Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 28 Jul 2009

By SpaceRef Editor
July 27, 2009
Filed under , , ,

:Product: Report of Solar-Geophysical Activity
:Issued: 2009 Jul 28 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 209 Issued at 2200Z on 28 Jul 2009
IA. Analysis of Solar Active Regions and Activity from 27/2100Z
to 28/2100Z: Solar activity was very low. No flares occurred during
the past 24 hours. The solar disk continues to be void of sunspots.
IB. Solar Activity Forecast: Solar activity is expected to be very
IIA. Geophysical Activity Summary 27/2100Z to 28/2100Z:
The geomagnetic field was quiet during the past 24 hours.
IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be quiet for the next two days (29-30 July). A slight
increase is possible on the third day (31 July) due to a favorably
positioned coronal hole; quiet to unsettled levels should
predominate although there is a slight chance for an active period.
III. Event Probabilities 29 Jul-31 Jul
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 28 Jul 069
Predicted 29 Jul-31 Jul 069/070/070
90 Day Mean 28 Jul 069
V. Geomagnetic A Indices
Observed Afr/Ap 27 Jul 002/004
Estimated Afr/Ap 28 Jul 005/005
Predicted Afr/Ap 29 Jul-31 Jul 005/005-005/005-007/007
VI. Geomagnetic Activity Probabilities 29 Jul-31 Jul
A. Middle Latitudes
Active 05/05/20
Minor storm 01/01/05
Major-severe storm 01/01/01
B. High Latitudes
Active 05/05/20
Minor storm 01/01/10
Major-severe storm 01/01/05

SpaceRef staff editor.