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Improving microseismic P wave source location with multiple seismic arrays

Improving microseismic P wave source location with multiple seismic arrays
Improving microseismic P wave source location with multiple seismic arrays
Using array analysis, the direction and distance to a seismic P wave source can be determined. However, individual arrays are limited in their geographical coverage and by their resolving capability, which is determined by the array aperture, configuration, and number of stations. We demonstrate these limitations on three large seismic arrays located in Japan, Europe, and California, and find that all give a unique but imperfect insight into the P wave sources acting in the North Pacific. We then combine the data from all three arrays into one beamforming image. The combined images bring together the views offered by each array, providing a concise, comprehensive, and more robust representation of multiple source locations. Next we weight each array for distance in order to optimize the result. Being able to resolve and accurately locate source regions is an important step in being able to use seismic records to monitor ocean wave activity and track storms in real time.
2169-9356
Neale, Jennifer
c2db9a29-ed27-401c-b3f9-46dea77576f5
Harmon, Nicholas
10d11a16-b8b0-4132-9354-652e72d8e830
Srokozs, Meric
623b7e1d-522c-42de-a1f2-931fe6c22d40
Neale, Jennifer
c2db9a29-ed27-401c-b3f9-46dea77576f5
Harmon, Nicholas
10d11a16-b8b0-4132-9354-652e72d8e830
Srokozs, Meric
623b7e1d-522c-42de-a1f2-931fe6c22d40

Neale, Jennifer, Harmon, Nicholas and Srokozs, Meric (2018) Improving microseismic P wave source location with multiple seismic arrays. Journal of Geophysical Research: Solid Earth. (doi:10.1002/2017JB015015).

Record type: Article

Abstract

Using array analysis, the direction and distance to a seismic P wave source can be determined. However, individual arrays are limited in their geographical coverage and by their resolving capability, which is determined by the array aperture, configuration, and number of stations. We demonstrate these limitations on three large seismic arrays located in Japan, Europe, and California, and find that all give a unique but imperfect insight into the P wave sources acting in the North Pacific. We then combine the data from all three arrays into one beamforming image. The combined images bring together the views offered by each array, providing a concise, comprehensive, and more robust representation of multiple source locations. Next we weight each array for distance in order to optimize the result. Being able to resolve and accurately locate source regions is an important step in being able to use seismic records to monitor ocean wave activity and track storms in real time.

Text Ward-Neale_et_al-2018-Journal_of_Geophysical_Research__Solid_Earth - Version of Record
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Accepted/In Press date: 18 December 2017
e-pub ahead of print date: 22 January 2018

Identifiers

Local EPrints ID: 417531
URI: https://eprints.soton.ac.uk/id/eprint/417531
ISSN: 2169-9356
PURE UUID: 4bbffecf-07eb-4ddf-ad50-adf746928cfa

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Date deposited: 02 Feb 2018 17:30
Last modified: 22 Apr 2018 16:30

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Contributors

Author: Jennifer Neale
Author: Nicholas Harmon
Author: Meric Srokozs

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