Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 28 Nov 2004

By SpaceRef Editor

November 28, 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 Nov 28 2210 UTC

Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 333 Issued at 2200Z on 28 Nov 2004

IA. Analysis of Solar Active Regions and Activity from 27/2100Z
to 28/2100Z: Solar activity was very low. All four spotted regions
on the disk were quiet and stable. Region 708 (N10E56) is showing
slow growth.

IB. Solar Activity Forecast: Solar activity is expected to be very
low to low for the next three days (29 November – 01 December).

IIA. Geophysical Activity Summary 27/2100Z to 28/2100Z:
The geomagnetic field was mostly quiet to unsettled. There was a
period of minor storm level activity from 0600-0900 UTC due to a
substorm that appeared to be triggered by a northward turning of the
IMF after a sustained interval of weakly southward orientation.
Solar wind data show the onset of a solar sector boundary from
positive to negative orientation at about 1500 UTC. The greater than
2 MeV electron fluxes attained high levels during the past 24 hours.

IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be mostly unsettled with a chance for some isolated
active periods during the next three days (29 November – 01
December). The influence of a favorably positioned coronal hole are
expected to begin late on 01 December.

III. Event Probabilities 29 Nov-01 Dec