A gravity database of southwest Japan: Application to Bouguer gravity imaging in Kyushu district, Southwest Japan

R. Shichi, A. Yamamoto, T. Kudo, Y. Murata, K. Nawa, M. Komazawa, M. Nakada, H. Miyamachi, H. Komuro, Y. Fukuda, T. Higashi, Y. Yusa, I. Nakagawa, H. Watanabe, J. Oikawa, S. Kobayashi, I. Ohno

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to investigate subsurface density structures with the highest precision, two major gravity databases and some unpublished data files, which cover Southwest Japan, are recompiled. This paper presents some examples of the detailed gravity anomaly maps in Kyushu District, southwest Japan. These maps indicate various fine subsurface structures, which may arose with tectonic movements and/or volcanic activities of this region. With an aid of geological and topographical information, we discussed relationships between characteristic patterns of the detailed gravity anomalies and subsurface structures in this region. The most conspicuous feature is an existence of a steep horizontal gradient zone of gravity anomalies running through the Aso Caldera in the ENE-WSW direction. Although the location of the westward extension of the Median Tectonic Line (MTL) in this region is still debatable, this zone seems to be the westernmost part of MTL.

Original languageEnglish
Title of host publicationA Window on the Future of Geodesy - Proceedings of the International Association of Geodesy
EditorsFernando Sansò
PublisherSpringer Verlag
Pages236-241
Number of pages6
ISBN (Print)9783540240556
DOIs
Publication statusPublished - 2005
EventProceedings of the International Association of Geodesy, IAG 2003 - Sapporo, Japan
Duration: Jun 30 2003Jul 11 2003

Publication series

NameInternational Association of Geodesy Symposia
Volume128
ISSN (Print)0939-9585
ISSN (Electronic)2197-9359

Other

OtherProceedings of the International Association of Geodesy, IAG 2003
Country/TerritoryJapan
CitySapporo
Period6/30/037/11/03

All Science Journal Classification (ASJC) codes

  • Computers in Earth Sciences
  • Geophysics

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