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Your search keyword '"Sarah E. Minson"' showing total 3 results
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3 results on '"Sarah E. Minson"'

1. The Iquique earthquake sequence of April 2014: Bayesian modeling accounting for prediction uncertainty

Author

Mark Simons, Sarah E. Minson, Junle Jiang, Susan Owen, Luis Rivera, Jean-Paul Ampuero, Romain Jolivet, F. H. Ortega Culaciati, Angelyn Moore, Bryan Riel, Sergey Samsonov, Zacharie Duputel, Sismologie (IPGS) (IPGS-Sismologie), Institut de physique du globe de Strasbourg (IPGS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Division of Geological and Planetary Sciences [Pasadena], California Institute of Technology (CALTECH), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL), Département des Géosciences - ENS Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Canada Centre for Mapping and Earth Observation, Natural Resources Canada (CCMEO), Departamento de Geofísica [Santiago], Universidad de Chile, and United States Geological Survey [Reston] (USGS)

Subjects
Seismic gap, 010504 meteorology & atmospheric sciences, Slow slip, [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], Slip (materials science), Bayesian inversion, 010502 geochemistry & geophysics, 01 natural sciences, Earthquake simulation, Prediction uncertainty, 1877 Chile seismic gap, Aftershock, 0105 earth and related environmental sciences, [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics, Subduction, 2014 Iquique earthquake, Geodesy, Foreshock, Geophysics, 13. Climate action, Trench, General Earth and Planetary Sciences, Episodic tremor and slip, Kinematic source model, Geology, Seismology
Abstract

International audience; The subduction zone in northern Chile is a well-identified seismic gap that last ruptured in 1877. On April 1, 2014, this region was struck by a large earthquake following a two-week-long series of foreshocks. This study combines a wide range of observations, including geodetic, tsunami and seismic data, to produce a reliable kinematic slip model of the Mw = 8.1 mainshock and a static slip model of the Mw= 7.7 aftershock. We use a novel Bayesian modeling approach that accounts for uncertainty in the Green's functions, both static and dynamic, while avoiding non-physical regularization. The results reveal a sharp slip zone, more compact than previously thought, located downdip of the foreshock sequence and up-dip of high-frequency sources inferred by back-projection analysis. Both the mainshock and the Mw = 7.7 aftershock did not rupture to the trench and left most of the seismic gap unbroken, leaving the possibility of a future large earthquake in the region.

Published
2015

2. Bayesian inversion for finite fault earthquake source models - II: the 2011 great Tohoku-oki, Japan earthquake

Author

Junle Jiang, Mark Simons, Asaf Inbal, Sarah E. Minson, Susan Owen, F. Ortega, Anthony Sladen, Angelyn Moore, James L. Beck, Seismological Laboratory, California Institute of Technology (CALTECH), Division of Geological and Planetary Sciences [Pasadena], Division of Engineering and Applied Science, Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Géoazur (GEOAZUR 7329), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA), California Institute of Technology (CALTECH)-NASA, and Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])

Subjects
business.industry, Physics::Instrumentation and Detectors, Monte Carlo method, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Kinematics, Slip (materials science), Computer Science::Computational Geometry, Geodesy, Seafloor spreading, Physics::Geophysics, Geophysics, Geochemistry and Petrology, Trench, Global Positioning System, Probability distribution, A priori and a posteriori, business, Geology, Seismology
Abstract

We present a fully Bayesian inversion of kinematic rupture parameters for the 2011 M_w 9 Tohoku-oki, Japan earthquake. Albeit computationally expensive, this approach to kinematic source modelling has the advantage of producing an ensemble of slip models that are consistent with physical a priori constraints, realistic data uncertainties, and realistic but simplistic uncertainties in the physics of the kinematic forward model, all without being biased by non-physical regularization constraints. Combining 1 Hz kinematic GPS, static GPS offsets, seafloor geodesy and near-field and far-field tsunami data into a massively parallel Monte Carlo simulation, we construct an ensemble of samples of the posterior probability density function describing the evolution of fault rupture. We find that most of the slip is concentrated in a depth range of 10–20 km from the trench, and that slip decreases towards the trench with significant displacements at the toe of wedge occurring in just a small region. Estimates of static stress drop and rupture velocity are ambiguous. Due to the spatial compactness of the fault rupture, the duration of the entire rupture was less than approximately 150 s.

Published
2014

3. The 2011 Magnitude 9.0 Tohoku-Oki Earthquake: Mosaicking the Megathrust from Seconds to Centuries

Author

Hiroo Kanamori, Angelyn Moore, Eric A. Hetland, F. Ortega, Frank Webb, Susan Owen, Sarah E. Minson, Donald V. Helmberger, Jean-Paul Ampuero, Risheng Chu, Mark Simons, Shengji Wei, Anthony Sladen, Junle Jiang, Lingsen Meng, Seismological Laboratory, California Institute of Technology (CALTECH), Géoazur (GEOAZUR 6526), Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Jet Propulsion Laboratory (JPL), California Institute of Technology (CALTECH)-NASA, Department of Geological Sciences, University of Michigan [Ann Arbor], University of Michigan System-University of Michigan System, Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), and NASA-California Institute of Technology (CALTECH)

Subjects
Peak ground acceleration, Multidisciplinary, Seismic microzonation, 010504 meteorology & atmospheric sciences, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Moment magnitude scale, Slip (materials science), 010502 geochemistry & geophysics, 01 natural sciences, Interplate earthquake, Slow earthquake, Intraplate earthquake, Episodic tremor and slip, Seismology, Geology, 0105 earth and related environmental sciences
Abstract

Geophysical observations from the 2011 moment magnitude (M_w) 9.0 Tohoku-Oki, Japan earthquake allow exploration of a rare large event along a subduction megathrust. Models for this event indicate that the distribution of coseismic fault slip exceeded 50 meters in places. Sources of high-frequency seismic waves delineate the edges of the deepest portions of coseismic slip and do not simply correlate with the locations of peak slip. Relative to the M_w 8.8 2010 Maule, Chile earthquake, the Tohoku-Oki earthquake was deficient in high-frequency seismic radiation-a difference that we attribute to its relatively shallow depth. Estimates of total fault slip and surface secular strain accumulation on millennial time scales suggest the need to consider the potential for a future large earthquake just south of this event.

Published
2011

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