Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 11 February 2011

By SpaceRef Editor
February 11, 2011
Filed under , , ,

:Product: Report of Solar-Geophysical Activity
:Issued: 2011 Feb 11 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 042 Issued at 2200Z on 11 Feb 2011
IA. Analysis of Solar Active Regions and Activity from 10/2100Z
to 11/2100Z: Solar activity was very low. Region 1153 produced a B9
flare despite having rotated off the west limb on 09 February. There
are currently four regions on the disk, but all have been mostly
stable and quiet.
IB. Solar Activity Forecast: Solar activity is expected to be very
low with a chance for a C-class flare for the next 3 days (12-14
February).
IIA. Geophysical Activity Summary 10/2100Z to 11/2100Z:
The geomagnetic field was quiet. The greater than 2 MeV electron flux
at geosynchronous orbit reached high levels during the period.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be mostly quiet for the next 3 days (12-14 February).
III. Event Probabilities 12 Feb-14 Feb
Class M 05/05/05
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 11 Feb 091
Predicted 12 Feb-14 Feb 090/090/090
90 Day Mean 11 Feb 084
V. Geomagnetic A Indices
Observed Afr/Ap 10 Feb 004/003
Estimated Afr/Ap 11 Feb 002/002
Predicted Afr/Ap 12 Feb-14 Feb 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 12 Feb-14 Feb
A. Middle Latitudes
Active 20/20/20
Minor storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 20/20/20
Minor storm 01/01/01
Major-severe storm 01/01/01

SpaceRef staff editor.