Explanipedia

Tectonic tremor: The chatter of mafic underplating Open

Geena Littel, M. G. Bostock, C. G. Sammis, Simon M. Peacock, Andrew J. Calvert · 2025

Tremor is a weak seismic signal accompanying slow fault slip at plate boundaries. The relationship between tremor and slow slip and the tremor source mechanism have been widely debated, owing largely to the challenge of accurately locating…

Seismic imaging reveals a strain-partitioned sliver and nascent megathrust at an incipient subduction zone in the northeast Pacific Open

Collin C. Brandl, L. L. Worthington, E. C. Roland, M. A. L. Walton, M. R. Nedimović , et al. · 2025

The Queen Charlotte plate boundary (QCPB), a transform separating the Pacific and North American plates, accommodates ~55 millimeters per year of motion, is a source of large earthquakes in the northeast Pacific, and may be a modern site o…

Relative Moment Tensor Inversion for Microseismicity: Application to Clustered Earthquakes in the Cascadia Forearc Open

Doriane Drolet, M. G. Bostock, Simon M. Peacock · 2024

The relative abundance of small earthquakes affords significant opportunities for improved understanding of regional seismotectonics; however, determining moment tensors for such events recorded on regional networks is complicated by low s…

Serpentinization of the forearc mantle wedge in subduction zones: revisiting Roy D. Hyndman’s seminal contributions 25 years later Open

Simon M. Peacock, M. G. Bostock · 2024

In this paper, we focus on the serpentinization of the forearc mantle wedge, just one of Roy Hyndman’s many contributions to our understanding of subduction zones. Over the past 25 years, numerous advances in geophysics, petrology, and geo…

Incipient Subduction and Slip Partitioning at High Obliquity: The Haida Gwaii Plate Boundary Open

S. J. C. Oliva, M. G. Bostock, A. J. Schaeffer, Edwin Nissen, Reid Merrill , et al. · 2024

Plate motion obliquity along the dominantly transform Queen Charlotte plate boundary (QCPB) peaks offshore Haida Gwaii. To investigate the effects of obliquity on plate boundary deformation, we analyze continuous seismic waveforms from tem…

Thank You to Our 2023 Reviewers Open

Alexandre Schubnel, Rachel E. Abercrombie, Yves Bernabé, M. G. Bostock, Mark J. Dekkers , et al. · 2024

The entire editorial board of the Journal of Geophysical Research‐Solid Earth would like to sincerely thank all our colleagues who reviewed manuscripts for us in 2023. The hours they spent reading in order to provide insightful comments on…

Multi-parameter Receiver Function Modeling: Application to the Subduction Zones of Cascadia and the Central Andes Open

Wasja Bloch, Bernd Schurr, Claudio Faccenna, Frederik Tilmann, Pascal Audet , et al. · 2024

Receiver functions are a powerful tool to image lithospheric stratigraphy. For flat lying structures, receiver functions can be stacked azimuthally to achieve high signal-to-noise ratios and h-κ-stacks allow to estimate the depth of i…

Tectonic tremor: the chatter of mafic underplating beneath southern Vancouver Island? Open

Geena Littel, M. G. Bostock, C. G. Sammis, Simon M. Peacock, Andrew J. Calvert · 2024

Tremor is a low-amplitude seismic signal that usually temporally coincides with episodic slow fault slip at plate boundaries worldwide. Since the discovery of tremor in Cascadia, significant effort has been devoted to understanding its rel…

A Cascadia Slab Model From Receiver Functions Open

Wasja Bloch, M. G. Bostock, Pascal Audet · 2023

We map the characteristic signature of the subducting Juan de Fuca and Gorda plates along the entire Cascadia forearc from northern Vancouver Island, Canada, to Cape Mendocino in northern California, USA, using teleseismic receiver functio…

A complex Queen Charlotte Plate Boundary offshore Haida Gwaii Open

S. J. C. Oliva, M. G. Bostock, A. J. Schaeffer, Edwin Nissen, Reid Merrill , et al. · 2023

The Queen Charlotte plate boundary marks a transpressional system between the Pacific and North American plates, extending from offshore Haida Gwaii in Canada into southeastern Alaska. Using continuous seismic waveforms from temporary and …

Thank You to Our 2022 Peer Reviewers Open

Isabelle Manighetti, Rachel E. Abercrombie, Yves Bernabé, M. G. Bostock, Mark J. Dekkers , et al. · 2023

Editors of JGR‐Solid Earth express their appreciation to those who served as peer reviewers for the journal in 2022.

Microplate Evolution in the Queen Charlotte Triple Junction & Explorer Region: New Insights From Microseismicity Open

Geena Littel, M. G. Bostock, A. J. Schaeffer, S. W. Roecker · 2023

The Queen Charlotte triple junction/Explorer microplate region offshore British Columbia, Canada, is marked by poorly understood and rapidly evolving microplate tectonics. Although the region hosts abundant seismicity, it has received rela…

Bella Coola Seismicity Data Open

Geena Littel, M. G. Bostock · 2023

Microseismicity in the western Coast Mountains of British Columbia in the Bella Coola region. Includes initial and relocations of seismicity, P-wave velocity model and station location information, and focal mechanism solutions. These data…

Bella Coola Seismicity Data Open

Geena Littel, M. G. Bostock · 2023

Microseismicity in the western Coast Mountains of British Columbia in the Bella Coola region. Includes initial and relocations of seismicity, P-wave velocity model and station location information, and focal mechanism solutions. These data…

Thank You to Our 2021 Peer Reviewers Open

Isabelle Manighetti, Rachel E. Abercrombie, Yehuda Ben‐Zion, Yves Bernabé, M. G. Bostock , et al. · 2022

Editors of JGR‐Solid Earth express their appreciation to those who served as peer reviewers for the journal in 2021.

