@article{7c37a64b7c99472b8de95ddb6c263206,
title = "Receiver Function Imaging of the Amphibious NE Japan Subduction Zone—Effects of Low-Velocity Sediment Layer",
abstract = "This study presents reflectivity images of the northeast (NE) Japan subduction zone continuous across the ocean and land. As nearly half of its forearc region is under the ocean, data from ocean bottom seismometers (OBSs) must be utilized to fully image the region by passive seismic analysis. The use of OBS data has been a challenge due to inherent characters of the ocean bottom observations: high noise level and effects of seafloor sediment. Now, decent imaging is possible in NE Japan overcoming the high level noise due to the accumulated data set of the OBSs. The low-velocity of seafloor sediment significantly delays and amplifies S waves passing through them, and thus complicates teleseismic waveforms. We identify and correct these effects to produce coherent receiver function images throughout the amphibious subduction zone. Our images provide a potential for discussing new structural features and will help better understanding of the dynamics of the NE Japan subduction zone.",
keywords = "body waves, oceanic crust, subduction zone processes, subduction zones",
author = "Kim, {Hye Jeong} and Hitoshi Kawakatsu and Takeshi Akuhara and Masanao Shinohara and Hajime Shiobara and Hiroko Sugioka and Ryota Takagi",
note = "Funding Information: The authors acknowledge the National Research Institute for Earth Science and Disaster Resilience, Japan Meteorological Agency, Earthquake Research Institute (ERI) of the University of Tokyo, Hirosaki University, and Tohoku University for providing the data used in this study. The authors also acknowledge that some of the data are archived and provided by Earthquake Research Institute Joint Usage/Research Program under ERI JURP 2020-F3-12 and 2019-B-06. This study is partly supported by the KAKENHI Grant number 19K21892 from the Japan Society for the Promotion of Science (JSPS). H. Kim is supported by the KAKENHI Grant-in-Aid for JSPS Fellows (20J22082) from the JSPS. The authors use GMT (Wessel et al., 2013) to draw figures. We thank the associate editor and two anonymous reviewers for comments that improved the manuscript. Funding Information: The authors acknowledge the National Research Institute for Earth Science and Disaster Resilience, Japan Meteorological Agency, Earthquake Research Institute (ERI) of the University of Tokyo, Hirosaki University, and Tohoku University for providing the data used in this study. The authors also acknowledge that some of the data are archived and provided by Earthquake Research Institute Joint Usage/Research Program under ERI JURP 2020‐F3‐12 and 2019‐B‐06. This study is partly supported by the KAKENHI Grant number 19K21892 from the Japan Society for the Promotion of Science (JSPS). H. Kim is supported by the KAKENHI Grant‐in‐Aid for JSPS Fellows (20J22082) from the JSPS. The authors use GMT (Wessel et al., 2013 ) to draw figures. We thank the associate editor and two anonymous reviewers for comments that improved the manuscript. Publisher Copyright: {\textcopyright} 2021 The Authors.",
year = "2021",
month = sep,
doi = "10.1029/2021JB021918",
language = "English",
volume = "126",
journal = "Journal of Geophysical Research: Solid Earth",
issn = "2169-9313",
publisher = "American Geophysical Union",
number = "9",
}