Multiscale seismic imaging of the eastern Nankai trough by full waveform inversion

Details Multiscale seismic imaging of the eastern Nankai trough by full waveform inversion Multiscale seismic imaging of the eastern Nankai trough by full waveform inversion

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3118606d&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 18, CiteID L18606

Statistics

Computation

17

Exploration Geophysics: Computational Methods, Seismic, Marine Geology And Geophysics: Marine Seismics (0935), Structural Geology: Fractures And Faults, Tectonophysics: Continental Margins And Sedimentary Basins

Scientific paper

Classical active seismic methods fail to sharply image the earth's deep crust. We present the first crustal-scale application of 2-D full waveform inversion based on dense ocean bottom seismic data to investigate the Eastern Nankai subduction system (Japan). This approach allows to quantify seismic velocities up to an unprecedented degree of resolution. Results reveal compressive tectonic features within both the subducting oceanic crust and the backstop. At depth, velocity anomalies along major faults and structural discontinuities bring evidence for the presence of fluids and weakened material and also for a possible co-seismic slip partitioning structure.

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