Local earthquake (LE) tomography with joint inversion for P- and S-wave velocities using structural constraints

Détails

ID Serval
serval:BIB_8A403664D719
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Local earthquake (LE) tomography with joint inversion for P- and S-wave velocities using structural constraints
Périodique
Geophysical research letters
Auteur(s)
Tryggvason A., Linde N.
ISSN-L
0094-8276
Statut éditorial
Publié
Date de publication
2006
Volume
33
Pages
L07303
Langue
anglais
Notes
ISI:000236878100003
Résumé
In local earthquake ( LE) tomography for P- and S-wave velocities ( or
Vp/Vs ratios), constraints punishing deviations from a given Vp/Vs ratio
are often used. In a synthetic model test we demonstrate that though
such constraints inhibit unreasonable Vp/Vs ratio variations, they bias
the resulting Vp/Vs ratios. As an alternative approach, structural
constraints based on the cross-product of the model gradients can be
used to constrain the joint P- and S-wave inversion. We show that the
resulting models are as low in artifacts as if a Vp/Vs damping was used,
but the resulting Vp/Vs ratios are less biased, which is important for a
quantitative interpretation of physical properties and processes in the
Earth.
Création de la notice
30/03/2012 13:24
Dernière modification de la notice
03/03/2018 19:09
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