Skip to Main content Skip to Navigation
Journal articles

Time-reversal imaging of seismic sources and application to the great Sumatra earthquake

Abstract : The increasing power of computers and numerical methods (like spectral element methods) allows continuously improving modelization of the propagation of seismic waves in heterogeneous media and the development of new applications in particular time reversal in the three-dimensional Earth. The concept of time-reversal (hereafter referred to as TR) was previously successfully applied for acoustic waves in many fields like medical imaging, underwater acoustics and non destructive testing. We present here the first application at the global scale of TR with associated reverse movies of seismic waves propagation by sending back long period time-reversed seismograms. We show that seismic wave energy is refocused at the right location and the right time of the earthquake. When TR is applied to the Sumatra-Andaman earthquake (26 Dec. 2004), the migration of the rupture from the south towards the north is retrieved. Therefore, TR is potentially interesting for constraining the spatio-temporal history of complex earthquakes.
Document type :
Journal articles
Complete list of metadatas

Cited literature [23 references]  Display  Hide  Download

https://hal-insu.archives-ouvertes.fr/insu-01390090
Contributor : Eva Fareau <>
Submitted on : Monday, October 31, 2016 - 3:56:38 PM
Last modification on : Saturday, September 26, 2020 - 11:44:08 PM

File

Larmat_et_al-2006-Geophysical_...
Publisher files allowed on an open archive

Identifiers

Citation

Carene Larmat, Jean-Paul Montagner, Mathias Fink, Yann Capdeville, Arnaud Tourin, et al.. Time-reversal imaging of seismic sources and application to the great Sumatra earthquake. Geophysical Research Letters, American Geophysical Union, 2006, 33 (19), pp.L19312. ⟨10.1029/2006GL026336⟩. ⟨insu-01390090⟩

Share

Metrics

Record views

942

Files downloads

844