Joint USAF/NOAA Report of Solar and Geophysical Activity 28 Jan 2008

Product: Report of Solar-Geophysical Activity
Issued: 2008 Jan 28 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 028 Issued at 2200Z on 28 Jan 2008

IA. Analysis of Solar Active Regions and Activity from 27/2100Z to 28/2100Z: 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 27/2100Z to 28/2100Z: The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels again today.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet.

III. Event Probabilities 29 Jan-31 Jan

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

IV. Penticton 10.7 cm Flux

• Observed 28 Jan 071
• Predicted 29 Jan-31 Jan 075/080/080
• 90 Day Mean 28 Jan 074

V. Geomagnetic A Indices

• Observed Afr/Ap 27 Jan 002/002
• Estimated Afr/Ap 28 Jan 002/005
• Predicted Afr/Ap 29 Jan-31 Jan 005/005-005/005-005/005

VI. Geomagnetic Activity Probabilities 29 Jan-31 Jan

A. Middle Latitudes

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

B. High Latitudes

• Active 10/10/10
• Minor storm 05/05/05
• Major-severe storm 02/02/02