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Articles

Volume 1, Number 2 (2000)

Approach for the Realisation of Sea Bottom Crustal Deformation Observations Targets and Tactics in Waters around Japan

Submitted
August 9, 2013
Published
2000-06-06

Abstract

The Japan Hydrographic Department (JHD), has been pursuing two approaches using acoustic geodetic techniques to observe the crustal deformations on the deep sea floor to understand the mechanisms of major interplate earthquakes at subduction plate boundaries. One is the repeated acoustic ranging between two stations on the sea floor. The other is the linkage of GPS precise positioning of a sea surface platform and acoustic ranging between the sea surface and sea bottom transducers. The applicability of both methods to detect the plate motions of oceanic crust has already been demonstrated, through sea trials . In the JHD, there is a plan to realise operational surveys for the detect ion of sea bottom crustal deform ations .