PEMODELAN MEKANISME SUMBER GEMPA BUMI RANSIKI 2012 BERKEKUATAN MW 6,7

Authors

DOI:

https://doi.org/10.23887/jstundiksha.v6i1.9333

Keywords:

mekanisme sumber gempabumi, inversi, isola, HC-plot

Abstract

Salah satu gempabumi merusak yang terjadi di Indonesia pada tahun 2012 yaitu gempabumi Ransiki, Papua Barat 21 April 2012, Mw 6,7. Yang menarik dari gempabumi ini yaitu lokasi gempabumi yang berdekatan dengan dua sesar, yaitu sesar Ransiki dan sesar Yapen sehingga tujuan penelitian ini yaitu membuat pemodelan dan menganalisis mekanisme sumber gempabumi untuk mengetahui sesar penyebab gempabumi Ransiki. Mekanisme sumber gempabumi dimodelkan dari proses inversi tensor momen menggunakan program Isola. Untuk menentukan bidang sesar sebenarnya digunakan program HC-plot. Hasil inversi tensor momen menunjukan bahwa gempabumi Ransiki merupakan gempabumi mekanisme sesar geser dengan bidang nodal 1; strike 3550, dip 680, rake -1650 dan bidang nodal 2; strike 2590, dip 760, rake -230. Pengolahan dengan program HC-plot menghasilkan bidang sesar sebenarnya yaitu bidang nodal 2 dengan strike 2590, dip 760, rake -230. Hasil ini menunjukan bahwa gempabumi Ransiki 21 April 2012 Mw 6,7, disebabkan oleh sesar Yapen dengan mekanisme sesar geser mengiri berarah barat-timur.

Author Biographies

Dimas Salomo Januarianto Sianipar, Sekolah Tinggi Meteorologi Klimatologi dan Geofisika (STMKG), Badan Meteorologi Klimatologi dan Geofisika (BMKG)

Seismologist at BMKG, Junior Lecturer at STMKG-BMKG

Google Scholar: Dimas Salomo J. Sianipar

Scopus : https://www.scopus.com/authid/detail.uri?authorId=57191245129

Yopi Ruben Serhalawan, Stasiun Geofisika Sorong, Badan Meteorologi Klimatologi dan Geofisika (BMKG), Sorong, Papua Barat, Indonesia

Seismologist at Stasiun Geofisika Sorong BMKG

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Published

2017-03-30

Issue

Vol. 6 No. 1 (2017)

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Articles

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