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Symptomatic Features of Intraplate Earthquakes

2003; Seismological Society of America; Volume: 74; Issue: 6 Linguagem: Inglês

10.1785/gssrl.74.6.863

1938-2057

Abhijit Gangopadhyay, Pradeep Talwani,

Earthquake Detection and Analysis

Other| November 01, 2003 Symptomatic Features of Intraplate Earthquakes Abhijit Gangopadhyay; Abhijit Gangopadhyay Department of Geological Sciences University of South Carolina Columbia, SC 29208 abhijit@seis.sc.edu talwani@geol.sc.edu Search for other works by this author on: GSW Google Scholar Pradeep Talwani Pradeep Talwani Department of Geological Sciences University of South Carolina Columbia, SC 29208 abhijit@seis.sc.edu talwani@geol.sc.edu Search for other works by this author on: GSW Google Scholar Author and Article Information Abhijit Gangopadhyay Department of Geological Sciences University of South Carolina Columbia, SC 29208 abhijit@seis.sc.edu talwani@geol.sc.edu Pradeep Talwani Department of Geological Sciences University of South Carolina Columbia, SC 29208 abhijit@seis.sc.edu talwani@geol.sc.edu Publisher: Seismological Society of America First Online: 09 Mar 2017 Online ISSN: 1938-2057 Print ISSN: 0895-0695 © 2003 by the Seismological Society of America Seismological Research Letters (2003) 74 (6): 863–883. https://doi.org/10.1785/gssrl.74.6.863 Article history First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Abhijit Gangopadhyay, Pradeep Talwani; Symptomatic Features of Intraplate Earthquakes. Seismological Research Letters 2003;; 74 (6): 863–883. doi: https://doi.org/10.1785/gssrl.74.6.863 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietySeismological Research Letters Search Advanced Search Abstract Available geological, geophysical, and seismological data for 39 cases were compared and analyzed to understand the cause of intraplate earthquakes. The results revealed common features which can be used to test models for their seismogenesis. Intraplate seismicity occurs in the vicinity of "stress concentrators" within pre-existing zones of weakness, most commonly failed rifts. These stress concentrators are structures where plate tectonic stresses can cause a localized build-up of stresses and, ultimately, earthquakes. These include intersecting faults, buried plutons, and rift pillows. One of the intersecting faults was often found to be tens of kilometers in length and oriented optimally with respect to the maximum horizontal stress direction. Intraplate earthquakes have longer return periods compared to their plate-boundary counterparts. They occur in failed rifts of all ages, whereas those not associated with rifts occur only in the Precambrian crust. The former have shorter return periods (≤500 years) compared to the latter (thousands of years). You do not have access to this content, please speak to your institutional administrator if you feel you should have access.