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OK0NAG > SOLAR 25.11.08 23:04l 77 Lines 3156 Bytes #999 (0) @ EU
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Subj: Report of Solar Geophysical Activity (RSGA)
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Date: Tue, 25 Nov 2008 22:02:09 -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 Nov 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 330 Issued at 2200Z on 25 Nov 2008
IA. Analysis of Solar Active Regions and Activity from 24/2100Z
to 25/2100Z: Solar activity was very low. No flares were observed
during the past 24 hours. 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:
The geomagnetic field was predominantly unsettled. Solar wind
observations from the ACE spacecraft indicated the onset of a
recurrent coronal hole high-speed stream. Solar wind velocities
gradually increased from 285 km/s to 619 km/s during the period. The
interplanetary magnetic field (IMF) Bt reached a peak of 24 nT early
in the period. The IMF Bz ranged from +18 to -15 nT.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be predominantly unsettled with isolated active periods
possible on 26 November. Isolated periods of minor storm conditions
at high latitudes are also possible on 26 November. Quiet to
unsettled conditions are expected on 27 November. Conditions will
return to quiet on 28 November as the coronal hole high speed
subsides.
III. Event Probabilities 26 Nov-28 Nov
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 25 Nov 068
Predicted 26 Nov-28 Nov 069/069/069
90 Day Mean 25 Nov 068
V. Geomagnetic A Indices
Observed Afr/Ap 24 Nov 002/000
Estimated Afr/Ap 25 Nov 012/008
Predicted Afr/Ap 26 Nov-28 Nov 010/012-007/008-005/005
VI. Geomagnetic Activity Probabilities 26 Nov-28 Nov
A. Middle Latitudes
Active 20/15/05
Minor storm 10/05/01
Major-severe storm 01/01/01
B. High Latitudes
Active 25/20/05
Minor storm 15/10/01
Major-severe storm 01/01/01
Thank you for using the Product Subscription Service. If you would like
to remove a product subscription or update the personal information in
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