Technical Papers - Airborne Magnetics

Geomagnetic Activity Affecting Aeromagnetic Surveys over Canada in 2000

Marc A. Vallée*, Mouhamed Moussaoui, Fugro Airborne Surveys
Larry Newitt, Régis Dumont and Pierre Keating, Geological Survey of Canada,
Ian Mann, University of Alberta.

Abstract

Pc3 index amplitude characterizes the geomagnetic activity affecting aeromagnetic surveys. A study of Pc3 index amplitude over Canada in 2000 shows that the sub-auroral zone, the auroral zone, and the polar cap have distinct patterns of activity. Average activity is higher during the months of February, July, and November in the auroral and sub-auroral zones. The station in the polar cap exhibits maximum activity near midday during the summer months. At all locations, activity is stronger with faster solar wind. Detailed analysis of a magnetic storm shows that Pc3 index amplitude during the main phase of the solar storm is important at all locations except at the polar cap.

To be presented at the 2005 SEG meeting in Houston, Texas.

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