Abstract
A research about earthquake relocation in Northern Bali Island in 2015 – 2017 using the Double Difference (DD) method has been carried out. Earthquake relocation is important to get some informations about earthquake locations with high accuracy, fault zone identification, earthquake distribution and seismic analysis. The results of the relocation indicated that there was a displacement of the location of earthquake that formed moving closer to the earthquake source namely a fault. Relocation using HypoDD program gave high accurate result indicated by the RMS residual time value close to zero e.g. 0,000 - 0.01 which mean the results of calculations and observations are closed to the real value.
Highlights
A research about earthquake relocation in Northern Bali Island in 2015 – 2017 using the Double Difference (DD) method has been carried out
important to get some informations about earthquake locations with high accuracy
that there was a displacement of the location of earthquake
Summary
Data yang digunakan merupakan data katalog gempabumi stasiun BMKG Wilayah 3 Denpasar dengan periode waktu 1 Januari 2015 sampai 31 Desember 2017 yaitu sebanyak 507 gempa bumi. Wilayah penelitian Pulau Bali bagian utara dengan koordinat 7,00 LS - 8,42 LS dan 114,35 BT - 115,80 BT. Format data terdiri dari parameter gempabumi berupa waktu tiba gelombang (origin time), lintang, bujur dan kedalaman. Stasiun yang digunakan adalah 48 stasiun yang tersebar di Bali dan sekitarnya. Data stasiun yang digunakan meliputi lintang dan bujur. Relokasi gempa bumi dengan metode DD dilakukan dengan program HypoDD. Progam ini terdiri atas dua program yaitu program ph2dt untuk pengelompokan data gempabumi dan program HypoDD untuk merelokasi data gempabumi
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