Report of Solar-Geophysical Activity

Issued: 2005 Dec 06 2200 UTC

Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Environment Center and the U.S. Air Force.

Joint USAF/NOAA Report of Solar and Geophysical Activity SDF Number 340 Issued at 2200Z on 06 Dec 2005 IA. Analysis of Solar Active Regions and Activity from 05/2100Z to 06/2100Z: Solar activity was very low.

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

IIA. Geophysical Activity Summary 05/2100Z to 06/2100Z:

The geomagnetic field was quiet. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels today.

IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled. Isolated active periods are possible on 07 December.

III. Event Probabilities 07 Dec-09 Dec

Class M 10/05/05

Class X 01/01/01

Proton 01/01/01

PCAF green

IV. Penticton 10.7 cm Flux

Observed 06 Dec 089

Predicted 07 Dec-09 Dec 090/090/085

90 Day Mean 06 Dec 086

V. Geomagnetic A Indices

Observed Afr/Ap 05 Dec 002/002

Estimated Afr/Ap 06 Dec 003/005

Predicted Afr/Ap 07 Dec-09 Dec 008/010-005/005-005/008 VI. Geomagnetic Activity Probabilities 07 Dec-09 Dec A. Middle Latitudes

Active 20/15/15

Minor storm 10/05/05

Major-severe storm 01/01/01

B. High Latitudes

Active 25/15/20

Minor storm 10/05/10

Major-severe storm 01/01/01