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OK0NAG > SOLAR 23.12.08 23:05l 73 Lines 2927 Bytes #999 (0) @ EU
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Subj: Report of Solar Geophysical Activity (RSGA)
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Date: Tue, 23 Dec 2008 22:02:49 -0000
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Subject: Report of Solar Geophysical Activity (RSGA)
X-asg-orig-subj: Report of Solar Geophysical Activity (RSGA)
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:Product: Report of Solar-Geophysical Activity
:Issued: 2008 Dec 23 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 358 Issued at 2200Z on 23 Dec 2008
IA. Analysis of Solar Active Regions and Activity from 22/2100Z
to 23/2100Z: Solar activity was very low. No flares were observed.
The visible disk was spotless.
IB. Solar Activity Forecast: Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 22/2100Z to 23/2100Z:
Geomagnetic field activity was at quiet to unsettled levels. ACE
solar wind measurements indicated a recurrent coronal hole
high-speed stream began early in the summary period. Solar wind
velocities increased to a high of 579 km/sec at 23/1419Z and
remained elevated during the rest of the period. IMF Bz was variable
in the +07 to -07 nT range with a sustained southward period during
approximately 22/2300Z to 23/0400Z.
IIB. Geophysical Activity Forecast: Geomagnetic field activity is
expected to be at mostly quiet levels throughout the forecast period
(24 - 26 December).
III. Event Probabilities 24 Dec-26 Dec
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 23 Dec 069
Predicted 24 Dec-26 Dec 069/069/069
90 Day Mean 23 Dec 069
V. Geomagnetic A Indices
Observed Afr/Ap 22 Dec 003/004
Estimated Afr/Ap 23 Dec 007/010
Predicted Afr/Ap 24 Dec-26 Dec 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 24 Dec-26 Dec
A. Middle Latitudes
Active 10/10/05
Minor storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 15/15/10
Minor storm 01/01/01
Major-severe storm 01/01/01
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