Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 07 Sep 2004

By SpaceRef Editor

September 7, 2004

Filed under Space Weather Prediction Center (NOAA), Space Weather Solar-Geophysical Activity, US

Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Environment Center and the U.S. Air Force.

Updated 2004 Sep 07 2210 UTC

Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 251 Issued at 2200Z on 07 Sep 2004

IA. Analysis of Solar Active Regions and Activity from 06/2100Z
to 07/2100Z: Solar activity was low. A C1.1 flare occurred at 0738
UTC from Region 669 (S06E06). A long duration C2.8 flare occurred
with a maximum at 1529 UTC. The source was observed in SXI on the
East limb at N04, apparently associated with a region behind the
visible disk. A backsided partial halo CME was associated with this
flare. Region 671 (S11W42) has grown in area but has not produced
any flares in the past 24 hours.

IB. Solar Activity Forecast: Solar activity is expected to be low
with a slight chance for isolated M-Class flares. Background levels
are expected to gradually increase due to a region rotating onto the
visible disk.

IIA. Geophysical Activity Summary 06/2100Z to 07/2100Z:
The geomagnetic field ranged from quiet to active levels. Solar wind
data has indicated the presence of a coronal hole stream with
velocities ranging from 410-470 km/s.

IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be mostly unsettled for the next three days (08-10
September). There is a slight chance of some persistent active
levels during the next 24 hours.

III. Event Probabilities 08 Sep-10 Sep