Novianti, Chi Chi (2016) Penentuan Hiposenter Gempabumi Dan Model Kecepatan Lokal Di Wilayah Jawa Timur Menggunakan Metode Double Difference. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Jawa Timur, secara fisiologis maupun geografis,
terdapat gunungapi dan sesar yang masih aktif serta berpotensi
terjadi gempabumi. Penelitian ini dilakukan untuk mengetahui
model kecepatan bumi lokal 1-D, menentukan distribusi
persebaran hiposenter dan hasil relokasi hiposenter gempabumi
berdasarkan kejadian yang digunakan menggunakan metode
double difference yang terjadi di wilayah Jawa Timur.
Data yang digunakan dalam penelitian ini data gempa
tahun 2007 sampai 2015 di wilayah Jawa Timur. Penelitian ini
menggunakan metode double difference yaitu metode yang
menggunakan data relatif waktu tempuh antar dua hiposenter.
Prinsip metode ini adalah jika jarak persebaran hiposenter
antara dua gempa sangat kecil dibanding jarak antara stasiun ke
sumber, maka ray path gempa dapat dianggap mendekati sama.
Hasil yang diperoleh yaitu, model kecepatan bumi lokal
1-D yang diperoleh 5 lapisan dengan kecepatan 4,71 km/s - 7,14
km/s dan moho pada kedalaman mendekati 30 km. Hasil relokasi
hiposenter menggunakan metode double difference menunjukkan
bahwa metode ini mampu memberikan hasil koordinat episenter
yang akurat dengan diperolehnya nilai Rms residual mendekati
0. Adanya penelitian ini dapat dijadikan sebagai salah satu
upaya mitigasi bencana untuk masyarakat di Jawa Timur.
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East Java, physiologically and geographically, has
volcanoes and faults which are still active and potentially
resulting in earthquake disaster. This study is conducted to
determine the local earth velocity model 1-D, determine the
distribution of the hypocenter distribution and relocation of
earthquake hypocenter based on event which applied using
double difference method that occurred in East Java.
The data is used in this study from seismic data in 2007
until 2015 in East Java. This study uses a double-difference
method which is a method to use the data of time travel relativity
between hypocenters. The principle of this method is that if the
distance between two earthquake hypocenter distributions is
small compared to the distance between the station and the
source, the raypath can be considered as approximating same.
The result from this study shows that local earth velocity
model 1-D gained 5 layers at 4,71 km/s - 7,14 km/s and moho
located at 30 km. The result of the hypocenter relocation using
double-difference method shows that this method is able to
accurately provide the coordinates of the epicenter by obtaining
the Rms value approximating 0. The existence of this research
can be used as disaster mitigation for communities in East Java.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSFi 624.176 2 Nov p |
| Uncontrolled Keywords: | double difference, model kecepatan lokal, relokasi, subduksi Jawa Timur |
| Subjects: | G Geography. Anthropology. Recreation > GB Physical geography Q Science > QC Physics > QC866.5 Climatology--Forecasting. |
| Divisions: | Faculty of Mathematics and Science > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | EKO BUDI RAHARJO |
| Date Deposited: | 24 Oct 2019 08:45 |
| Last Modified: | 24 Oct 2019 08:45 |
| URI: | http://repository.its.ac.id/id/eprint/71398 |
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