Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 25 Jul 2007

By SpaceRef Editor
July 25, 2007
Filed under , , ,
Joint USAF/NOAA Report of Solar and Geophysical Activity 25 Jul 2007
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Product: Report of Solar-Geophysical Activity
Issued: 2007 Jul 25 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 206 Issued at 2200Z on 25 Jul 2007

IA. Analysis of Solar Active Regions and Activity from 24/2100Z to 25/2100Z: Solar activity was very low. The visible disk remains spotless.

IB. Solar Activity Forecast: Solar activity is expected to remain very low.

IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z: The geomagnetic field was quiet.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be unsettled to active for 26 July as a coronal hole high speed stream becomes geoeffective. On 27 July the geomagnetic field is expected to be quiet to unsettled before abating to quiet on 28 July.

III. Event Probabilities 26 Jul-28 Jul

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

IV. Penticton 10.7 cm Flux

  • Observed 25 Jul 069
  • Predicted 26 Jul-28 Jul 068/068/070
  • 90 Day Mean 25 Jul 074

V. Geomagnetic A Indices

  • Observed Afr/Ap 24 Jul 002/002
  • Estimated Afr/Ap 25 Jul 005/005
  • Predicted Afr/Ap 26 Jul-28 Jul 010/015-005/005-005/005

VI. Geomagnetic Activity Probabilities 26 Jul-28 Jul

A. Middle Latitudes

  • Active 30/10/10
  • Minor storm 15/05/05
  • Major-severe storm 01/01/01

B. High Latitudes

  • Active 35/20/15
  • Minor storm 15/10/05
  • Major-severe storm 10/05/01

SpaceRef staff editor.