TOMO3D: 3-D joint refraction and reflection traveltime tomography
parallel code for active-source seismic data-synthetic test

Meléndez, Adrià; Korenaga, Jun; Sallarès, Valentí; Miniussi, A.; Ranero, César R.; Ministerio de Ciencia e Innovación (España)

$TOMO3D: 3-D joint refraction and reflection traveltime tomography parallel code for active-source seismic data-synthetic test$

TOMO3D: 3-D joint refraction and reflection traveltime tomography parallel code for active-source seismic data-synthetic test

17 pages, 11 figures, 1 table, supporting Information http://gji.oxfordjournals.org/content/203/1/158/suppl/DC1

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Bibliographic Details
Main Authors:	Meléndez, Adrià, Korenaga, Jun, Sallarès, Valentí, Miniussi, A., Ranero, César R.
Other Authors:	Ministerio de Ciencia e Innovación (España)
Format:	artículo biblioteca
Published:	Oxford University Press
Subjects:	Inverse theory, Controlled source seismology, Seismic tomography,
Online Access:	http://hdl.handle.net/10261/124227 http://dx.doi.org/10.13039/501100004837
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id	dig-icm-es-10261-124227
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spelling	dig-icm-es-10261-1242272019-09-26T11:11:54Z TOMO3D: 3-D joint refraction and reflection traveltime tomography parallel code for active-source seismic data-synthetic test Meléndez, Adrià Korenaga, Jun Sallarès, Valentí Miniussi, A. Ranero, César R. Ministerio de Ciencia e Innovación (España) Repsol Inverse theory Controlled source seismology Seismic tomography 17 pages, 11 figures, 1 table, supporting Information http://gji.oxfordjournals.org/content/203/1/158/suppl/DC1 Published by Oxford University Press on behalf of The Royal Astronomical Society. We present a new 3-D traveltime tomography code (TOMO3D) for the modelling of active-source seismic data that uses the arrival times of both refracted and reflected seismic phases to derive the velocity distribution and the geometry of reflecting boundaries in the subsurface. This code is based on its popular 2-D version TOMO2D from which it inherited the methods to solve the forward and inverse problems. The traveltime calculations are done using a hybrid ray-tracing technique combining the graph and bending methods. The LSQR algorithm is used to perform the iterative regularized inversion to improve the initial velocity and depth models. In order to cope with an increased computational demand due to the incorporation of the third dimension, the forward problem solver, which takes most of the run time (~90 per cent in the test presented here), has been parallelized with a combination of multi-processing and message passing interface standards. This parallelization distributes the ray-tracing and traveltime calculations among available computational resources. The code's performance is illustrated with a realistic synthetic example, including a checkerboard anomaly and two reflectors, which simulates the geometry of a subduction zone. The code is designed to invert for a single reflector at a time. A data-driven layer-stripping strategy is proposed for cases involving multiple reflectors, and it is tested for the successive inversion of the two reflectors. Layers are bound by consecutive reflectors, and an initial velocity model for each inversion step incorporates the results from previous steps. This strategy poses simpler inversion problems at each step, allowing the recovery of strong velocity discontinuities that would otherwise be smoothened. © The Authors 2015 AM is funded by Repsol through the CO-DOS collaboration project with CSIC, and the work in this paper was carried at the Grup de Recerca de la Generalitat de Catalunya 2009SGR146: Barcelona Center for Subsurface Imaging (B-CSI) of the Institut de Ciències del Mar (CSIC). Part of this work was also financed by the MICINN project POSEIDON (CMT2010-21569) Peer Reviewed 2015-10 2015-11-02T08:17:47Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1093/gji/ggv292 issn: 0956-540X e-issn: 1365-246X Geophysical Journal International 203(1): 158-174 (2015) http://hdl.handle.net/10261/124227 10.1093/gji/ggv292 http://dx.doi.org/10.13039/501100004837 Publisher's version http://dx.doi.org/10.1093/gji/ggv292 No open Oxford University Press
institution	ICM ES
collection	DSpace
country	España
countrycode	ES
component	Bibliográfico
access	En linea
databasecode	dig-icm-es
tag	biblioteca
region	Europa del Sur
libraryname	Biblioteca del ICM España
topic	Inverse theory Controlled source seismology Seismic tomography Inverse theory Controlled source seismology Seismic tomography
spellingShingle	Inverse theory Controlled source seismology Seismic tomography Inverse theory Controlled source seismology Seismic tomography Meléndez, Adrià Korenaga, Jun Sallarès, Valentí Miniussi, A. Ranero, César R. TOMO3D: 3-D joint refraction and reflection traveltime tomography parallel code for active-source seismic data-synthetic test
description	17 pages, 11 figures, 1 table, supporting Information http://gji.oxfordjournals.org/content/203/1/158/suppl/DC1
author2	Ministerio de Ciencia e Innovación (España)
author_facet	Ministerio de Ciencia e Innovación (España) Meléndez, Adrià Korenaga, Jun Sallarès, Valentí Miniussi, A. Ranero, César R.
format	artículo
topic_facet	Inverse theory Controlled source seismology Seismic tomography
author	Meléndez, Adrià Korenaga, Jun Sallarès, Valentí Miniussi, A. Ranero, César R.
author_sort	Meléndez, Adrià
title	TOMO3D: 3-D joint refraction and reflection traveltime tomography parallel code for active-source seismic data-synthetic test
title_short	TOMO3D: 3-D joint refraction and reflection traveltime tomography parallel code for active-source seismic data-synthetic test
title_full	TOMO3D: 3-D joint refraction and reflection traveltime tomography parallel code for active-source seismic data-synthetic test
title_fullStr	TOMO3D: 3-D joint refraction and reflection traveltime tomography parallel code for active-source seismic data-synthetic test
title_full_unstemmed	TOMO3D: 3-D joint refraction and reflection traveltime tomography parallel code for active-source seismic data-synthetic test
title_sort	tomo3d: 3-d joint refraction and reflection traveltime tomography parallel code for active-source seismic data-synthetic test
publisher	Oxford University Press
url	http://hdl.handle.net/10261/124227 http://dx.doi.org/10.13039/501100004837
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TOMO3D: 3-D joint refraction and reflection traveltime tomography parallel code for active-source seismic data-synthetic test

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