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Dive into the research topics where D. C. Boyarko is active.

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Featured researches published by D. C. Boyarko.


Journal of Geophysical Research | 2010

Slab morphology in the Cascadia fore arc and its relation to episodic tremor and slip

Pascal Audet; Michael G. Bostock; D. C. Boyarko; Michael R. Brudzinski; Richard M. Allen

[1] Episodic tremor and slip (ETS) events in subduction zones occur in the general vicinity of the plate boundary, downdip of the locked zone. In developing an understanding of the ETS phenomenon it is important to relate the spatial occurrence of nonvolcanic tremor to the principal structural elements within the subduction complex. In Cascadia, active and passive source seismic data image a highly reflective, dipping, low‐velocity zone (LVZ) beneath the fore‐arc crust; however, its continuity along the margin is not established with certainty, and its interpretation is debated. In this work we have assembled a large teleseismic body wave data set comprising stations from northern California to northern Vancouver Island. Using stacked receiver functions we demonstrate that the LVZ is well developed along the entire margin from the coast eastward to the fore‐arc basins (Georgia Strait, Puget Sound, and Willamette Valley). Combined with observations and predictions of intraslab seismicity, seismic velocity structure, and tremor hypocenters, our results support the thesis that the LVZ represents the signature of subducted oceanic crust, consistent with thermal‐petrological modeling of subduction zone metamorphism. The location of tremor epicenters along the revised slab contours indicates their occurrence close to but seaward of the wedge corner. Based on evidence for high pore fluid pressure within the oceanic crust and a downdip transition in permeability of the plate interface, we propose a conceptual model for the generation of ETS where the occurrence and recurrence of propagating slow slip and low‐frequency tremor are explained by episodic pore fluid pressure buildup and fluid release into or across the plate boundary.


Journal of Geophysical Research | 2010

Spatial and temporal patterns of nonvolcanic tremor along the southern Cascadia subduction zone

D. C. Boyarko; Michael R. Brudzinski


Earth and Planetary Science Letters | 2011

Investigation of Cascadia segmentation with ambient noise tomography

Robert W. Porritt; Richard M. Allen; D. C. Boyarko; Michael R. Brudzinski


Earth and Planetary Science Letters | 2010

Seismic anisotropy beneath Cascadia and the Mendocino triple junction: Interaction of the subducting slab with mantle flow

Caroline M. Eakin; Mathias Obrebski; Richard M. Allen; D. C. Boyarko; Michael R. Brudzinski; Robert W. Porritt


Earth and Planetary Science Letters | 2015

Automated detection and location of tectonic tremor along the entire Cascadia margin from 2005 to 2011

D. C. Boyarko; Michael R. Brudzinski; Robert W. Porritt; Richard M. Allen; Anne M. Trehu


Archive | 2010

Slow slip along the Cascadia margin: Offset updip from tremor, more heterogeneous along strike than tremor, and caused by a separate peak in inter-ETS plate coupling

S. G. Holtkamp; Michael Robert Brudzinski; D. C. Boyarko


Archive | 2009

Segmentation of the Cascades Volcanic Arc Revealed Through Ambient Noise Based Surface Wave Tomography

Robert W. Porritt; Richard M. Allen; Morgan Paul Moschetti; F.-L. Lin; Michael H. Ritzwoller; Nikolai M. Shapiro; Michael R. Brudzinski; D. C. Boyarko; L. J. O'Driscoll; Glyn W. Humphreys; Yu Jia Zhai; Alan R. Levander


Archive | 2007

Spatial and Temporal Patterns of Non-Volcanic Tremor Source Locations All Along the Cascadia Subduction Zone

D. C. Boyarko; Michael Robert Brudzinski


Archive | 2010

Empirical relationships among slow earthquake source parameters from tremor and slip across Cascadia

D. C. Boyarko; Michael Robert Brudzinski


Archive | 2010

Imaging Lithospheric Cascadia Structure with Ambient Noise Tomography

Robert W. Porritt; Richard M. Allen; Michael R. Brudzinski; D. C. Boyarko; L. J. O'Driscoll; Yu Jia Zhai; Alan R. Levander; E. D. Humphreys; Fred F. Pollitz

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Robert W. Porritt

University of Southern California

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Michael H. Ritzwoller

University of Colorado Boulder

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Morgan Paul Moschetti

University of Colorado Boulder

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Michael G. Bostock

University of British Columbia

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