Earthquake Relocation Using Double Difference Method for 2D Modelling of Subducting Slab and Back Arc Thrust in West Nusa Tenggara
DOI:
https://doi.org/10.26740/jpfa.v8n2.p132-143Keywords:
earthquake relocation, double difference method, subduction, back arc thrustAbstract
West Nusa Tenggara is classified into earthquake prone zone as it is located between subduction and back arc thrust earthquake sources. Accurate hypocenter determination in this area is necessary for strong motion calculation and earthquake source zone modelling. Earthquake relocation in the region is needed to produce a more accurate hypocenter location and 2D modelling of subduction slab and back arc thrust. A double difference method was employed with earthquake data from 2009-2017. The results show better accuracy in the distribution of the travel-time residual. Subduction slab modelling shows a dip value of about 7-13° from a trench to an arc, 49-55° from an arc to a transition zone, and 60-64° dip at a depth of 300 km. Back arc thrust modelling shows a dip value of about 19-28° at a depth of 15-30 km. The results provide a reliable 2D model for subduction slab and back arc thrust in West Nusa Tenggara. Therefore, the developed models can be used as reference for earthquake zones and seismic hazard assessment in West Nusa Tenggara.
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Setiadi TAP and Rohadi S. Relokasi Gempa Bumi Teleseismic Double-Difference di Wilayah Bali - Nusa Tenggara dengan Model Kecepatan 3D Teleseismic. Jurnal Lingkungan dan Bencana Geologi. 2018; 9(1): 45-52. Available from: http://jlbg.geologi.esdm.go.id/index.php/jlbg/article/view/149.
Nugraha AD, Kusnandar R, Puspito N, Sakti A, and Yudistira T. Preliminary results of local earthquake tomography around Bali, Lombok, and Sumbawa regions. AIP Conference Proceeding, 2015; 1658: 030019. DOI: https://dx.doi.org/10.1063/1.4915027.
Ashadi AL, Harmoko U, Yuliyanto G, and Kaka SI. Probabilistic Seismic-Hazard Analysis for Central Java Province, Indonesia. Bulletin of the Seismological Society of America. 2015; 105(3): 1711-1720. DOI: https://dx.doi.org/10.1785/0120140277.
Sunardi B, Istikomah MU, and Sulastri. Analisis Seismotektonik dan Periode Ulang Gempabumi Wilayah Nusa Tenggara Barat, Tahun 1973-2015. Jurnal Riset Geofisika Indonesia. 2017; 1(1) : 23-28. Available from: https://www.academia.edu/33021958/Analisis_Seismotektonik_dan_Periode_Ulang_Gempabumi_Wilayah_Nusa_Tenggara_Barat_Tahun_1973-2015?auto=download.
Widiyantoro S and Fauzi. Note on Seismicity of the Bali Convergent Region in the Eastern Sunda Arc Indonesia. Australian Journal of Earth Sciences. 2005; 52(3): 379-383. DOI: https://dx.doi.org/10.1080/08120090500136683.
Waldhauser F. hypoDD -- A Program to Compute Double-Difference Hypocenter Locations. U.S. Geological Survey Open-File Report 01. 2011; 113: 1-25. DOI: https://dx.doi.org/10.3133/ofr01113.
Madrinovella I, Widiyantoro S, and Meilano I. Relokasi Hiposenter Gempa Padang 30 September 2009 Menggunakan Metode Double Difference. JTM. 2011; XVIII(1): 3-10. Available from: https://www.academia.edu/31900522/RELOKASI_HIPOSENTER_GEMPA_PADANG_30_SEPTEMBER_2009_MENGGUNAKAN_METODE_DOUBLE_DIFFERENCE.
Ramdhan M and Nugraha DA. Studi Kegempaan Area Selat Sunda dan Sekitarnya Berdasarkan Hasil Relokasi Hiposenter Menggunakan Metode Double Difference. JTM. 2012; XIX(4): 184-189.
Mahendra R, Rohadi S and Rudyanto A. Attenuation Relation for Strong Motion in Eastern Java Based On Appropriate Database and Method. AIP Conference Proceedings. 2017; 1857(1): 080002. DOI: https://dx.doi.org/10.1063/1.4987096.
Listyaningrum Z. Analisis Pola Subduksi Ganda Laut Maluku Menggunakan Metode Irisan Vertikal. Undergraduate Thesis. Unpublished. Tangerang Selatan: STMKG; 2014.
