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

Product: Report of Solar-Geophysical Activity
Issued: 2008 Aug 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 238 Issued at 2200Z on 25 Aug 2008

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

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

IIA. Geophysical Activity Summary 24/2100Z to 25/2100Z: The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit was at high levels.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet during the forecast period (26 – 28 August).

III. Event Probabilities 26 Aug-28 Aug

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

IV. Penticton 10.7 cm Flux

• Observed 25 Aug 067
• Predicted 26 Aug-28 Aug 067/067/067
• 90 Day Mean 25 Aug 066

V. Geomagnetic A Indices

• Observed Afr/Ap 24 Aug 002/004
• Estimated Afr/Ap 25 Aug 002/005
• Predicted Afr/Ap 26 Aug-28 Aug 005/005-005/005-005/005

VI. Geomagnetic Activity Probabilities 26 Aug-28 Aug

A. Middle Latitudes

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

B. High Latitudes

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