Application of 3D back-projection for source properties of large events using small sets of well distributed seismic stations

Studies of earthquake source characterization are often undertaken using the back-projection technique and large, dense seismic arrays. Combinations of such arrays have also been utilised in an attempt to increase the spatial resolution of the source energy distribution patterns. However our tests show that the use of few well selected seismic stations can produce comparable results to those obtained by the processing of large seismic arrays. Employing dense arrays of seismic stations may increase the signal to noise ratio, but this is not the reason behind apparent improvements in resolution of radiated energy patterns. In practice, resolution of the source energy radiation pattern relies on the same principles as those which underline earthquake hypocentre location. Back-projection techniques applied to large Mw > 7 subduction earthquakes shows that starting with small numbers of spatially separated seismic stations the correct distribution of radiated energy can be estimated. The set of spatially separated seismic stations can be selected by the same criteria as those used for accurate hypocentral location to map radiated seismic energy not only in a plane but in 3D as well. Application of this algorithm to a number of deep (>100km) earthquakes, such as the Mw 8.2 Sea of Okhotsk event, shows the further potential of the back-projection technique.

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Date (Publication)
2013-01-01T00:00:00
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/76989

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Geoscience Australia

 Canberra
Author

Gorbatov, A.

 1
Author

Spiliopoulos, S.

 2
Author

Kennett, B.L.N.

 3
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CSEMD
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Commonwealth of Australia (Geoscience Australia)
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Commonwealth of Australia (Geoscience Australia)

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Product data repository: Various Formats

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Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes

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Australian and New Zealand Standard Research Classification (ANZSRC)

  • Earth Sciences

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Creative Commons Attribution 4.0 International Licence

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CC-BY

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4.0

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http://creativecommons.org/licenses/

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Australian Government Security ClassificationSystem

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2018-11-01T00:00:00
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Unclassified
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English
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UTF8

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Commonwealth of Australia (Geoscience Australia)

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Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/e3cc804e-d891-277a-e044-00144fdd4fa6

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GeoNetwork UUID

Language
English
Character encoding
UTF8
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Commonwealth of Australia (Geoscience Australia)

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Non geographic dataset
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nonGeographicDataset

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Geoscience Australia - short identifier for metadata record with

uuid

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eCatId/76989

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https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/e3cc804e-d891-277a-e044-00144fdd4fa6

Date info (Revision)
2018-04-20T06:09:14
Date info (Creation)
2013-08-13T00:00:00

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AU/NZS ISO 19115-1:2014

Metadata standard

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ISO 19115-1:2014

Metadata standard

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ISO 19115-3

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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

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Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

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