Status Report

Joint USAF/NOAA Report of Solar and Geophysical Activity 23 Sep 2007

By SpaceRef Editor
September 24, 2007
Filed under , , ,
Joint USAF/NOAA Report of Solar and Geophysical Activity 23 Sep 2007

Product: Report of Solar-Geophysical Activity
Issued: 2007 Sep 23 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 266 Issued at 2200Z on 23 Sep 2007

IA. Analysis of Solar Active Regions and Activity from 22/2100Z to 23/2100Z: Solar activity was very low. The visible solar disk remains spotless.

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

IIA. Geophysical Activity Summary 22/2100Z to 23/2100Z: The geomagnetic field ranged from quiet to active. Solar wind speed is elevated at approximately 650 km/s due to a geoeffective coronal hole high speed stream.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled with possible active periods on 24 September due to the coronal hole high speed stream. Expect quiet to unsettled conditions on 25 – 26 September.

III. Event Probabilities 24 Sep-26 Sep

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

IV. Penticton 10.7 cm Flux

  • Observed 23 Sep 066
  • Predicted 24 Sep-26 Sep 067/067/067
  • 90 Day Mean 23 Sep 070

V. Geomagnetic A Indices

  • Observed Afr/Ap 22 Sep 010/011
  • Estimated Afr/Ap 23 Sep 012/015
  • Predicted Afr/Ap 24 Sep-26 Sep 010/010-005/008-005/005

VI. Geomagnetic Activity Probabilities 24 Sep-26 Sep

A. Middle Latitudes

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

B. High Latitudes

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

SpaceRef staff editor.