Joint USAF/NOAA Report of Solar and Geophysical Activity 18 December 2010

:Product: Report of Solar-Geophysical Activity
:Issued: 2010 Dec 18 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 352 Issued at 2200Z on 18 Dec 2010
IA. Analysis of Solar Active Regions and Activity from 17/2100Z
to 18/2100Z: Solar activity was very low. Region 1135 (N19W11) is
spotless today. No significant events were observed during the
period.
IB. Solar Activity Forecast: Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 17/2100Z to 18/2100Z:
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be at quiet to unsettled levels for days one and two
(19-20 December) due to the influence of a coronal hole high speed
stream. Quiet conditions are expected for day three (21 December).
III. Event Probabilities 19 Dec-21 Dec
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 18 Dec 081
Predicted 19 Dec-21 Dec 080/078/078
90 Day Mean 18 Dec 083
V. Geomagnetic A Indices
Observed Afr/Ap 17 Dec 002/003
Estimated Afr/Ap 18 Dec 002/005
Predicted Afr/Ap 19 Dec-21 Dec 007/008-007/008-005/005
VI. Geomagnetic Activity Probabilities 19 Dec-21 Dec
A. Middle Latitudes
Active 10/10/05
Minor storm 01/01/01
Major-severe storm 01/01/00
B. High Latitudes
Active 15/15/05
Minor storm 05/05/01
Major-severe storm 01/01/01