A methodology for inversion of broadband seismic waveforms for elastic and anelastic structure and its application to the mantle transition zone beneath the Northwestern Pacific - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Physics of the Earth and Planetary Interiors Année : 2010

A methodology for inversion of broadband seismic waveforms for elastic and anelastic structure and its application to the mantle transition zone beneath the Northwestern Pacific

Nobuaki Fuji
Robert J. Geller
  • Fonction : Auteur

Résumé

We develop a quantitative and objective methodology for inversion of body-wave waveform data for elastic and anelastic structure and apply it to the upper mantle and mantle transition zone (MTZ) beneath the Northwestern Pacific, using PREM as the starting model. We use the singular value decomposition (SVD) as the basis for our inversion and use Akaike's Information Criterion (AIC) to evaluate the statistical significance of the models. Although the resulting models are preliminary, we obtain an average positive S-wave velocity anomaly in the MTZ beneath the Philippine Sea Plate and the Japan Sea. We also find a negative S-wave velocity anomaly in the depth range 300-400 km beneath the subduction zone to the east of northern Japan and its southern extension beneath the Izu-Bonin-Marianas arc. Our inversions obtained a lower Qμ, as compared to PREM, for all of the subregions.
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Dates et versions

insu-03605318 , version 1 (11-03-2022)

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Nobuaki Fuji, Kenji Kawai, Robert J. Geller. A methodology for inversion of broadband seismic waveforms for elastic and anelastic structure and its application to the mantle transition zone beneath the Northwestern Pacific. Physics of the Earth and Planetary Interiors, 2010, 180, pp.118-137. ⟨10.1016/j.pepi.2009.10.004⟩. ⟨insu-03605318⟩
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