Joint USAF/NOAA Report of Solar and Geophysical Activity 25 Sep 2008

Product: Report of Solar-Geophysical Activity
Issued: 2008 Sep 25 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 269 Issued at 2200Z on 25 Sep 2008

IA. Analysis of Solar Active Regions and Activity from 24/2100Z to 25/2100Z: Solar activity was very low. No flares were observed during the past 24 hours. The visible disk is spotless.

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

IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z: The geomagnetic field was quiet during the past 24 hours. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet for the forecast period (26-28 September).

III. Event Probabilities 26 Sep-28 Sep

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

IV. Penticton 10.7 cm Flux

• Observed 25 Sep 068
• Predicted 26 Sep-28 Sep 069/067/066
• 90 Day Mean 25 Sep 066

V. Geomagnetic A Indices

• Observed Afr/Ap 24 Sep 001/004
• Estimated Afr/Ap 25 Sep 005/005
• Predicted Afr/Ap 26 Sep-28 Sep 005/005-005/005-005/005

VI. Geomagnetic Activity Probabilities 26 Sep-28 Sep

A. Middle Latitudes

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

B. High Latitudes

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