RELOKASI HIPOSENTER GEMPABUMI DENGAN MENGGUNAKAN METODE DOUBLE DIFFERENCE (STUDI KASUS: ZONA BUSUR BANDA PADA TAHUN 2010 – 2017)

Meliza Anggraeni, - (2018) RELOKASI HIPOSENTER GEMPABUMI DENGAN MENGGUNAKAN METODE DOUBLE DIFFERENCE (STUDI KASUS: ZONA BUSUR BANDA PADA TAHUN 2010 – 2017). S1 thesis, Universitas Pendidikan Indonesia.

Abstract

Zona Busur Banda merupakan salah satu wilayah yang tingkat seismisitasnya sangat tinggi serta rawan terhadap bencana gempabumi karena adanya penunjaman lempeng Indo-Australia terhadap lempeng Eurasia di sepanjang pelengkungan Busur Banda, tercatat selama 8 tahun terakhir ini sudah terjadi gempabumi sebanyak 4518 kali. Data katalog yang presisi sangat dibutuhkan sebagai data referensi untuk studi tektonik dan studi kegempaan. Karena informasi mengenai hiposenter yang akurat sangat penting, maka untuk menghasilkan hiposenter yang lebih akurat dilakukan relokasi hiposenter gempabumi dengan menggunakan metode Double Difference (DD). Metode Double Difference (DD) adalah suatu metode relokasi hiposenter yang menggunakan data arrival time gelombang P dan S. Pada dasarnya prinsip dari metode ini adalah mengasumsikan jika jarak persebaran hiposenter antara dua gempabumi sangat kecil dibandingkan dengan jarak antara stasiun dengan sumber gempabumi, maka raypath kedua gempabumi tersebut dapat dianggap sama. 1210 event gempabumi berhasil direlokasi dengan nilai resudual waktu tempuh yang mendekati nol. Hasil ini menunjukkan bahwa relokasi hiposenter menggunakan metode Double Difference dengan bantuan program hypoDD relatif akurat untuk digunakan merelokasi gempabumi Zona Busur Banda pada tahun 2010-2017, serta membuktikan bahwa wilayah Busur Banda membentuk seperti sendok terbuka berdasarkan hasil geometri slab-nya. ;---The Banda Arc is a territory with a very high level of seismicity and vulnerable to earthquake, because of the collision of Indo-Australia plate against the Eurasian plate along the curvature of the Banda Arc. It is recorded that 4518 earthquakes has occoured in the past 8 years. A precise catalog data is urgently needed as a reference data for tectonics and seismicity studies. For the need of accurate information of hypocenter, earthquake hypocenter relocation using the Double- Difference (DD) method was done to obtain more precise information of hypocenter. Double-Difference (DD) is a hypocenter relocation method using arrival time data of P and S waves. This method assumes that if the distance of hypocenter distribution between two earthquakes is very small compared to the distance between stations and earthquake source, then the raypath of those earthquakes can be considered the same. 1210 earthquakes are successfully relocated with the residual value of travel time approaching zero. These results indicate that the relocation of hypocenter using Double Difference method with the help of hypoDD program is relatively accurate for relocating earthquake on Banda Arc Zone in 2010-2017, as well as proving that the area of Banda Arc formed as an opened spoon based on its slab geometry. The residual value of travel time approaching zero are expected to provide more precise information of hypocenter position to government agencies and society as disaster mitigation in earthquake vulnerability mapping in order to minimize the damage of earthquake.

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Official URL: http://repository.upi.edu
Item Type: Thesis (S1)
Additional Information: No. Panggil : S FIS MEL r-2018; Nama Pembimbing : I. Pepen Supendi,II. Nanang Dwi Ardi; NIM : 1400332.
Uncontrolled Keywords: relokasi hiposenter, metode double difference, hypoDD, Busur Banda. hypocenter relocation, double difference method, hypoDD, Banda Arc.
Subjects: G Geography. Anthropology. Recreation > G Geography (General)
T Technology > T Technology (General)
Divisions: Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam > Program Studi Fisika - S1
Depositing User: Ryan Taufiq Qurrohman
Date Deposited: 23 Jan 2020 02:27
Last Modified: 23 Jan 2020 02:27
URI: http://repository.upi.edu/id/eprint/45162

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