Characterizing seismogenic fault structures in Oklahoma using a relocated template matched catalog

Seismological Research Letters
By: , and 

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Abstract

Oklahoma is one of the most seismically active places in the United States as a result of industry activities. In order to characterize the fault networks responsible for these earthquakes in Oklahoma, we relocated a large-scale template matching catalog between 2010-2016 using the GrowClust algorithm . This relocated catalog is currently the most complete statewide catalog for Oklahoma during this seven-year window. Using this relocated catalog, we identified seismogenic fault segments by developing an algorithm that clusters earthquakes and then identifies linear trends within each cluster. Considering the large number of earthquakes in Oklahoma, this algorithm made the process of identifying previously unmapped seismogenic faults more approachable and objective. We identify approximately 2500 seismogenic fault segments which are in general agreement with focal mechanisms and optimally oriented relative to maximum principle stress measurements. We demonstrate that these fault orientations can be used to approximate the maximum principle stress orientations.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Characterizing seismogenic fault structures in Oklahoma using a relocated template matched catalog
Series title Seismological Research Letters
DOI 10.1785/0220190045
Volume 90
Issue 4
Year Published 2019
Language English
Publisher Seismological Society of America
Contributing office(s) Earthquake Science Center
Description 9 p.
First page 1535
Last page 1543
Country United States
State Oklahoma