Informing seismic hazard with geodesy & remote-sensing from Türkiye to Central Asia  


Authors / CoAuthors

King, T.

Abstract

<div>COMET (The Centre for Observation and Modelling of Earthquakes, Volcanoes and Tectonics) uses satellite measurements alongside ground-based observations and geophysical models to study active faults and earthquakes. This talk provides an overview of COMET research products in Türkiye and Central Asia, where interseismic deformation and active faults are directly observable. It also touches on how these products highlight the complexity and difficulty of seismic hazard modelling in Australia.&nbsp;</div><div>Three COMET datasets will be discussed, which each contribute to seismic hazard models. Researchers at COMET have and continue to pioneer INSAR methods including co-seismic interferograms and time-series modelling. For example, the Türkiye (Türkiye) INSAR strain-rate map directly estimates strain-accumulation across faults, while the LICSAR portal and satellite cross-correlation methods are used to quantify co-seismic and post-seismic deformation (including after the devastating 2023 Türkiye-Syria earthquake).&nbsp;</div><div>Similar methods are applied in the Tien Shan, where active faults are identifiable in satellite imagery and elevation data, but rates of activity are uncertain and expensive to obtain through field work. Here COMET and GEM (the Global Earthquake Model) are collaborating to produce block-model informed PSHA inputs using active fault databases, GNSS, and INSAR.&nbsp;</div><div>While these methods are useful in tectonically active regions, they serve to highlight the difficulties facing Australian seismic hazard modelling where similar methods cannot be used due to low (to unobservable) tectonic strain and very long fault recurrence.&nbsp;</div> This paper was presented to the 2023 Australian Earthquake Engineering Conference 23-25 November 2023 (https://aees.org.au/aees-conference-2023/)

Product Type

document

eCat Id

148972

Contact for the resource

  Resource provider

 

  Point of contact

Commonwealth of Australia (Geoscience Australia)  
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia

  Point of contact

 

Keywords

  • seismic hazard
  • geodesy
  • active fault
  • InSAR
  • turkey
  • central asia
  • Australia
theme.ANZRC Fields of Research.rdf
  • Geodesy
  • Published_External

Publication Date

2024-01-08T02:29:53

Creation Date

Security Constraints

Australian Government Security Classification System    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

Use - license otherRestrictions

Status

completed

Purpose

Contribution to the Australian Earthquake Engineering Society meeting 2023

Maintenance Information

asNeeded

Topic Category

geoscientificInformation

Series Information

Australian Earthquake Engineering Conference 23-25 November 2023

Lineage

<div>Draft - 11/10/2023</div><div>Final draft (reviewed by J Dawson) - 24/11/2023</div><div>Final version - 21/12/2023</div><div>Uploaded to conference website - 21/12/2023</div>

Parent Information

Extents

[-44.0362, -11.2449, 112.5581, 155.3488]

Reference System

Spatial Resolution

Service Information

Associations

Downloads and Links

Link to Paper  

Link to AEES Conference 2023 Page  

Source Information