Rayleigh wave group velocity distributions for East Asia using ambient seismic noise

Witek, M.; Lee, Suzan van der; Kang, Tae Cheon

doi:10.1002/2014gl062016

Cited by 13 publications

(14 citation statements)

References 30 publications

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“…The anomaly in the East China Sea basin extends to the Jeju and Goto Islands. The Ulleung basin shows a prominent low‐velocity anomaly similar to previous studies [ Witek et al ., ; Lee et al ., ].…”

Section: Resultsmentioning

confidence: 87%

“…Analyzing ambient noise dispersion data potentially increases resolution of the crust and shallow upper mantle due to their dominant energy at relatively shorter periods than those of earthquakegenerated surface wave data. Similar imaging approaches have been applied to this region [Zheng et al, 2011;Witek et al, 2014;Shen et al, 2016] due to the availability of dense seismic networks. However, an uneven spatial distribution of stations mainly situated on land often results in poor resolution and inability to scrutinize tectonically important structures, such as back-arc features and magma sources beneath IPV on islands.…”

Section: Introductionmentioning

confidence: 99%

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Intraplate volcanism controlled by back‐arc and continental structures in NE Asia inferred from transdimensional Bayesian ambient noise tomography

Kim

Tkalčić

Rhie

et al. 2016

Geophysical Research Letters

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Intraplate volcanism adjacent to active continental margins is not simply explained by plate tectonics or plume interaction. Recent volcanoes in northeast (NE) Asia, including NE China and the Korean Peninsula, are characterized by heterogeneous tectonic structures and geochemical compositions. Here we apply a transdimensional Bayesian tomography to estimate high‐resolution images of group and phase velocity variations (with periods between 8 and 70 s). The method provides robust estimations of velocity maps, and the reliability of results is tested through carefully designed synthetic recovery experiments. Our maps reveal two sublithospheric low‐velocity anomalies that connect back‐arc regions (in Japan and Ryukyu Trench) with current margins of continental lithosphere where the volcanoes are distributed. Combined with evidences from previous geochemical and geophysical studies, we argue that the volcanoes are related to the low‐velocity structures associated with back‐arc processes and preexisting continental lithosphere.

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Section: Resultsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Intraplate volcanism controlled by back‐arc and continental structures in NE Asia inferred from transdimensional Bayesian ambient noise tomography

Kim

Tkalčić

Rhie

et al. 2016

Geophysical Research Letters

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“…Previous studies of the ANT of east Asia have focused mostly on land. The studies that cover the study area or part of it include the whole China and neighboring regions (Zheng SH et al, 2008; Sun XL et al, 2010; Xu ZJ et al, 2013; Bao XW et al, 2015; Shen WS et al, 2016) and northeast Asia (Zheng Y et al, 2011; Witek et al, 2014), the Korean Peninsula (Kang TS and Shin JS, 2006; Cho et al, 2007), North China (Fang LH et al, 2009), South China (Zhou LQ et al, 2012), and the Taiwan Island (Huang TY et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Ambient noise surface wave tomography of marginal seas in east Asia

Wang

Song

Ren

2017

Earth and Planetary Physics

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We conducted ambient noise tomography in east Asia, including the Chinese coastal provinces, Korea Peninsular, Japan, Taiwan Island, and marginal seas in between. We retrieved Rayleigh Green's functions from inter‐station correlations of 12 months of continuous waveform data at 573 broadband stations in the region. We obtained group and phase velocity dispersion curves and dispersion maps for periods from 10 to 70 s and inverted for 3D Vs model of the crust and uppermost mantle. Moho and lithosphere thickness were derived from the 3D model. We observed three prominent low velocity zones in the upper mantle, two in the accretionary wedges above the Pacific and Philippine subduction slabs and one beneath the Changbai Mountain region. The crust and lithosphere are generally thin in the region. The velocity anomalies, crustal thickness, and lithosphere thickness all show a similar trend in NNE‐SSW direction. The lithosphere shows a striking “sausage”‐type structure with alternating thickness. The crust thickness and lithosphere thickness both decrease progressively from NW to SE direction, which coincides with the distribution of episodic magmatism in SE China. We propose that the subduction of paleo‐Pacific slab and its rollback were mainly responsible for the crustal and lithosphere extension and the mantle lithosphere removal in east Asia.

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“…New China Digital Seismograph Network and Northeast China Extended Seismic Array data are available through the facilities of the IRIS Data Management System (http://ds.iris.edu/ds/nodes/dmc/data). Dispersion curves and data for Korean stations are referenced from Witek et al () and are available at the Korea Meteorological Administration (http://www.kma.go.kr) and the Korea Institute of Geoscience and Mineral Resources (http://www.kigam.re.kr). M. Witek, S. Ning, and S. van der Lee also acknowledge National Science Foundation grant NSF‐EAR 0847951 for computational facilities, and we thank Sue Griesbach and Bob Langan for donating dedicated GPU workstations.…”

Section: Acknowledgmentsmentioning

confidence: 99%

S Velocity Model of East Asia From a Cluster Analysis of Localized Dispersion

et al. 2018

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We measured Rayleigh wave group velocity dispersion curves from station pair cross correlations of continuous broadband data from 1,082 seismic stations in regional networks across China, Korea, and Japan. The dispersion curves are localized in the period range 6–40 s to produce group velocity maps, which we then combine with group velocity data in the period range 50–133 s from the global dispersion model of Ma et al. (2014, https://doi.org/10.1093/gji/ggu246). Cluster analysis performed on the local dispersion curves reveals distinct tectonic regions and provides a new way of estimating the number of regions needed to describe a surface wave dispersion data set. We inverted the centroid dispersion curves corresponding to each cluster for a new set of reference models. We used a combination of teleseismic receiver functions and Moho depths from the LITHO1.0 model to create a 3‐D Moho depth reference model and then constructed a 3‐D S velocity model by jointly inverting group velocities with localized phase velocities in the period range 28.57–200 s, also from Ma et al. (2014, https://doi.org/10.1093/gji/ggu246). The cluster analysis and comparisons with other regional models provide evidence for a broad region of deformed lithosphere in East Asia. We image high velocities in the Yangtze and Ordos cratons and low velocities underneath the East Sea (Sea of Japan), and we find that a low‐velocity zone in the midcrust is appropriate for Tibet. The model we present is intended as an alternative reference model that fits a broader range of periods to be used for further studies of regional geophysical phenomena.

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Rayleigh wave group velocity distributions for East Asia using ambient seismic noise

Cited by 13 publications

References 30 publications

Intraplate volcanism controlled by back‐arc and continental structures in NE Asia inferred from transdimensional Bayesian ambient noise tomography

Intraplate volcanism controlled by back‐arc and continental structures in NE Asia inferred from transdimensional Bayesian ambient noise tomography

Ambient noise surface wave tomography of marginal seas in east Asia

S Velocity Model of East Asia From a Cluster Analysis of Localized Dispersion

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