apr-28 Apr
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green

IV. Penticton 10.7 cm Flux
Observed 25 Apr 069
Predicted 26 Apr-28 Apr 070/070/070
90 Day Mean 25 Apr 070

V. Geomagnetic A Indices
Observed Afr/Ap 24 Apr 005/005
Estimated Afr/Ap 25 Apr 002/005
Predicted Afr/Ap 26 Apr-28 Apr 005/005-005/005-005/005

VI. Geomagnetic Activity Probabilities 26 Apr-28 Apr
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