Volume 2, Issue 3, August 2017, Page: 132-150
Geoblocks Delineation and Recognition of Earthquake Prone Areas in the Tuan Giao Area (Northwest Vietnam)
Nguyen Huu Tuyen, Department of Tectonophysics, Institute of Geophysics, VAST, A8, 18 Hoang Quoc Viet, Nghia Do, Cau Giay Hanoi, Vietnam
Pham Nam Hung, Departments of Geodynamic, Institute of Geophysics, VAST, A8, 18 Hoang Quoc Viet, Nghia Do, Cau Giay Hanoi, Vietnam
Cao Dinh Trong, Departments of Geodynamic, Institute of Geophysics, VAST, A8, 18 Hoang Quoc Viet, Nghia Do, Cau Giay Hanoi, Vietnam
Nguyen TrungThanh, Institute of Marine Geology and Geophysics, VAST, A27, 18 Hoang Quoc Viet, Nghia Do, Cau Giay Hanoi, Vietnam
Phung Van Phach, Institute of Marine Geology and Geophysics, VAST, A27, 18 Hoang Quoc Viet, Nghia Do, Cau Giay Hanoi, Vietnam
Renat Shakirov, Gasgeochemistry Laboratory, V. I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russian Federation
Received: May 24, 2017;       Accepted: Jun. 3, 2017;       Published: Jul. 24, 2017
DOI: 10.11648/j.ajere.20170203.16      View  2408      Downloads  140
The goal of the paper is to delineate the hierarchical block- structure in the Tuan Giao area (Northwest Vietnam) and, on that base, to identify earthquake prone areas for M5+. Four large geoblocks of the second rank have been delineated on the basis of the joint analysis of geological, geophysical, geomorphic, and remote sensing data. The second rank geoblocks have been divided into smaller sub-blocks of the third rank. The recent geodynamics of the geoblocks have been characterized using geomorphic, seismological, gravity, and GPS data. The system of the delineated geoblocks is viewed as the Geodynamic Blocks model (GB). Earthquake prone areas for M5+ have been identified with the pattern recognition algorithm CORA-3. The objects of the recognition were defined as the circular areas where boundaries of the geoblocks intersect each other. The results of the recognition confirms high seismic potential of the study region and provides information on potential earthquake sources for seismic hazard assessment: a number of boundary intersections have been identified as prone to M5+ in the areas where events of such size are not recorded up to date.
Geoblocks, Pattern Recognition, Earthquakes, Boundary Intersections, Tuan Giao
To cite this article
Nguyen Huu Tuyen, Pham Nam Hung, Cao Dinh Trong, Nguyen TrungThanh, Phung Van Phach, Renat Shakirov, Geoblocks Delineation and Recognition of Earthquake Prone Areas in the Tuan Giao Area (Northwest Vietnam), American Journal of Environmental and Resource Economics. Vol. 2, No. 3, 2017, pp. 132-150. doi: 10.11648/j.ajere.20170203.16
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This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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