2008•Geomagnetism and AeronomyRequires access

Regional features of the geomagnetic field secular variations

T. N. Bondar, Vadim P. Golovkov, Svetlana V. Yakovleva

Abstract

The secular variations in the geomagnetic field have been studied based on the satellite vector magnetic survey. A high data accuracy made it possible to estimate the spatial and temporal characteristics of different variation types on the interval 1980–2007. The growth and decomposition of midlatitude foci have been qualitatively estimated, and the structure and velocity of a drifting equatorial anomaly have been determined.

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Key concepts: Earth's magnetic field, Secular variation, Geomagnetic secular variation, Anomaly (physics), Middle latitudes, Geology, Geophysics, Variation (astronomy)