Magnetic fields over active tectonic zones in ocean

Journal of Geodynamics
By: , and 

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Abstract

The aim of our work is to estimate the electromagnetic effects that can be detected in the submarine zones with hydrothermal activity. It is known that meso-scale flows appear in the regions over underwater volcanoes or hot rocks. Their origin is connected with heat flux and hot jets released from underwater volcanoes or faults in a sea bottom. Values of mean velocities and turbulent velocities in plumes were estimated. Quasiconstant magnetic fields induced by a hot jet and a vortex over a plume top are about 1-40 nT. Variable magnetic fields are about 0.1-1 nT. These magnetic disturbances in the sea medium create an additional natural electromagnetic background that must be considered when making detailed magnetic surveys. ?? 2002 Elsevier Science Ltd. All rights reserved.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Magnetic fields over active tectonic zones in ocean
Series title Journal of Geodynamics
DOI 10.1016/S0264-3707(02)00012-1
Volume 33
Issue 4-5
Year Published 2002
Language English
Publisher Elsevier
Contributing office(s) Geologic Hazards Science Center
Description 8 p.
First page 489
Last page 496