Journal ArticleDOI
Determination of the time-dependent moment tensor using time reverse imaging
Claudia Finger,Erik H. Saenger +1 more
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In this article, the authors developed an approach to determine the time-dependent moment tensor and the origin time in addition to commonly derived locations of seismic events using time reverse imaging (TRI).Abstract:
We have developed an approach to determine the time-dependent moment tensor and the origin time in addition to commonly derived locations of seismic events using time reverse imaging (TRI)....read more
Citations
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Journal ArticleDOI
Interpretation of time reversal focal spots based on point-source homogenization
TL;DR: In this paper , the authors discuss the link between the focal spot and the original source using the concept of homogenized point source and show that the backpropagated wavefield is equivalent to the sum of two low-wavenumber fields resulting from the homogenization of the original point source.
Journal ArticleDOI
Geophysics Bright Spots
TL;DR: A collection of Geophysics Bright Spots as mentioned in this paper is a collection of research that the editors found interesting in the latest issue of Geophysical Journal of Astronautic and Space Astronautics.
Journal ArticleDOI
Characterizing Microearthquakes Induced by Hydraulic Fracturing With Hybrid Borehole DAS and Three-Component Geophone Data
TL;DR: In this article , an elliptical vertical transverse isotropic (VTI) velocity model is derived from the Backus-averaged well-log sonic data and is modified to match the microseismic wavefronts by a grid search.
Journal ArticleDOI
The Weisweiler passive seismological network: optimised for state-of-the-art location and imaging methods
Claudia Finger,Marco P. Roth,Marco Dietl,Aileen Gotowik,Nina A. Engels,Rebecca M. Harrington,Brigitte Knapmeyer-Endrun,Klaus Reicherter,Thomas A. Oswald,Thomas Reinsch,Erik H. Saenger +10 more
TL;DR: Finger et al. as discussed by the authors report on a passive seismic dataset recorded with 48 seismic stations centred at and around Eschweiler-Weisweiler (https://doi.org/10.14470/MO7576467356, Finger et al., 2022).
References
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Book
Quantitative seismology : theory and methods
Keiiti Aki,Paul Richards +1 more
TL;DR: This work has here attempted to give a unified treatment of those methods of seismology that are currently used in interpreting actual data and develops the theory of seismic-wave propagation in realistic Earth models.
Journal ArticleDOI
An improved method for determining the regional stress tensor using earthquake focal mechanism data: Application to the San Fernando Earthquake Sequence
TL;DR: In this article, a grid search of stress models is performed to find the one which requires the smallest total rotation of all the fault planes that is needed to match the observed and predicted slip directions.
Book
Fundamentals of Geophysics
TL;DR: The most popular undergraduate textbook for geophysics is the Geophysics: A Coursebook for Undergraduates as mentioned in this paper, which contains twelve chapters covering the same breadth of topics as earlier editions, but in a substantially modernized fashion to facilitate classroom teaching.
Journal ArticleDOI
Modeling the propagation of elastic waves using a modified finite-difference grid
TL;DR: In this paper, a new rotated staggered grid where all medium parameters are defined at appropriate positions within an elementary cell for the essential operations is proposed to simulate the propagation of elastic waves in a medium containing cracks, pores or free surfaces.
Journal ArticleDOI
Time-reversed acoustics
Mathias Fink,Didier Cassereau,Arnaud Derode,Claire Prada,Philippe Roux,Mickael Tanter,Jean-Louis Thomas,F. Wu +7 more
TL;DR: In this paper, the authors show that time reversal invariance can be exploited in acoustics to create a variety of useful instruments as well as elegant experiments in pure physics, and they describe time reversal cavities and mirrors together with a comparison between time reversal and phase conjugation.