Development of a Slow Earthquake Database

Kano, Masayuki; Aso, Naofumi; Matsuzawa, Takanori; Ide, Satoshi; Annoura, Satoshi; Arai, Ryuta; Baba, Satoru; Bostock, M. G.; Chao, Kevin; Heki, Kosuke; Itaba, Satoshi; Ito, Yoshihiro; Kamaya, Noriko; Maeda, Takuto; Maury, Julie; Nakamura, Mamoru; Nishimura, Takuya; Obana, Koichiro; Ohta, Kazuaki; Poiata, Natalia; Rousset, Baptiste; Sugioka, Hiroko; Takagi, Ryota; Takahashi, Tsutomu; Takeo, Akiko; Tu, Yoko; Uchida, Naoki; Yamashita, Yusuke; Obara, Kazushige

doi:10.1785/0220180021

Cited by 78 publications

(70 citation statements)

References 43 publications

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“…The coseismic slip data of the 2003 Tokachi-Oki earthquake by Yagi (2004) were derived from the Finite-Source Rupture Model Database (http://equake-rc.info/ SRCMOD/). The VLFE catalog detected by Matsuzawa et al (2015) was obtained from the Slow Earthquake Database (Kano et al, 2018; http:// www-solid.eps.s.u-tokyo.ac.jp/ sloweq/). We used generic mapping tools to prepare the figures (Wessel et al, 2013).…”

Section: Acknowledgmentsmentioning

confidence: 99%

Comprehensive Detection of Very Low Frequency Earthquakes Off the Hokkaido and Tohoku Pacific Coasts, Northeastern Japan

et al. 2020

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Section: Acknowledgmentsmentioning

confidence: 99%

Comprehensive Detection of Very Low Frequency Earthquakes Off the Hokkaido and Tohoku Pacific Coasts, Northeastern Japan

et al. 2020

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“…We used the JMA unified hypocenter catalog (https://www.data.jma.go.jp/svd/eqev/data/bulletin/hypo_e.html). The catalog of Nakano, Hori, et al () was downloaded from the Slow Earthquake Database website (Kano et al, ; http://www-solid.eps.s.u-tokyo.ac.jp/~sloweq/). Generic Mapping Tools (Wessel et al, ) and Seismic Analysis Code (Helffrich et al, ) were used to create figures and for signal processing, respectively.…”

Section: Acknowledgmentsmentioning

confidence: 99%

Migrations and Clusters of Shallow Very Low Frequency Earthquakes in the Regions Surrounding Shear Stress Accumulation Peaks Along the Nankai Trough

Takemura

Noda

Kubota

et al. 2019

Geophysical Research Letters

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The spatiotemporal characteristics of shallow slow earthquake activity are linked to the tectonic environments of shallow plate boundaries. In this work, the spatiotemporal variations of shallow very low frequency earthquake (SVLFE) activity along the Nankai Trough were investigated using a cross‐correlation analysis. The SVLFEs migrated or spread eastward along the strike direction of the trench during large SVLFE episodes. Migrations and clusters of SVLFEs suggest the occurrence of shallow slow slip events. The observed lateral variations in SVLFE activity patterns reflect the heterogeneous distributions of effective strengths at the shallow plate boundary along the Nankai Trough. Migrations and clusters of SVLFEs tended to be concentrated in the regions surrounding the stress accumulation peaks on the Philippine Sea Plate boundary. The stress accumulated in the transitional regions between high‐strength and low‐strength zones can be released by shallow slow earthquakes.

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“…The SVLFE catalog of Sugioka et al (2012) was downloaded from the website of Slow Earthquake Database (Kano et al, 2018; http://www-solid.eps. The SVLFE catalog of Sugioka et al (2012) was downloaded from the website of Slow Earthquake Database (Kano et al, 2018; http://www-solid.eps.…”

Section: Acknowledgmentsmentioning

confidence: 99%

“…We used F-net and DONET broadband velocity seismograms, which were available from NIED website (https:// hinetwww11.bosai.go.jp/auth/?LANG= en). The SVLFE catalog of Sugioka et al (2012) was downloaded from the website of Slow Earthquake Database (Kano et al, 2018; http://www-solid.eps. s.u-tokyo.ac.jp/~sloweq/).…”

Section: Acknowledgmentsmentioning

confidence: 99%

Centroid Moment Tensor Inversion of Shallow Very Low Frequency Earthquakes Off the Kii Peninsula, Japan, Using a Three‐Dimensional Velocity Structure Model

Takemura

Matsuzawa

Kimura

et al. 2018

Geophysical Research Letters

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We conducted centroid moment tensor inversions of shallow very low frequency earthquakes (SVLFEs) that occurred around off the southeast Kii Peninsula, Japan. A set of Green's functions was evaluated using numerical simulations of seismic wave propagation in a three‐dimensional velocity structure model, including the subducting Philippine Sea slab and the accretionary prism. We used observed seismograms for periods of 20–50 s at an onshore broadband network, which enable us to investigate the long‐term activity of SVLFEs. Estimated centroid locations and focal mechanisms of SVLFEs, including SVLFEs that occurred prior to the deployment of seafloor observations, were very similar to those estimated using seafloor records. Low‐angle thrust faulting mechanisms were concentrated around the accretionary prism toe. SVLFE activity in April 2016 was concentrated further west in an area of previous activity. Our results imply seismic slip around the very shallow part of the Philippine Sea plate boundary.

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Development of a Slow Earthquake Database

Cited by 78 publications

References 43 publications

Comprehensive Detection of Very Low Frequency Earthquakes Off the Hokkaido and Tohoku Pacific Coasts, Northeastern Japan

Comprehensive Detection of Very Low Frequency Earthquakes Off the Hokkaido and Tohoku Pacific Coasts, Northeastern Japan

Migrations and Clusters of Shallow Very Low Frequency Earthquakes in the Regions Surrounding Shear Stress Accumulation Peaks Along the Nankai Trough

Centroid Moment Tensor Inversion of Shallow Very Low Frequency Earthquakes Off the Kii Peninsula, Japan, Using a Three‐Dimensional Velocity Structure Model

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