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Model update may 2016; upper-mantle heterogeneity beneath North America from travel-time tomography with global and USArray data

Scott Burdick, Frank L. Vernon, Vladik Martynov, Jennifer Eakins, Trilby Cox, Jonathan Tytell, Taimi Mulder, Malcolm C. White, Luciana Astiz, Gary L. Pavlis and Robert D. van der Hilst
Model update may 2016; upper-mantle heterogeneity beneath North America from travel-time tomography with global and USArray data
Seismological Research Letters (March 2017) 88 (2A): 319-325

Abstract

P-wave travel-time residuals from USArray helped improve the scale and consistency with which the mantle beneath North America is resolved. Beginning in 2008, we published a series of P-wave velocity models based on a global ray theoretical inversion of USArray and global catalog data. Here, we present the final model update, MITP_USA_2016MAY, which includes the complete set of travel-time residuals from USArray Transportable Array (TA) in the contiguous United States. In this model, the area of high resolution extends to the eastern margin of the continent, allowing us to better estimate the location and extent of slow features in Central Virginia and New England. An increasing number of data from the TA in Alaska also allows us to recover the structure of subducting Pacific plate and Yakutat terrane. In addition to highlighting new features in the final model, we visualize and discuss the improvements to the model due to the addition of USArray data through time.


ISSN: 0895-0695
EISSN: 1938-2057
Serial Title: Seismological Research Letters
Serial Volume: 88
Serial Issue: 2A
Title: Model update may 2016; upper-mantle heterogeneity beneath North America from travel-time tomography with global and USArray data
Affiliation: University of Maryland at College Park, Department of Geology, College Park, MD, United States
Pages: 319-325
Published: 201703
Text Language: English
Publisher: Seismological Society of America, El Cerrito, CA, United States
References: 17
Accession Number: 2017-037458
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N30°00'00" - N30°00'00", W28°30'00" - W28°30'00"
N41°00'00" - N47°30'00", W73°30'00" - W67°00'00"
N36°34'60" - N39°28'00", W83°34'60" - W75°15'00"
N51°00'00" - N72°00'00", W130°00'00" - E173°00'00"
Secondary Affiliation: University of California at San Diego, USA, United StatesCanadian Hazards Information Service, CAN, CanadaUniversity of California at Los Angeles, USA, United StatesNational Science Foundation, USA, United StatesIndiana University, USA, United StatesMassachusetts Institute of Technology, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201721
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