Report of Solar-Geophysical Activity

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