Double difference relocation of earthquakes in Sunda-Banda transition zone, Indonesia

Accurate earthquake hypocenter location is very important for seismicity analysis. In this study we used 593 earthquakes information from International Seismological Center (ISC) catalogue from January 2009 to December 2016 for hypocenter relocation in Sunda-Banda transition zone. We applied double...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 1191; no. 1; pp. 12012 - 12017
Main Authors Saputra, F R T, Syuhada, S, Anggono, T
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.03.2019
Subjects
Earthquakes
Relocation
Seismicity
Seismology
Subduction (geology)
Indonesia
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Summary:Accurate earthquake hypocenter location is very important for seismicity analysis. In this study we used 593 earthquakes information from International Seismological Center (ISC) catalogue from January 2009 to December 2016 for hypocenter relocation in Sunda-Banda transition zone. We applied double difference method and one dimensional AK135 for the velocity model. The result shows that position and orientation of earthquakes are changed significantly. Distribution of earthquakes are narrower in the subducting slab, which is associated to the geological setting in this region. A prominent feature found in this study is a lack of seismicity between 240 and 400 km depth that could be related to stress transition from extensional to compressional regime. Another feature is aseismic zone within 100 -120 km depth around 120°E in the subducting slab which suggest a presence of a slab window.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1191/1/012012