Joint USAF/NOAA Report of Solar and Geophysical Activity 8 May 2009

Product: Report of Solar-Geophysical Activity
Issued: 2009 May 08 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 128 Issued at 2200Z on 08 May 2009

IA. Analysis of Solar Active Regions and Activity from 07/2100Z
to 08/2100Z: Solar activity was very low. No flares were observed
during the past 24 hours. The solar disk remains spotless.

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

IIA. Geophysical Activity Summary 07/2100Z to 08/2100Z:
The geomagnetic field was quiet to active, with active periods from
0000 to 0900 UTC. Solar wind velocities declined from 520 to 460
km/s during the period.

IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be quiet to unsettled with isolated periods of active
conditions on day 1 (May 09) and quiet to unsettled for days 2 and 3
(May 10-11).

III. Event Probabilities 09 May-11 May
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green

IV. Penticton 10.7 cm Flux
Observed 08 May 071
Predicted 09 May-11 May 072/072/072
90 Day Mean 08 May 069

V. Geomagnetic A Indices
Observed Afr/Ap 07 May 007/010
Estimated Afr/Ap 08 May 010/010
Predicted Afr/Ap 09 May-11 May 007/008-005/005-005/005

VI. Geomagnetic Activity Probabilities 09 May-11 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