RELOKASI HIPOSENTER GEMPABUMI MENGGUNAKAN METODE MODIFIED JOINT HYPOCENTER DETERMINATION (MJHD) UNTUK ANALISIS ZONA SUBDUKSI SUMATERA BAGIAN SELATAN
DOI:
https://doi.org/10.23960/jge.v4i1.9Keywords:
hypocenter relocation, MJHD, subduction zoneAbstract
The part of south Sumatera is very vulnerable region in case of earthquake disaster caused by convergent boundary of two tectonic plates Indo-Australian Plates and Eurasian Plates. Precise hypocenter analysis is needed to understand about  the accurate tectonic setting such as subduction zone in the area. Hypocenter relocation is used to recalculate earthquake hypocenter to become more accurate. To produce a more accurate hyposenter this hyposenter relocation is done by using the method of Modified Joint Hypocenter Determination (MJHD). Relocation using the Modified Joint Hypocenter Determination (MJHD) method uses IASP91 wave velocity which assumes that the inner structures are heterogeneous. In this study, used data P-wave and S-wave  arrival time in the period January 2010 s.d December 2016 with coordinates -3.5º s.d -9º LS - 99º s.d 106.5º BT. The results of the relocation using MJHD showed a change of earthquake hypocenter shown by RMS (Root Mean Square) value ranging from 0.2 s.d 0.5. There are three subduction of the part in south sumatra. The subduction zone formed in Bengkulu is about 26.78º, the subduction zone of Lampung is around 30.225º and the subduction of the Sunda Strait is about 52.53º. Subduction zone of Bengkulu at depth of 250 km, Lampung and Sunda Strait at depth 400 km.
References
Kaluku, A., 2015, Relokasi Gempabumi di Wilayah Selat Sunda Menggunakan Metode Double Different (hypo DD), Skripsi, Geofisika, STMKG, Tangerang Selatan.
Listyaningrum, Z., 2015, Studi Hubungan Antara Sudut Penunjaman Lempeng Indo-Australia - Eurasia Terhadap Tatanan Tektonik Overriding Plate, Skripsi, Geofisika, STMKG, Tangerang Selatan.
Mangga, S.A., Amirudin, T., Suwarti, S., Gafoer dan Sidarto, 1993, Peta Geologi Tanjungkarang, Sumatera, Pusat Penelitian dan Pengembangan Geologi, Bandung.
Maung, P.M., 2009, Relocation of Earthquakes in Myanmar by MJHDMethod: Aftershocks of Large Earthquakes and Seismicity Along the Sagaing Fault, IISEE, Tsukuba, Ibaraki, Japan.
Hurukawa, N., dan Imoto, M., 1992, Subducting Oceanic Crust of the Philippine Sea and Pacific Plates and Weak Zone Normal Compression in Kanto District, Japan, Geophys. J. Int., 109: 639652.
Pesicek, J.D., Thurber, C.H., Zhang, H., Engdahl, .R., dan Widiyantoro, S. Teleseismic Doubl-Different Rlocation Arthuakes Along the Sumatera-Andan Subduction Zone Using 3D Model. Journal Geophysical Research. Vol 115.
Pujol, J., 2000, Joint Event Location – The JHD Technique and Applications to Data From Local Seismic Networks, Advances in Seismic Location, 163-204.
Putri, Y.T., 2012, Relokasi Gempabumi Utama Dan Gempabumi Susulan Menggunakan Metode MJHD (Studi Kasus Gempabumi Mentawai 25 Oktober 2010), Skripsi, Depok: Universitas Indonesia
Sieh, 2000, Nanotectonics of the Sumatran fault, Indonesia, Journal of geophysical research, Vol 105
Subardjo, dan Ibrahim, G., 2004, Pengetahuan Seismologi, Jakarta: Badan Meteorologi dan Geofisika.
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