Report of Solar-Geophysical Activity
Issued: 2008 Aug 21 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 234 Issued at 2200Z on 21 Aug 2008
IA. Analysis of Solar Active Regions and Activity from 20/2100Z
to 21/2100Z: Solar activity was very low.
IB. Solar Activity Forecast: Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 20/2100Z to 21/2100Z:
The geomagnetic field was mostly quiet. The greater than 2 MeV
electron flux at geosynchronous orbit reached high levels today.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be quiet for the next two days (22-23 August) and quiet
to unsettled on day three (24 August).
III. Event Probabilities 22 Aug-24 Aug
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 21 Aug 067
Predicted 22 Aug-24 Aug 066/066/066
90 Day Mean 21 Aug 066
V. Geomagnetic A Indices
Observed Afr/Ap 20 Aug 005/006
Estimated Afr/Ap 21 Aug 005/005
Predicted Afr/Ap 22 Aug-24 Aug 005/005-005/005-007/008
VI. Geomagnetic Activity Probabilities 22 Aug-24 Aug
A. Middle Latitudes
Active 05/05/10
Minor storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 05/05/20
Minor storm 01/01/05
Major-severe storm 01/01/01
For current space weather conditions please refer to:
NOAA Space Weather Scale descriptions can be found at
www.sec.noaa.gov/NOAAscales
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