Slip Distribution and Seismic Moment of the 2010 and 1960 Chilean Earthquakes Inferred from Tsunami Waveforms and Coastal Geodetic Data
Yushiro Fujii,Kenji Satake +1 more
Reads0
Chats0
TLDR
The slip distribution and seismic moment of the 2010 and 1960 Chilean earthquakes were estimated from tsunami and coastal geodetic data as mentioned in this paper, and the total fault length is approximately 400 km with seismic moment 1.7 × 1022 Nm (Mw 8.8).Abstract:
The slip distribution and seismic moment of the 2010 and 1960 Chilean earthquakes were estimated from tsunami and coastal geodetic data. These two earthquakes generated transoceanic tsunamis, and the waveforms were recorded around the Pacific Ocean. In addition, coseismic coastal uplift and subsidence were measured around the source areas. For the 27 February 2010 Maule earthquake, inversion of the tsunami waveforms recorded at nearby coastal tide gauge and Deep Ocean Assessment and Reporting of Tsunamis (DART) stations combined with coastal geodetic data suggest two asperities: a northern one beneath the coast of Constitucion and a southern one around the Arauco Peninsula. The total fault length is approximately 400 km with seismic moment of 1.7 × 1022 Nm (Mw 8.8). The offshore DART tsunami waveforms require fault slips beneath the coasts, but the exact locations are better estimated by coastal geodetic data. The 22 May 1960 earthquake produced very large, ~30 m, slip off Valdivia. Joint inversion of tsunami waveforms, at tide gauge stations in South America, with coastal geodetic and leveling data shows total fault length of ~800 km and seismic moment of 7.2 × 1022 Nm (Mw 9.2). The seismic moment estimated from tsunami or joint inversion is similar to previous estimates from geodetic data, but much smaller than the results from seismic data analysis.read more
Citations
More filters
Journal ArticleDOI
Probabilistic Tsunami Hazard Analysis: Multiple Sources and Global Applications
Anita Grezio,Andrey Babeyko,Maria Ana Baptista,Jörn Behrens,Antonio Costa,Gareth E. Davies,Eric L. Geist,Sylfest Glimsdal,F. I. Gonzalez,Jonathan Griffin,Carl B. Harbitz,Randall J. LeVeque,Stefano Lorito,Finn Løvholt,Rachid Omira,Christof Mueller,Raphaël Paris,Tom Parsons,Jascha Polet,William Power,Jacopo Selva,Mathilde B. Sørensen,Hong Kie Thio +22 more
TL;DR: Probabilistic Tsunami Analyses (PTHAs) are conducted in different areas of the world at global, regional, and local scales with the aim of understanding tsunami hazard to inform tsunami risk reduction activities.
Journal ArticleDOI
Historical and recent large megathrust earthquakes in Chile
Sergio Ruiz,Raul Madariaga +1 more
TL;DR: In this paper, a reinterpretation of historical earthquakes shows a large diversity of earthquakes types; there is a major difference between giant earthquakes that break the entire plate interface and those of Mw ~ 8.0 that only break a portion of it.
Journal ArticleDOI
Traveltime delay and initial phase reversal of distant tsunamis coupled with the self‐gravitating elastic Earth
TL;DR: In this article, a new method to simulate tsunami waveforms on real ocean bathymetry that takes into account seawater compressibility, the elasticity of the Earth, and geopotential perturbations has been developed by applying a phase correction to the simulated long waves.
Journal ArticleDOI
Direct energy estimation of the 2011 Japan tsunami using deep‐ocean pressure measurements
Liujuan Tang,Liujuan Tang,Vasily V. Titov,Eddie N. Bernard,Yong Wei,Yong Wei,Christopher D. Chamberlin,Christopher D. Chamberlin,Jean C. Newman,Jean C. Newman,Harold O. Mofjeld,Diego Arcas,Diego Arcas,Marie C. Eble,C. W. Moore,Burak Uslu,Burak Uslu,Clint Pells,Clint Pells,Michael C. Spillane,Michael C. Spillane,Lindsey Wright,Lindsey Wright,Edison Gica,Edison Gica +24 more
TL;DR: In this article, the authors developed a method to compute the total energy transmitted by tsunami waves, to the case where the earthquake source is unknown, by using deep-ocean pressure measurements and numerical models (tsunami source functions).
Journal ArticleDOI
Source model of the 16 September 2015 Illapel, Chile, M w 8.4 earthquake based on teleseismic and tsunami data
TL;DR: Wessel and Smith as discussed by the authors used the GMT software for drawing the figures and benefited from constructive review comments by Costas E. Synolakis (University of Southern California, USA) and Yuichiro Tanioka (Hokkaido University, Japan).
References
More filters
Book
Solving least squares problems
TL;DR: Since the lm function provides a lot of features it is rather complicated so it is going to instead use the function lsfit as a model, which computes only the coefficient estimates and the residuals.
Journal ArticleDOI
New, improved version of generic mapping tools released
Paul Wessel,Walter H. F. Smith +1 more
TL;DR: GMT allows users to manipulate (x,y,z) data, and generate PostScript illustrations, including simple x-y diagrams, contour maps, color images, and artificially illuminated, perspective, and/or shaded-relief plots using a variety of map projections.
Journal ArticleDOI
Surface deformation due to shear and tensile faults in a half-space
TL;DR: In this paper, a suite of closed analytical expressions for the surface displacements, strains, and tilts due to inclined shear and tensile faults in a half-space for both point and finite rectangular sources are presented.
Journal ArticleDOI
Solving Least Squares Problems
Related Papers (5)
Field Survey of the 27 February 2010 Chile Tsunami
Hermann M. Fritz,Catherine M. Petroff,Patricio A. Catalán,Rodrigo Cienfuegos,Patricio Winckler,Nikos Kalligeris,Robert Weiss,Sergio Barrientos,Gianina Meneses,Carolina Valderas-Bermejo,C. W. Ebeling,Athanassios Papadopoulos,Manuel Contreras,Rafael Almar,Juan Carlos Dominguez,Costas E. Synolakis +15 more