Finite frequency whole mantle P wave tomography: Improvement of subducted slab images

Masayuki Obayashi; Junko Yoshimitsu; Guust Nolet; Yoshio Fukao; Hajime Shiobara; Hiroko Sugioka; Hiroki Miyamachi; Yuan Gao

doi:10.1002/2013gl057401

journal article Nov 13, 2013

Finite frequency whole mantle P wave tomography: Improvement of subducted slab images

Masayuki Obayashi Junko Yoshimitsu Guust Nolet Yoshio Fukao Hajime Shiobara Hiroko Sugioka Hiroki Miyamachi Yuan Gao

Geophysical Research Letters Vol. 40 No. 21 pp. 5652-5657 · American Geophysical Union (AGU)

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Abstract

AbstractWe present a new whole mantle P wave tomographic model GAP_P4. We used two data groups; short‐period data of more than 10 million picked‐up onset times and long‐period data of more than 20 thousand differential travel times measured by waveform cross correlation. Finite frequency kernels were calculated at the corresponding frequency bands for both long‐ and short‐period data. With respect to an earlier model GAP_P2, we find important improvements especially in the transition zone and uppermost lower mantle beneath the South China Sea and the southern Philippine Sea owing to broadband ocean bottom seismometers (BBOBSs) deployed in the western Pacific Ocean where station coverage is poor. This new model is different from a model in which the full data set is interpreted with classical ray theory. BBOBS observations should be more useful to sharpen images of subducted slabs than expected from simple raypath coverage arguments.

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Metrics

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Citations

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References

Details

Published: Nov 13, 2013
Vol/Issue: 40(21)
Pages: 5652-5657
License: View

Authors

M

Masayuki Obayashi

Institute for Research on Earth Evolution Japan Agency for Marine‐Earth Science and Technology Kanagawa Japan

J

Junko Yoshimitsu

Institute for Research on Earth Evolution Japan Agency for Marine‐Earth Science and Technology Kanagawa Japan

G

Guust Nolet

Geosciences Azur Sophia Antipolis France

Y

Yoshio Fukao

Institute for Research on Earth Evolution Japan Agency for Marine‐Earth Science and Technology Kanagawa Japan

H

Hajime Shiobara

Earthquake Research Institute University of Tokyo Tokyo Japan

H

Hiroko Sugioka

Institute for Research on Earth Evolution Japan Agency for Marine‐Earth Science and Technology Kanagawa Japan

H

Hiroki Miyamachi

Graduate School of Science and Engineering Kagoshima University Kagoshima Japan

Y

Yuan Gao

Institute of Earthquake Science China Earthquake Administration Beijing China

Funding

Japanese grants-in-aid for Science Research Award: 16075208

JSPS Excellent Young Researchers Overseas Visit Program and ERC Advanced Award: 226837

Cite This Article

Masayuki Obayashi, Junko Yoshimitsu, Guust Nolet, et al. (2013). Finite frequency whole mantle P wave tomography: Improvement of subducted slab images. Geophysical Research Letters, 40(21), 5652-5657. https://doi.org/10.1002/2013gl057401

Finite frequency whole mantle P wave tomography: Improvement of subducted slab images

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