A geodetic plate motion and Global Strain Rate Model
Reads0
Chats0
TLDR
The Global Strain Rate Model (GSRM v.2.1) as mentioned in this paper is a new global model of plate motions and strain rates in plate boundary zones constrained by horizontal geodetic velocities.Abstract:
We present a new global model of plate motions and strain rates in plate boundary zones constrained by horizontal geodetic velocities. This Global Strain Rate Model (GSRM v.2.1) is a vast improvement over its predecessor both in terms of amount of data input as in an increase in spatial model resolution by factor of ∼2.5 in areas with dense data coverage. We determined 6739 velocities from time series of (mostly) continuous GPS measurements; i.e., by far the largest global velocity solution to date. We transformed 15,772 velocities from 233 (mostly) published studies onto our core solution to obtain 22,511 velocities in the same reference frame. Care is taken to not use velocities from stations (or time periods) that are affected by transient phenomena; i.e., this data set consists of velocities best representing the interseismic plate velocity. About 14% of the Earth is allowed to deform in 145,086 deforming grid cells (0.25° longitude by 0.2° latitude in dimension). The remainder of the Earth's surface is modeled as rigid spherical caps representing 50 tectonic plates. For 36 plates we present new GPS-derived angular velocities. For all the plates that can be compared with the most recent geologic plate motion model, we find that the difference in angular velocity is significant. The rigid-body rotations are used as boundary conditions in the strain rate calculations. The strain rate field is modeled using the Haines and Holt method, which uses splines to obtain an self-consistent interpolated velocity gradient tensor field, from which strain rates, vorticity rates, and expected velocities are derived. We also present expected faulting orientations in areas with significant vorticity, and update the no-net rotation reference frame associated with our global velocity gradient field. Finally, we present a global map of recurrence times for Mw=7.5 characteristic earthquakes.read more
Citations
More filters
Journal ArticleDOI
Present‐Day Crustal Deformation of Continental China Derived From GPS and Its Tectonic Implications
TL;DR: In this paper, the authors process GPS data from continental China to derive site velocities and find that the deformation field inside the Tibetan plateau and Tien Shan is predominantly continuous and large deformation gradients only exist perpendicular to the Indo-Eurasian relative plate motion and are associated with a few large strike slip faults.
Journal ArticleDOI
GPlates: Building a Virtual Earth Through Deep Time
R. Dietmar Müller,John Cannon,Xiaodong Qin,Robin J. Watson,Michael Gurnis,Simon Williams,Tobias Pfaffelmoser,Maria Seton,Samuel H. J. Russell,Sabin Zahirovic +9 more
TL;DR: GPlates as mentioned in this paper is an open-source, cross-platform plate tectonic geographic information system, enabling the interactive manipulation of plate-tectonic reconstructions and the visualization of geodata through geological time.
Journal ArticleDOI
The World Stress Map database release 2016 : Crustal stress pattern across scales
Oliver Heidbach,Mojtaba Rajabi,Xiaofeng Cui,Karl Fuchs,Birgit Müller,John Reinecker,Karsten Reiter,Mark Tingay,Friedemann Wenzel,Furen Xie,Moritz Ziegler,Mary-Lou Zoback,Mark D. Zoback +12 more
TL;DR: In this article, the authors present details of the new WSM database release 2016 and an analysis of global and regional stress pattern, and show two examples of 40 degrees-60 degrees S-Hmax rotations within 70 km.
Journal ArticleDOI
A Global Plate Model Including Lithospheric Deformation Along Major Rifts and Orogens Since the Triassic
R. Dietmar Müller,Sabin Zahirovic,Simon Williams,John Cannon,Maria Seton,Dan J. Bower,Dan J. Bower,Michael G. Tetley,Christian Heine,Christian Heine,Eline Le Breton,Shaofeng Liu,Samuel H. J. Russell,Ting Yang,Ting Yang,Jonathon Leonard,Michael Gurnis +16 more
TL;DR: The authors presented a global Mesozoic-Cenozoic deforming plate motion model that captures the progressive extension of all continental margins since the initiation of rifting within Pangea at ~240 Ma.
Journal ArticleDOI
Crustal Deformation in the India‐Eurasia Collision Zone From 25 Years of GPS Measurements
Gang Zheng,Hua Wang,Hua Wang,Tim J. Wright,Yidong Lou,Rui Zhang,Weixing Zhang,Chuang Shi,Jinfang Huang,Na Wei +9 more
TL;DR: In this paper, the authors present the most complete, accurate, and up-to-date velocity field for India-Eurasia available, comprising 2576 velocities measured during 1991-2015.
References
More filters
Journal ArticleDOI
Present-day deformation along the El Pilar Fault in eastern Venezuela: Evidence of creep along a major transform boundary
François Jouanne,Franck Audemard,Christian Beck,Aurelien van Welden,Reinaldo Ollarves,Carlos Reinoza +5 more
TL;DR: The right-lateral strike-slip El Pilar Fault is one of the major structures that accommodate the relative displacement between the Caribbean and South-America Plates as discussed by the authors.
Journal ArticleDOI
Frequency and size of quaternary surface ruptures of the pitaycachi fault, northeastern Sonora, Mexico
TL;DR: In this paper, the authors used diffusion-equation analysis for reconstructed pre-1887 scarp profiles and showed that the prior event occurred more than 100,000 yr ago.
Journal ArticleDOI
How rigid is a rigid plate? Geodetic constraint from the TrigNet CGPS network, South Africa
TL;DR: Rocco Malservisi, Urs Hugentobler, Richard Wonnacott, and Matthias Hackl as discussed by the authors proposed a method to estimate the distance between two points.
Journal ArticleDOI
Upper mantle anisotropy beneath the Seychelles microcontinent
James Hammond,J-M Kendall,Georg Rümpker,James Wookey,Nicholas A Teanby,Nicholas A Teanby,P. Joseph,Trond Ryberg,Graham Stuart +8 more
TL;DR: In this article, the authors analyzed the upper mantle seismic anisotropy using SKS splitting results and showed that the splitting results cannot be explained by simple asthenospheric flow associated with absolute plate motions.