Site Characterization for ANSN Stations Using the Ellipticity Curve Inversion of Microtremor data  


Authors / CoAuthors

Ebrahimi, R. | Ghasemi, H. | Allen, T.

Abstract

<div>The site-specific shear velocity profile for the top 30 m, VS30, is the most popular geotechnical parameter to characterize local site conditions. Shear velocity measurements are not available for the majority of earthquake-recording stations in the Australian National Seismograph Network (ANSN). Accordingly, the lack of available shear-wave velocity data in Australia makes it difficult to benchmark amplification effects to a reference site condition. One inexpensive and relatively efficient method that can be used to analyse single-station ambient noise data is the Horizontal to Vertical Spectral Ratio (HVSR) method. We used OpenHVSR software for the inversion of the HVSR curves. The S-wave velocity structure and VS30 results derived from the inversion process of the HVSR curves are in a good agreement with the previous Spatial Autocorrelation (SPAC) study for the ANSN stations and can be used as a fast and inexpensive technique to measure the VS30 for site classification purposes.&nbsp;</div><div><br></div>This Abstract was submitted/presented to the 2022 Australian Earthquake Engineering Society (AEES) Conference 24-25 November (https://aees.org.au/aees-conference-2022/)

Product Type

document

eCat Id

147264

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Commonwealth of Australia (Geoscience Australia)  
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
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Keywords

( Project )
  • National Seismic Hazard Assessment
  • HVSR inversion
  • Shear wave Velocity
  • Site Characterization
  • Microseism Noise
theme.ANZRC Fields of Research.rdf
  • Seismology and Seismic Exploration
  • Published_External

Publication Date

2023-02-24T00:40:31

Creation Date

2022-09-16T18:00:00

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Australian Government Security Classification System    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

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Status

completed

Purpose

Australian Earthquake Engineering Society Paper

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notPlanned

Topic Category

geoscientificInformation

Series Information

Australian Earthquake Engineering Society (AEES) Conference 24-25 November 2022 Mt Macedon VIC

Lineage

<div>National Seismic Hazard Assessment</div>

Parent Information

Extents

[-54.75, -9.2402, 112.92, 159.11]

Reference System

Spatial Resolution

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