Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 27 Jul 2006

By SpaceRef Editor
July 27, 2006
Filed under , , ,
Joint USAF/NOAA Report of Solar and Geophysical Activity  27 Jul 2006
http://images.spaceref.com/news/sun.5.jpg

Product: Report of Solar-Geophysical Activity
Issued: 2006 Jul 27 2200 UTC
Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Environment Center and the U.S. Air Force.

Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 208 Issued at 2200Z on 27 Jul 2006

IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: Solar activity continues at very low levels. Region 901 (N05E00), the only sunspot group on the visible disk, produced occasional low B-class flares. Considerable decay was observed in the trailing sunspots in this region; however, new negative flux emerged northwest of the leader spot. This location was the source of most of the B-class flares.

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

IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: The geomagnetic field was quiet. Solar wind speed increased gradually from 330 km/s to near 450 km/s by the end of the period. This increase is associated with a weak high speed coronal hole stream.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet with isolated unsettled periods.

III. Event Probabilities 28 Jul-30 Jul

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

IV. Penticton 10.7 cm Flux

  • Observed 27 Jul 074
  • Predicted 28 Jul-30 Jul 075/075/075
  • 90 Day Mean 27 Jul 078

V. Geomagnetic A Indices

  • Observed Afr/Ap 26 Jul 005/006
  • Estimated Afr/Ap 27 Jul 005/005
  • Predicted Afr/Ap 28 Jul-30 Jul 005/005-005/005-005/005

VI. Geomagnetic Activity Probabilities 28 Jul-30 Jul

A. Middle Latitudes

  • Active 15/15/15
  • Minor storm 05/05/05
  • Major-severe storm 01/01/01

B. High Latitudes

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

SpaceRef staff editor.