Report of Solar-Geophysical Activity
Issued: 2007 Aug 27 2200 UTC
Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Environment Center and the U.S. Air Force.


Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 239 Issued at 2200Z on 27 Aug 2007


IA. Analysis of Solar Active Regions and Activity from 26/2100Z
to 27/2100Z: Solar activity was very low.
IB. Solar Activity Forecast: Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z:
The geomagnetic field ranged from quiet to active levels. Solar wind
speed increased to approximately 670 km/s due to a coronal hole high
speed stream.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be quiet to unsettled with possible active periods on 28
August due to the coronal hole high speed stream. Quiet to
unsettled conditions are expected on 29 - 30 August.
III. Event Probabilities 28 Aug-30 Aug
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 27 Aug 069
Predicted 28 Aug-30 Aug 070/070/070
90 Day Mean 27 Aug 072
V. Geomagnetic A Indices
Observed Afr/Ap 26 Aug 010/010
Estimated Afr/Ap 27 Aug 008/015
Predicted Afr/Ap 28 Aug-30 Aug 008/008-005/005-005/005
VI. Geomagnetic Activity Probabilities 28 Aug-30 Aug
A. Middle Latitudes
Active 15/10/10
Minor storm 05/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 20/15/15
Minor storm 05/05/05
Major-severe storm 01/01/01
 

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