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

Product: Report of Solar-Geophysical Activity
Issued: 2008 Jan 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 026 Issued at 2200Z on 26 Jan 2008

IA. Analysis of Solar Active Regions and Activity from 25/2100Z to 26/2100Z: Solar activity was very low. The visible solar disk remains spotless.

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

IIA. Geophysical Activity Summary 25/2100Z to 26/2100Z: The geomagnetic field was primarily quiet with an isolated unsettled period at 1200Z. 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 predominantly quiet.

III. Event Probabilities 27 Jan-29 Jan

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

IV. Penticton 10.7 cm Flux

• Observed 26 Jan 073
• Predicted 27 Jan-29 Jan 075/075/075
• 90 Day Mean 26 Jan 074

V. Geomagnetic A Indices

• Observed Afr/Ap 25 Jan 008/011
• Estimated Afr/Ap 26 Jan 007/008
• Predicted Afr/Ap 27 Jan-29 Jan 005/005-005/005-005/008

VI. Geomagnetic Activity Probabilities 27 Jan-29 Jan

A. Middle Latitudes

• Active 10/10/10
• 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 01/01/01