The intensity signature of induced seismicity

Bulletin of the Seismological Society of America
By: , and 

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Abstract

We analyze a comprehensive database of 63,000 geocoded community intensity observations from >400 earthquakes of moment magnitude M3.5 in Oklahoma from 2010 to 2016 to define the intensity signature of induced events. We show that natural and induced events have similar average intensities within 10 km of the epicenter. At greater distances, induced events have low‐average intensities compared with deeper natural events. These trends are predictable based on ground‐motion prediction equations. They are a consequence of two focal‐depth effects that have offsetting impacts on the strength of ground motion: (1) the epicenter is near the source for shallow events, and (2) the stress parameter scales with focal depth.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title The intensity signature of induced seismicity
Series title Bulletin of the Seismological Society of America
DOI 10.1785/0120170316
Volume 103
Issue 3A
Year Published 2018
Language English
Publisher Seismological Society of America
Contributing office(s) Geologic Hazards Science Center
Description 7 p.
First page 1080
Last page 1086