Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 01 Aug 2005

By SpaceRef Editor

August 1, 2005

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 2005 Aug 01 2204 UTC

Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 213 Issued at 2200Z on 01 Aug 2005

IA. Analysis of Solar Active Regions and Activity from 31/2100Z
to 01/2100Z: Solar activity was at moderate levels. Region 792
(N12E25) produced the largest flare during the period, a long
duration M1/1f flare that occurred at 01/1351Z. This event
generated an associated Tenflare (290 sfu), a Type IV radio sweep,
and a CME that may have a weak geoeffective component. Region 792
underwent a decrease in sunspot number however, sunspot area has
remained the same. This region continues to exhibit
beta-gamma-delta magnetic features. Region 794 (S11E60) produced
the second largest flare during the period, a C5 x-ray event that
occurred at 01/1221Z. This region has shown growth in sunspot area
over the interval. No new regions were numbered today.

IB. Solar Activity Forecast: Solar activity is expected to be at
moderate levels. Region 792 is capable of producing M-class flares.

IIA. Geophysical Activity Summary 31/2100Z to 01/2100Z:
The geomagnetic field was at quiet to active levels. The elevated
activity may be attributed to a weak transient that was observed at
the ACE spacecraft at approximately 01/0500Z. The greater than 10
MeV proton event that began at 27/2300Z ended at 01/1040Z, a maximum
of 41 pfu occurred at 29/1715Z.

IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be at predominantly quiet to unsettled levels. Isolated
active conditions are possible on 04 August due to a glancing blow
from the CME that was associated with the M1/1f flare that occurred
today.

III. Event Probabilities 02 Aug-04 Aug