Review paper: The 10th March 1970 Mw 5.0 Calingiri surface rupturing earthquake, Australia

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Authors

Tamarah R King , Mark Quigley , Dan Clark 

Abstract

The 10th March 1970 moment magnitude (Mw) 5.0 Calingiri earthquake surface rupture is 3.3 km long with a maximum vertical displacement of 0.4 m. The fault as defined by surface measurements is a shallow-dipping reverse fault (~ 20° east) with a probable shallow hypocentre (< 1 km). This is consistent with published hypocentral depths, though large uncertainties exist within the seismological data. The finest-resolution geological map available for the epicentral area (1:250 000) indicates the presence of granitic gneiss and migmatite outcrops within a few kilometres of the surface rupture with foliations striking sub-parallel to the surface rupture trace but with near-vertical dips. The rupture is subparallel to linear geophysical anomalies suggesting a bedrock structural control to faulting. There is no evidence to suggest prior Pleistocene surface rupture along the Calingiri scarp, although no detailed palaeoseismic investigations have been conducted.

DOI

https://doi.org/10.31223/osf.io/egw4c

Subjects

Earth Sciences, Geology, Geophysics and Seismology, Physical Sciences and Mathematics, Tectonics and Structure

Keywords

australian earthquake, surface rupture, Environmental earthquake effects, Environmental seismic intensity scale, intraplate earthquake, reverse fault, ESI scale

Dates

Published: 2019-08-17 17:55

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License

CC BY Attribution 4.0 International

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