Effects of small asperities on migration of slow-earthquakes along trench direction of subduction plate boundary: Investigation through a 3D numerical simulation

Keisuke Ariyoshi; Takane Hori; Yoshiyuki Kaneda; Jean Paul Ampuero; Toru Matsuzawa; Ryota Hino; Akira Hasegawa

doi:10.1142/9789814355391_0005

Effects of small asperities on migration of slow-earthquakes along trench direction of subduction plate boundary: Investigation through a 3D numerical simulation

Keisuke Ariyoshi, Takane Hori, Yoshiyuki Kaneda, Jean Paul Ampuero, Toru Matsuzawa, Ryota Hino, Akira Hasegawa

SCI - Research Center for Prediction of Earthquakes and Volcanic Eruptions (RCPEVE)

Research output: Chapter in Book/Report/Conference proceeding › Chapter

Abstract

In many subduction zones in the world, low-frequency tremors and earthquakes have been recognized at a depth of about 30 km. They occur independently or migrate along the trench direction of the plate interface. We investigate behaviors of their patterns through numerical simulation, by varying frictional properties of the plate interface. Our simulation results indicate that a chain reaction of small asperities can reproduce the migration process in terms of the migration speedand the slip velocity, under the condition that characteristicslip distance is larger than 0.4 mm.

Original language	English
Title of host publication	Advances in Geosciences
Subtitle of host publication	Volume 26: Solid Earth (SE)
Publisher	World Scientific Publishing Co.
Pages	47-54
Number of pages	8
ISBN (Electronic)	9789814355391
ISBN (Print)	9814355380, 9789814355384
DOIs	https://doi.org/10.1142/9789814355391_0005
Publication status	Published - 2011 Jan 1

ASJC Scopus subject areas

Earth and Planetary Sciences(all)
Engineering(all)
Environmental Science(all)

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10.1142/9789814355391_0005

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Ariyoshi, K., Hori, T., Kaneda, Y., Ampuero, J. P., Matsuzawa, T., Hino, R., & Hasegawa, A. (2011). Effects of small asperities on migration of slow-earthquakes along trench direction of subduction plate boundary: Investigation through a 3D numerical simulation. In Advances in Geosciences: Volume 26: Solid Earth (SE) (pp. 47-54). World Scientific Publishing Co.. https://doi.org/10.1142/9789814355391_0005

Effects of small asperities on migration of slow-earthquakes along trench direction of subduction plate boundary: Investigation through a 3D numerical simulation. / Ariyoshi, Keisuke; Hori, Takane; Kaneda, Yoshiyuki et al.
Advances in Geosciences: Volume 26: Solid Earth (SE). World Scientific Publishing Co., 2011. p. 47-54.

Research output: Chapter in Book/Report/Conference proceeding › Chapter

Ariyoshi, K, Hori, T, Kaneda, Y, Ampuero, JP, Matsuzawa, T , Hino, R & Hasegawa, A 2011, Effects of small asperities on migration of slow-earthquakes along trench direction of subduction plate boundary: Investigation through a 3D numerical simulation. in Advances in Geosciences: Volume 26: Solid Earth (SE). World Scientific Publishing Co., pp. 47-54. https://doi.org/10.1142/9789814355391_0005

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AU - Hasegawa, Akira

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AB - In many subduction zones in the world, low-frequency tremors and earthquakes have been recognized at a depth of about 30 km. They occur independently or migrate along the trench direction of the plate interface. We investigate behaviors of their patterns through numerical simulation, by varying frictional properties of the plate interface. Our simulation results indicate that a chain reaction of small asperities can reproduce the migration process in terms of the migration speedand the slip velocity, under the condition that characteristicslip distance is larger than 0.4 mm.

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Effects of small asperities on migration of slow-earthquakes along trench direction of subduction plate boundary: Investigation through a 3D numerical simulation

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