Open AccessShear Wave Splitting Analysis Beneath Sumatra For-Arc Inferred from Broadband Seismic Network Station
Author(s) -
Lewi Ristiyono,
Chichi Nurhafizah,
Suhenri Purba,
Manihar Situmorang
Publication year - 2021
Publication title -
journal of computation physics and earth science
Language(s) - English
Resource type - Journals
ISSN - 2776-2521
DOI - 10.53842/jocpes.v1i1.3
Subject(s) - seismology , geology , shear wave splitting , anisotropy , broadband , epicenter , shear (geology) , arc (geometry) , waveform , seismic anisotropy , geophysics , geometry , petrology , optics , mantle (geology) , telecommunications , physics , radar , mathematics , computer science
The observation of broadband network seismic had been deployed in Sumatra For-Arc. The waveform data for this study were recorded from January 2014 – December 2016. The earthquake event data were selected with the epicenter of around 950 – 1800 in distance and Magnitude with more than 7 Mw. In this case, we use shear wave splitting to determine an anisotropic structure in Sumatra For-arc. Seismic Anisotropy can perform as a tool to classify and observe anisotropic structures of subsurface deformation processes beneath Sumatra For-Arc. The valid outcomes, in this case, have been gained that they only correspond to the upper layer, which has the delay time duration of 0.5 – 0.8 s is the anisotropic layer located in the Mentawai Island. The fast an anisotropic polarization direction found in Sumatra For-arc are parted into NE-SW direction found on the upper layer.