Yusuf, Ryandi Bachrudin (2016) Persebaran Hiposenter Maluku Selatan Menggunakan Metode Double Difference. Undergraduate thesis, Institut Teknologi Sepuluh Nopember Surabaya.
Preview |
Text
1112100090-Undergraduate_Thesis.pdf - Published Version Download (1MB) | Preview |
Abstract
Wilayah Maluku Selatan merupakan wilayah bagian
timur Indonesia dengan potensi gempa yang tinggi. Salah satu
penyebab daerah ini rawan gempa adalah tatanan lempeng
tektonik yang masuk dalam zona tektonik kompleks, yaitu zona
pertemuan lempeng Eurasia, lempeng Filipina, dan lempeng
Pasifik, serta pada bagian Pulau Seram merupakan perbatasan
zona subduksi lempeng Indo-Australia. Sebagai upaya mitigasi
bencana gempa bumi, perlu adanya studi kegempaan berupa
relokasi hiposenter dan menganalisa persebaran hiposenter di
wilayah Maluku Selatan. Prinsip metode double difference ini
adalah jika ada dua gempa yang saling berdekatan, dimana jarak
relative antar gempa lebih kecil daripada jarak relative gempa ke
stasiun perekam, maka raypath dan waveform dapat dianggap
sama, sehingga kesalahan akibat model kecepatan bisa
diminimalkan. Hasil relokasi menggunakan metode double
difference mampu memberikan hasil yang lebih akurat, hal ini
ditunjukkan dengan nilai RMS hasil relokasi yang jauh lebih baik
(mendekati nol) dibandingkan dengan nilai RMS sebelum
relokasi. Persebaran hiposenter gempa banyak terjadi dekat
patahan, dan zona subduksi lempeng, pergeseran episenter
lebih terkumpul pada satu titik dan kedalaman hiposenter
lebih tersebar (keluar dari fixed depth) didominasi antara 2-
50 Km
================================================================================================
South Maluku is the eastern part of Indonesia with high
earthquake potential. One of the reason that caused it happen is
setting of tectonic plates on South Maluku the complex tectonic
zone, a collision zone of the Eurasian plate, Philippine plate and
the Pacific plate, and on the Seram Island is the subduction zone
of the Indo-Australian plate. Therefore earthquake disaster, need
a studies seismology in order to mitigation, with relocation
hypocenter and distribution analyze in the region of South
Maluku. The principle of double difference method if there were
two earthquakes pair to each other, where the relative distance
between the earthquake is smaller than the distance relative to
the seismic recording station, then raypath and waveform can be
considered similar, so the errors due to velocity models can be
minimized. The result of using the method of double difference
relocation is able to provide more accurate results, as shown by
the RMS value of the relocation results much better (close to
zero) than the RMS value before relocation. Distribution of
earthquake hypocenter occur near faults and plate subduction
zones, shifting the epicenter location is collected at one point and
the depth of the hypocenter is spread (out of the fixed depth)
dominated between 2-50 Km.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSFi 624.176 2 Yus p |
| Uncontrolled Keywords: | Double difference, Maluku Selatan, persebaran, relokasi hiposenter, residual |
| Subjects: | Q Science > QE Geology > QE538.8 Earthquakes. Seismology |
| Divisions: | Faculty of Natural Science > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | EKO BUDI RAHARJO |
| Date Deposited: | 12 Feb 2020 10:05 |
| Last Modified: | 12 Feb 2020 10:06 |
| URI: | http://repository.its.ac.id/id/eprint/74845 |
Actions (login required)
 |
View Item |