Waldhauser F and Schaff D. Regional and Teleseismic Double-Difference Earthquake Relocation Using Waveform Cross-Correlation and Global Bulletin Data. Journal of Geophysical Research: Solid Earth. 2007; 112(12): 1-18. DOI: https://dx.doi.org/10.1029/2007JB004938.
Utama MRJ. Studi Kegempaan Regional Center Ix Bmkg Maluku Berdasarkan Hasil Relokasi Hiposenter Dengan Menggunakan Hypodd. Undergraduated Thesis. Unpublished. Bandung: Institut Teknologi Bandung; 2013.
BMKG. BMKG Data Repository. Available from: http://repogempa.bmkg.go.id/query.php. 2018.
Kennett BLN, Engdahl ER, and Buland R. Constraint on Seismic Velocities in the Earth from Traveltimes. Geophysical Journal International. 1995; 122(1): 108-124. DOI: https://dx.doi.org/10.1111/j.1365-246X.1995.tb03540.x.
Mahendra R, Supriyanto FNU, and Rudyanto A. Relokasi dan Klasifikasi Gempabumi untuk Database Strong Ground Motion di Wilayah Jawa Timur. Jurnal Meteorologi Klimatologi dan Geofisika. 2016; 3(3): 46-51. Available from: https://jurnal.stmkg.ac.id/index.php/jmkg/article/view/15.
Dancer D and Tremayne AR. R-Squared and Prediction in Regression with Ordered Quantitative Response. Journal of Applied Statistics. 2005; 32(5): 483-493. DOI: https://doi.org/10.1080/02664760500079423.
Waldhauser F and Ellsworth WL. A Double-Difference Earthquake Location Algorithm: Method and Application to the Northern Hayward Fault, California. Bulletin of the Seismological Society of America. 2000; 90(6): 1353-1368. DOI: http://dx.doi.org/10.1785/0120000006.
Taruna RM, Rohadi S, Rudyanto A and Heryanto DT. Penentuan Ground Motion Prediction Equations (GMPEs) dengan Metode Euclidean dan Likelihood untuk Wilayah Jawa Timur. Jurnal Meteorologi dan Geofisika. 2016; 17(3): 177-189. Available from: http://puslitbang.bmkg.go.id/jmg/index.php/jmg/article/viewFile/357/pdf.
Hayes GP, Wald DJ, and Johnson RL. Slab 1.0: A Three Dimensional Model of Global Subduction Zone Geometries. Journal of Geophysical Research B: Solid Earth. 2012; 117(B1): B01302. DOI: https://dx.doi.org/10.1029/2011JB008524.
Widiyantoro S, Pesicek JD, and Thurber C. Subducting Slab Structure below the Eastern Sunda Arc Inferred from Non-Linear Seismic Tomographic Imaging Geological Society, London, Special Publications Subducting Slab Structure below the Eastern Sunda Arc Inferred from Non-Linear Seismic Tomography. Geological Society London Special Publications. 2011; 355: 139-155. DOI: https://dx.doi.org/10.1144/SP355.7.
Setiadi TAP and Rohadi S. Relokasi Gempa Bumi Teleseismic Double-Difference di Wilayah Bali - Nusa Tenggara dengan Model Kecepatan 3D Teleseismic. Jurnal Lingkungan dan Bencana Geologi. 2018; 9(1): 45-52. Available from: http://jlbg.geologi.esdm.go.id/index.php/jlbg/article/view/149.
Nugraha AD, Kusnandar R, Puspito N, Sakti A, and Yudistira T. Preliminary results of local earthquake tomography around Bali, Lombok, and Sumbawa regions. AIP Conference Proceeding, 2015; 1658: 030019. DOI: https://dx.doi.org/10.1063/1.4915027.
Ashadi AL, Harmoko U, Yuliyanto G, and Kaka SI. Probabilistic Seismic-Hazard Analysis for Central Java Province, Indonesia. Bulletin of the Seismological Society of America. 2015; 105(3): 1711-1720. DOI: https://dx.doi.org/10.1785/0120140277.
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Published
2018-12-31
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Taruna, R. M. and Banyunegoro, V. H. (2018) “Earthquake Relocation Using Double Difference Method for 2D Modelling of Subducting Slab and Back Arc Thrust in West Nusa Tenggara”, Jurnal Penelitian Fisika dan Aplikasinya (JPFA), 8(2), pp. 132–143. doi: 10.26740/jpfa.v8n2.p132-143.
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