Complex Structure in the Nootka Fault Zone Revealed by Double‐Difference Tomography and a New Earthquake Catalog Open

Reid Merrill, M. G. Bostock, Simon M. Peacock, A. J. Schaeffer, S. W. Roecker · 2022

We employ an automatic earthquake detection algorithm to seismic waveforms recorded between the years 2000 and 2020 in southwest British Columbia. 32,121 events which possess at least three paired P ‐ and S ‐wave arrival times are located,…

Plain Language Summary Required for Submission to <i>Journal of Geophysical Research: Solid Earth</i> Open

Isabelle Manighetti, Rachel E. Abercrombie, Yehuda Ben‐Zion, Yves Bernabé, M. G. Bostock , et al. · 2021

The editors of JGR: Solid Earth announce that Plain Language Summaries will be required for all manuscripts.

Thank You to Our 2020 Peer Reviewers Open

Isabelle Manighetti, Rachel E. Abercrombie, Yehuda Ben‐Zion, Yves Bernabé, M. G. Bostock , et al. · 2021

Members of the editorial board of JGR‐Solid Earth express their appreciation to those who served as peer reviewers for the journal in 2020.

Cascadia low frequency earthquakes at the base of an overpressured subduction shear zone Open

Andrew J. Calvert, M. G. Bostock, Geneviève Savard, Martyn Unsworth · 2020

The northern terminus of Cascadia subduction - Supporting data Open

Geneviève Savard, M. G. Bostock, Jesse Hutchinson, Honn Kao, Nikolas I. Christensen , et al. · 2020

This repository contains the seismic tomography data for the nearshore inversion presented in the manuscript "The northern terminus of Cascadia subduction", submitted to the Journal of Geophysical Research: Solid Earth. Vp, Vs and Vp/Vs ve…

The northern terminus of Cascadia subduction - Supporting data Open

Geneviève Savard, M. G. Bostock, Jesse Hutchinson, Honn Kao, Nikolas I. Christensen , et al. · 2020

This repository contains the seismic tomography data for the nearshore inversion presented in the manuscript "The northern terminus of Cascadia subduction", submitted to the Journal of Geophysical Research: Solid Earth. Vp, Vs and Vp/Vs ve…

Telewavesim: Python software for teleseismic body wave modeling Open

Pascal Audet, C. J. Thomson, M. G. Bostock, Tom Eulenfeld · 2019

Relative moment tensors and deep Yakutat seismicity Open

A. P. Plourde, M. G. Bostock · 2019

SUMMARY We introduce a new relative moment tensor (MT) inversion method for clusters of nearby earthquakes. The method extends previous work by introducing constraints from S-waves that do not require modal decomposition and by employing p…

The teleseismic signature of fossil subduction Open

M. G. Bostock, Jean-Philippe Mercier, Pascal Audet, J. B. Gaherty, Edward J. Garnero , et al. · 2019

Beyond Receiver Functions: Green's Function Estimation by Transdimensional Inversion and Its Application to OBS Data Open

Takeshi Akuhara, M. G. Bostock, A. P. Plourde, Masanao Shinohara · 2019

Receiver functions, calculated by deconvolving P (or vertical) component records of teleseismic waveforms from the corresponding SV (or radial) components, have been widely used to obtain receiver‐side Green's functions in an approximate f…

Seismicity, Metamorphism, and Fluid Evolution Across the Northern Cascadia Fore Arc Open

Geneviève Savard, M. G. Bostock, Nikolas I. Christensen · 2018

We invert traveltime data from regular seismicity and low‐frequency earthquakes (LFEs) on southern Vancouver Island to map fore‐arc structure and seismogenesis. Tomographic images reveal high Poisson's ratios associated with a previously m…

Variations in slow slip moment rate associated with rapid tremor reversals in <span>C</span>ascadia Open

J. C. Hawthorne, M. G. Bostock, A. A. Royer, Amanda M. Thomas · 2016

During large slow slip events, tremor sometimes propagates in the reverse along‐strike direction for a few hours, at speeds 10 to 40 times faster than the forward propagation. We examine the aseismic slip that underlies this rapidly propag…

Fluid‐assisted deformation of the subduction interface: Coupled and decoupled regimes from 2‐D hydromechanical modeling Open

Liang Zheng, Dave A. May, Taras Gerya, M. G. Bostock · 2016

Shear deformation, accompanied with fluid activity inside the subduction interface, is related to many tectonic energy‐releasing events, including regular and slow earthquakes. We have numerically examined the fluid‐rock interactions insid…

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