Joint USAF/NOAA Report of Solar and Geophysical Activity 27 Aug 2008

Product: Report of Solar-Geophysical Activity
Issued: 2008 Aug 27 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 240 Issued at 2200Z on 27 Aug 2008

IA. Analysis of Solar Active Regions and Activity from 26/2100Z to 27/2100Z: Solar activity was very low. The visible disk remains spotless.

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

IIA. Geophysical Activity Summary 26/2100Z to 27/2100Z: The geomagnetic field was quiet.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be mostly quiet on day one (28 August) and quiet on days two and three (29-30 August).

III. Event Probabilities 28 Aug-30 Aug

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

IV. Penticton 10.7 cm Flux

• Observed 27 Aug 067
• Predicted 28 Aug-30 Aug 067/067/067
• 90 Day Mean 27 Aug 066

V. Geomagnetic A Indices

• Observed Afr/Ap 26 Aug 001/003
• Estimated Afr/Ap 27 Aug 005/004
• Predicted Afr/Ap 28 Aug-30 Aug 007/007-005/005-005/005

VI. Geomagnetic Activity Probabilities 28 Aug-30 Aug

A. Middle Latitudes

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

B. High Latitudes

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