Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 18 Sep 2009

By SpaceRef Editor
September 21, 2009
Filed under , , ,

:Product: Report of Solar-Geophysical Activity
:Issued: 2009 Sep 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 261 Issued at 2200Z on 18 Sep 2009
IA. Analysis of Solar Active Regions and Activity from 17/2100Z
to 18/2100Z: Solar activity was very low. No flares were observed.
The visible disk remains spotless.
IB. Solar Activity Forecast: Solar activity is expected to remain
very low.
IIA. Geophysical Activity Summary 17/2100Z to 18/2100Z:
The geomagnetic field was predominantly quiet with an isolated period
of unsettled conditions from 0000Z-03000Z.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to remain at quiet levels for the next three days (19-21
September).
III. Event Probabilities 19 Sep-21 Sep
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 18 Sep 069
Predicted 19 Sep-21 Sep 070/070/070
90 Day Mean 18 Sep 068
V. Geomagnetic A Indices
Observed Afr/Ap 17 Sep 006/008
Estimated Afr/Ap 18 Sep 005/005
Predicted Afr/Ap 19 Sep-21 Sep 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 19 Sep-21 Sep
A. Middle Latitudes
Active 05/05/05
Minor storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 05/05/05
Minor storm 01/01/01
Major-severe storm 01/01/01

SpaceRef staff editor.