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Subj: Report of Solar Geophysical Activity (RSGA)
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Date: Mon, 21 Apr 2008 22:01:38 -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 Apr 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 112 Issued at 2200Z on 21 Apr 2008
IA. Analysis of Solar Active Regions and Activity from 20/2100Z
to 21/2100Z: Solar activity was very low. No flares occurred during
the past 24 hours. The solar disk is void of spots.
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 during the past 24 hours.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected be quiet for most of the first day (22 April). However, an
increase to unsettled with a chance for isolated active periods is
expected late on the first day (22 April) or early on the second day
(23 April) with the onset of a high speed solar wind stream.
Unsettled levels with occasional active periods are expected to
persist for the second and third days (23-24 April).
III. Event Probabilities 22 Apr-24 Apr
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 21 Apr 071
Predicted 22 Apr-24 Apr 075/075/075
90 Day Mean 21 Apr 072
V. Geomagnetic A Indices
Observed Afr/Ap 20 Apr 001/004
Estimated Afr/Ap 21 Apr 005/005
Predicted Afr/Ap 22 Apr-24 Apr 008/008-015/015-012/012
VI. Geomagnetic Activity Probabilities 22 Apr-24 Apr
A. Middle Latitudes
Active 25/40/35
Minor storm 10/15/15
Major-severe storm 05/05/05
B. High Latitudes
Active 25/45/40
Minor storm 15/20/20
Major-severe storm 05/10/10
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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