Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 31 Mar 2005

By SpaceRef Editor
April 1, 2005
Filed under , ,

Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Environment Center and the U.S. Air Force.
Updated 2005 Mar 31 2200 UTC

Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 090 Issued at 2200Z on 31 Mar 2005

IA. Analysis of Solar Active Regions and Activity from 30/2100Z
to 31/2100Z: Solar activity remains at very low levels. Regions 747
(S07E23) and 748 (N09E59) are both HSX alpha spot groups that were
numbered today. Region 745 (N11W80) continues a slow decay and is
now spotless.

IB. Solar Activity Forecast: Solar activity is expected to continue
at very low levels.

IIA. Geophysical Activity Summary 30/2100Z to 31/2100Z:
The geomagnetic field was at quiet to unsettled levels. The greater
than 2 MeV electron flux at geosynchronous orbit reached high levels

IIB. Geophysical Activity Forecast: The geomagnetic field is
expected to be at quiet to unsettled levels through 1 April.
Isolated minor storming conditions are expected late on 2 April due
to the onset of a recurrent coronal hole high speed stream and
should continue through 3 April.

III. Event Probabilities 01 Apr-03 Apr

  • Class M 01/01/01
  • Class X 01/01/01
  • Proton 01/01/01
  • PCAF green

IV. Penticton 10.7 cm Flux

  • Observed 31 Mar 077
  • Predicted 01 Apr-03 Apr 080/085/085
  • 90 Day Mean 31 Mar 097

V. Geomagnetic A Indices

  • Observed Afr/Ap 30 Mar 006/009
  • Estimated Afr/Ap 31 Mar 005/008
  • Predicted Afr/Ap 01 Apr-03 Apr 008/010-015/015-015/025

VI. Geomagnetic Activity Probabilities 01 Apr-03 Apr

A. Middle Latitudes

  • Active 20/30/30
  • Minor storm 05/10/10
  • Major-severe storm 01/05/05

B. High Latitudes

  • Active 20/30/40
  • Minor storm 05/10/20
  • Major-severe storm 01/05/10

SpaceRef staff editor.