Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 11 Sep 2008

By SpaceRef Editor
September 12, 2008
Filed under , , ,

Product: Report of Solar-Geophysical Activity
Issued: 2008 Sep 11 2200 UTC
Prepared jointly by the U.S. Dept. of Commerce, NOAA,
Space Weather Prediction Center and the U.S. Air Force.

Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 255 Issued at 2200Z on 11 Sep 2008

IA. Analysis of Solar Active Regions and Activity from 10/2100Z to 11/2100Z: Solar activity was very low. New Region 1001 (N06E14) was numbered today.

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

IIA. Geophysical Activity Summary 10/2100Z to 11/2100Z: The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit was at high levels today.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet levels for 12 September. Quiet to unsettled conditions are forecast for 13 September, with unsettled to active conditions expected for 14 September. The increase in activity is forecast due to a recurrent coronal hole high speed stream.

III. Event Probabilities 12 Sep-14 Sep

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

IV. Penticton 10.7 cm Flux

  • Observed 11 Sep 067
  • Predicted 12 Sep-14 Sep 066/066/066
  • 90 Day Mean 11 Sep 066

V. Geomagnetic A Indices

  • Observed Afr/Ap 10 Sep 002/004
  • Estimated Afr/Ap 11 Sep 002/005
  • Predicted Afr/Ap 12 Sep-14 Sep 005/005-007/008-015/020

VI. Geomagnetic Activity Probabilities 12 Sep-14 Sep

A. Middle Latitudes

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

B. High Latitudes

  • Active 10/25/40
  • Minor storm 01/05/20
  • Major-severe storm 01/01/10

SpaceRef staff editor.