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A mechanical Model for Intraplate Earthquakes: Application to the New Madrid Seismic Zone

Kenner, Shelley J. and Segall, Paul (2000) A mechanical Model for Intraplate Earthquakes: Application to the New Madrid Seismic Zone. Science, 289 (5488). pp. 2329-2332. ISSN 0036-8075. https://resolver.caltech.edu/CaltechAUTHORS:20141113-074557616

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Abstract

We present a time-dependent model for the generation of repeated intraplate earthquakes that incorporates a weak lower crustal zone within an elastic lithosphere. Relaxation of this weak zone after tectonic perturbations transfers stress to the overlying crust, generating a sequence of earthquakes that continues until the zone fully relaxes. Simulations predict large (5 to 10 meters) slip events with recurrence intervals of 250 to 4000 years and cumulative offsets of about 100 meters, depending on material parameters and far-field stress magnitude. Most are consistent with earthquake magnitude, coseismic slip, recurrence intervals, cumulative offset, and surface deformation rates in the New Madrid Seismic Zone. Computed interseismic strain rates may not be detectable with available geodetic data, implying that low observed rates of strain accumulation cannot be used to rule out future damaging earthquakes.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1126/science.289.5488.2329DOIArticle
http://www.sciencemag.org/content/289/5488/2329PublisherArticle
Additional Information:© 2000 American Association for the Advancement of Science. 25 May 2000; accepted 20 July 2000. We thank M. H. Murray for help with the GPS uncertainty analysis and B. Grollimund and M. D. Zoback for their insights regarding the NMSZ and glacial triggering.
Issue or Number:5488
Record Number:CaltechAUTHORS:20141113-074557616
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20141113-074557616
Official Citation:A Mechanical Model for Intraplate Earthquakes: Application to the New Madrid Seismic Zone Shelley J. Kenner and and Paul Segall Science 29 September 2000: 289 (5488), 2329-2332. [DOI:10.1126/science.289.5488.2329]
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51694
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:13 Nov 2014 16:57
Last Modified:03 Oct 2019 07:35

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