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Subj: Report of Solar Geophysical Activity (RSGA)
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Date: Fri, 21 Dec 2007 22:02:17 -0000
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Subject: Report of Solar Geophysical Activity (RSGA)
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:Product: Report of Solar-Geophysical Activity
:Issued: 2007 Dec 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 355 Issued at 2200Z on 21 Dec 2007
IA. Analysis of Solar Active Regions and Activity from 20/2100Z
to 21/2100Z: Solar activity was very low. The visible disk remains
spotless.
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 quiet to unsettled. Solar wind
observations at ACE gradually decreased in velocity from a high of
745 km/s at 20/2128Z to 600 km/s at forecast issue time. 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 to unsettled for the next three days (22-24
December). Isolated active conditions are possible at high
latitudes for days 1 and 2 (22-23 December).
III. Event Probabilities 22 Dec-24 Dec
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 21 Dec 071
Predicted 22 Dec-24 Dec 070/069/069
90 Day Mean 21 Dec 071
V. Geomagnetic A Indices
Observed Afr/Ap 20 Dec 010/012
Estimated Afr/Ap 21 Dec 008/012
Predicted Afr/Ap 22 Dec-24 Dec 008/010-006/008-005/005
VI. Geomagnetic Activity Probabilities 22 Dec-24 Dec
A. Middle Latitudes
Active 15/15/15
Minor storm 05/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 30/20/15
Minor storm 10/05/05
Major-severe storm 05/01/01
Thank you for using the Product Subscription Service. If you would like
to remove a product subscription or update the personal information in
your account, go to: https://pss.swpc.noaa.gov. For problems, contact:
mailto:pss.help@noaa.gov.
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