Crustal structure in the southern part of Central Java based on analysis of tele-seismic receiver function using a neighbourhood algorithm

P. Ariyanto, Syuhada, Mohammad Syamsu Rosid, T. Anggono, Y. Januarti

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)

Abstract

In this study, we applied receiver functions analysis to determine the crustal thickness, the ratio of Vp/Vs and the S wave velocity in the southern part of the Central Java. We selected tele-seismic data with magnitude more than 6 (M>6) and epicenter distance 30°-90° recorded from 3 broadband stations: UGM, YOGI, and WOJI station, as part of Indonesia-Geophone Network (IA-GE). Inversions were performed using nonlinear Neighborhood Algorithm (NA). We observed Ps phase conversion on the receiver functions corresponding to Moho depth at around 36-39 km. We also observed strong negative phase arrivals at around 10-12 s which might be associated with Indo-Australian subducting slab underneath the stations. The inversion results show the presence of low velocity zone with high Vp/Vs ratio (>1.78) in the middle crust around the study area which could be related to the Merapi-Lawu Anomaly (MLA).

Original languageEnglish
Article number012018
JournalJournal of Physics: Conference Series
Volume985
Issue number1
DOIs
Publication statusPublished - 19 Mar 2018
Event3rd International Symposium on Frontier of Applied Physics, ISFAP 2017 - Jakarta, Indonesia
Duration: 23 Oct 201724 Oct 2017

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