Analysis of coseismic fault slip models of the 2012 Indian ocean earthquake: Importance of GPS data for crustal deformation studies

Endra Gunawan, Putra Maulida, Irwan Meilano, Masyhur Irsyam, Joni Efendi

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Based on continuous GPS data, we analyze coseismic deformation due to the 2012 Indian Ocean earthquake. We use the available coseismic slip models of the 2012 earthquake, derived from geodetic and/or seismic waveform inversion, to calculate the coseismic displacements in the Andaman-Nicobar, Sumatra and Java. In our analysis, we employ a spherical, layered model of the Earth and we find that Java Island experienced coseismic displacements up to 8 mm, as also observed by our GPS network. Compared to coseismic offsets measured from GPS data, a coseismic slip model derived from multiple observations produced better results than a model based on a single type of observation.

Original languageEnglish
Pages (from-to)2136-2150
Number of pages15
JournalActa Geophysica
Volume64
Issue number6
DOIs
Publication statusPublished - 1 Dec 2016
Externally publishedYes

Keywords

  • GPS displacement
  • coseismic deformation
  • the 2012 Indian Ocean earthquake

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