Large-scale crustal structure beneath Singapore using receiver functions from a dense urban nodal array

This is a Preprint and has not been peer reviewed.

Downloads

Download Preprint

Supplementary Files
Authors

Karen H Lythgoe , Miranda Ong Su Qing, Shengji Wei

Abstract

Geophysics has a role to play in the development of smart cities, for example through geohazard mitigation and subsurface imaging for underground construction. This is particularly true for Singapore, one of the worlds most densely populated countries. Imaging of Singapores subsurface is required to identify geological faults, model shaking from future earthquakes and provide a framework for underground development. A non-invasive geophysical technique that is well suited for urban areas is passive seismic surveys using nodes. Here, we image Singapores crustal structure using receiver functions generated by a 40-day deployment of a dense nodal array. We generate high resolution receiver functions, despite the noisy environment and short recording time and also create common-conversion point images. Our results reveal a complex crustal structure, containing multiple discontinuities. Azimuthal variations indicate a distinct change in crustal structure on either side of the postulated Bukit Timah fault, which has implications for seismic hazard.

DOI

https://doi.org/10.31223/osf.io/46wms

Subjects

Earth Sciences, Geophysics and Seismology, Physical Sciences and Mathematics

Keywords

Seismology, receiver functions, seismic nodes, smart cities, urban geophysics

Dates

Published: 2020-02-20 06:36

Older Versions
License

GNU Lesser General Public License (LGPL) 2.1

Add a Comment

You must log in to post a comment.


Comments

There are no comments or no comments have been made public for this article.