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Seismicity studies at Moluccas area based on the result of hypocenter relocation using HypoDD

2015; American Institute of Physics; Volume: 1657; Linguagem: Inglês

10.1063/1.4915030

1935-0465

Muhammad Reza July Utama, Andri Dian Nugraha, Nanang T. Puspito,

Seismology and Earthquake Studies

The precise hypocenter was determined location using double difference method around subduction zone in Moluccas area eastern part of Indonesia. The initial hypocenter location from MCGA data catalogue of 1,945 earthquake events. Basically the principle of double-difference algorithm assumes if the distance between two earthquake hypocenter distribution is very small compared to the distance between the station to the earthquake source, the ray path can be considered close to both earthquakes. The results show the initial earthquakes with a certain depth (fix depth 10 km) relocated and can be interpreted more reliable in term of seismicity and geological setting. The relocation of the intra slab earthquakes beneath Banda Arc are also clearly observed down to depth of about 400 km. The precise relocated hypocenter will give invaluable seismicity information for other seismological and tectonic studies especially for seismic hazard analysis in this region.