Journal ArticleDOI
Do subducting seamounts generate or stop large earthquakes
Kelin Wang,Susan L. Bilek +1 more
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In this paper, the authors explain that the seismogenic behavior of these seamounts is controlled by the development and evolution of an adjacent fracture network during subduction and cannot be described using the frictional behavior of a single fault.Abstract:
Seamount subduction is a common process in subduction zone tectonics. Contradicting a widely held expectation that subducting seamounts generate large earthquakes, seamounts subduct largely aseismically, producing numerous small earthquakes. On rare occasions when they do produce relatively large events, the ruptures tend to be complex, suggesting multiple rupture patches or faults. We explain that the seismogenic behavior of these seamounts is controlled by the development and evolution of an adjacent fracture network during subduction and cannot be described using the frictional behavior of a single fault. The complex structure and heterogeneous stresses of this network provide a favorable condition for aseismic creep and small earthquakes but an unfavorable condition for the generation and propagation of large ruptures.read more
Citations
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Deformation cycles of subduction earthquakes in a viscoelastic Earth
TL;DR: Over the past two decades, space geodesy has revolutionized the authors' view of crustal deformation between consecutive earthquakes, leading to a unifying picture in which the deformation is controlled by both the short-term and long-term viscous behaviour of the mantle.
Journal ArticleDOI
Slow slip near the trench at the Hikurangi subduction zone, New Zealand.
Laura M. Wallace,Spahr C. Webb,Yoshihiro Ito,Kimihiro Mochizuki,Ryota Hino,Stuart Henrys,Susan Y. Schwartz,Anne F. Sheehan +7 more
TL;DR: Detailed seafloor deformation observations made during an offshore slow-slip event (SSE) in September and October 2014 are presented, using a network of absolute pressure gauges deployed at the Hikurangi subduction margin offshore New Zealand.
Journal ArticleDOI
Invited review paper: Fault creep caused by subduction of rough seafloor relief
Kelin Wang,Susan L. Bilek +1 more
Journal ArticleDOI
Interseismic coupling, segmentation and mechanical behavior of the central Chile subduction zone
TL;DR: In this paper, a simple elastic model based on the back-slip assumption was proposed to explain the observed surface deformation, with no need of a sliver in central Chile, identifying four segments characterized by higher coupling and separated by narrow areas of lower coupling.
Journal ArticleDOI
Simultaneous long‐term and short‐term slow slip events at the Hikurangi subduction margin, New Zealand: Implications for processes that control slow slip event occurrence, duration, and migration
TL;DR: In this paper, the authors document a sequence of simultaneous short-term and long-term slow slip events (SSEs) at the Hikurangi subduction zone during the 2010/2011 period.
References
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Book
Geodynamics applications of continuum physics to geological problems
TL;DR: A comprehensive and quantitative study of the fundamental aspects of plate tectonics is presented in this paper, with an introduction to heat flow, elasticity and flexure, fluid mechanics, faulting, gravity, and flow in porous media.
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An updated digital model of plate boundaries
TL;DR: In this paper, a global set of present plate boundaries on the Earth is presented in digital form, taking into account relative plate velocities from magnetic anomalies, moment tensor solutions, and geodesy.
Journal ArticleDOI
Laboratory-derived friction laws and their application to seismic faulting
TL;DR: In this article, a review of the relationship between friction and the properties of earthquake faults is presented, as well as an interpretation of the friction state variable, including its interpretation as a measure of average asperity contact time and porosity within granular fault gouge.
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Predicting the endpoints of earthquake ruptures.
TL;DR: It is shown that about two-thirds of the endpoints of strike-slip earthquake ruptures are associated with fault steps or the termini of active fault traces, and that there exists a limiting dimension of fault step above which earthquake rupture do not propagate and below which rupture propagation ceases only about 40 per cent of the time.
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Subduction erosion along the Middle America convergent margin
César R. Ranero,R. von Huene +1 more
TL;DR: From seismic images, erosion by seamount tunnelling and removal of large rock lenses of a distending upper plate are identified, indicating that erosion may extend along much of the Middle America convergent margin.