Status Report

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

By SpaceRef Editor
July 18, 2009
Filed under , , ,

:Product: Report of Solar-Geophysical Activity
:Issued: 2009 Jul 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 199 Issued at 2200Z on 18 Jul 2009
IA. Analysis of Solar Active Regions and Activity from 17/2100Z
to 18/2100Z: Solar activity was very low. No flares occurred as the
disk remains spotless.
IB. Solar Activity Forecast: Solar activity will continue very low.
IIA. Geophysical Activity Summary 17/2100Z to 18/2100Z:
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast: The geomagnetic field will be
quiet early in the interval, then become increasingly disturbed when
a recurrent high-speed stream returns. Unsettled to active
conditions are anticipated by July 21.
III. Event Probabilities 19 Jul-21 Jul
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
IV. Penticton 10.7 cm Flux
Observed 18 Jul 067
Predicted 19 Jul-21 Jul 067/067/067
90 Day Mean 18 Jul 069
V. Geomagnetic A Indices
Observed Afr/Ap 17 Jul 000/002
Estimated Afr/Ap 18 Jul 000/005
Predicted Afr/Ap 19 Jul-21 Jul 005/005-005/008-015/018
VI. Geomagnetic Activity Probabilities 19 Jul-21 Jul
A. Middle Latitudes
Active 05/05/25
Minor storm 01/01/01
Major-severe storm 01/01/01
B. High Latitudes
Active 05/05/35
Minor storm 01/01/05
Major-severe storm 01/01/01

SpaceRef staff editor.