M. Nishino

Research Field

A micro tsunami from an interplate earthquake ( M w 6.1) was observed in 1998 on ocean bottom tsunami meters (OBTMs) deployed east off the northeastern Japan. The offshore tsunami data without complex distortions due to the coastal topography enable us to estimate reliable tsunami source parameters. The observed amplitude was about 1.5 cm at epicentral distance less than 100 km. We numerically computed the tsunami waveform by solving the linear Boussinesq equations. The observed tsunami waveforms are well explained by synthetic waveforms assuming the fault width of 10–15 km. The depth of the fault is estimated as 5–10 km below the seafloor, which is in good agreement with the location of the plate boundary defined by previous seismic studies.

Tsunami earthquake

Seafloor Spreading

Tsunami wave

10.1029/2001gl013297

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Citations (56)

Microseismicity in the inter-seismic period in the rupture area of the 1994 Sanriku-Oki Earthquake by ocean bottom seismographic observation

AGUFM (2001)

A. Kuwano Shinji Yoneshima Ryota Hino M. Nishino Hajime Shiobara

Ocean bottom

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Citations (0)

3D P-wave velocity structure around the rupture area of the 2003 Tokachi-oki earthquake (Mw=8.0) in the margin of the Kuril trench

AGU Fall Meeting Abstracts (2006)

Yuya Machida Tetsuo Takanami Yoshio Murai Masanao Shinohara Takashi Yamada

Margin (machine learning)

Seismic velocity

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A Study of Shear-Wave Velocity Structure Over the Seismic-Aseismic Boundary Along the Japan-Trench Subduction Zone -Preliminary Results-

AGUFM (2002)

Kimihiro Mochizuki Junzo Kasahara Miyuki Nakamura Ryota Hino M. Nishino

Source

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Ocean bottom pressure observation off Sanriku and comparison with ocean tide models, altimetry, and barotropic signals from ocean models

Geophysical Research Letters (2006)

Koji Matsumoto Tadahiro Sato Hiromi Fujimoto Yoshiaki Tamura M. Nishino

We discuss tidal and non‐tidal signals which are obtained from ocean bottom pressure (OBP) measurements at two sites off Sanriku, Japan. Comparison between the observed tidal component and five ocean tide models shows that recent models have accuracy better than 1.3 cm in terms of root sum square of vector differences for eight principal constituents. The empirical estimates of non‐tidal signal from TOPEX/POSEIDON (T/P) and JASON‐1 deviate from barotropic signals observed by OBP recorders, which can be attributed to baroclinic component in the altimeter data. We also compared the non‐tidal barotropic signal derived from the observation with those from ECCO model (wind‐driven) and Kyushu University model (pressure‐driven). The comparison indicates that the pressure‐driven model increases explained variance and it is suggested to combine the wind‐driven model and the pressure‐driven model in order to describe non‐tidal ocean mass variability in particular at period shorter than 30 days.

Barotropic fluid

Ocean tide

Internal tide

Tidal Model

10.1029/2006gl026706

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Citations (12)

Microseismicity in the rupture area of the 1994 Sanriku-Oki Earthquake determined by long-term ocean bottom seismographic observation

AGU Fall Meeting Abstracts (2003)

A. Kuwano Ryota Hino M. Nishino Toshinori Sato Hajime Shiobara

Ocean bottom

Source