Joint USAF/NOAA Report of Solar and Geophysical Activity 26 Aug 2009

:Product: Report of Solar-Geophysical Activity
:Issued: 2009 Aug 26 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 238 Issued at 2200Z on 26 Aug 2009
IA. Analysis of Solar Active Regions and Activity from 25/2100Z
to 26/2100Z: Solar activity was very low. No flares were detected.
The visible disk was spotless.
IB. Solar Activity Forecast: Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 25/2100Z to 26/2100Z:
Geomagnetic field activity was at mostly quiet levels. One isolated
unsettled period was observed between 26/0000 – 0300Z.
IIB. Geophysical Activity Forecast: Geomagnetic field activity is
expected to be quiet to unsettled on days one and two (27 – 28
August), due to effects from a coronal hole. Quiet conditions are
expected on day three (29 August).
III. Event Probabilities 27 Aug-29 Aug
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF green
IV. Penticton 10.7 cm Flux
Observed 26 Aug 067
Predicted 27 Aug-29 Aug 068/068/068
90 Day Mean 26 Aug 068
V. Geomagnetic A Indices
Observed Afr/Ap 25 Aug 002/003
Estimated Afr/Ap 26 Aug 005/005
Predicted Afr/Ap 27 Aug-29 Aug 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 27 Aug-29 Aug
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