Joint USAF/NOAA Report of Solar and Geophysical Activity 26 Dec 2008

Product: Report of Solar-Geophysical Activity
Issued: 2008 Dec 26 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 361 Issued at 2200Z on 26 Dec 2008

IA. Analysis of Solar Active Regions and Activity from 25/2100Z to 26/2100Z: Solar activity was very low. No flares were observed. The visible disk was spotless.

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

IIA. Geophysical Activity Summary 25/2100Z to 26/2100Z: Geomagnetic field activity was at quiet levels at all latitudes.

IIB. Geophysical Activity Forecast: Geomagnetic field activity is expected to be at quiet levels throughout the forecast period (27 – 29 December).

III. Event Probabilities 27 Dec-29 Dec

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

IV. Penticton 10.7 cm Flux

• Observed 26 Dec 069
• Predicted 27 Dec-29 Dec 071/071/071
• 90 Day Mean 26 Dec 069

V. Geomagnetic A Indices

• Observed Afr/Ap 25 Dec 002/003
• Estimated Afr/Ap 26 Dec 002/005
• Predicted Afr/Ap 27 Dec-29 Dec 005/005-005/005-005/005

VI. Geomagnetic Activity Probabilities 27 Dec-29 Dec

A. Middle Latitudes

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

B. High Latitudes

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