Kimihiro Mochizuki
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View article: Spatiotemporal variation of aftershock activity in northern source region of the 2011 Tohoku-oki earthquake by long-term ocean bottom seismometers
Spatiotemporal variation of aftershock activity in northern source region of the 2011 Tohoku-oki earthquake by long-term ocean bottom seismometers Open
A huge plate boundary earthquake eventuated between the Pacific plate and the landward plate in 2011 and was named the 2011 off the Pacific coast of Tohoku earthquake. Following the mainshock, many aftershocks were generated. It is essenti…
View article: Nitrogen loss in a region with developed food industries: a new method of nitrogen flow and recyclability analysis focusing on distribution system
Nitrogen loss in a region with developed food industries: a new method of nitrogen flow and recyclability analysis focusing on distribution system Open
The present study investigates nitrogen (N) flows within the food system of Yamanashi Prefecture from 2000 to 2015, by longitudinally integrating Input–Output analyses with N flow models. By unveiling detailed N flows specifically in the f…
View article: Precise aftershock activity in the marine source region of the 2024 Noto-Hanto earthquake by rapid response observation using ocean bottom seismometers
Precise aftershock activity in the marine source region of the 2024 Noto-Hanto earthquake by rapid response observation using ocean bottom seismometers Open
The 2024 Noto-Hanto earthquake with a magnitude of 7.6 occurred in the Noto Peninsula on January 1, 2024. The mainshock had a reverse fault focal solution and direction of compression axis was the northwest–southeast. In the Noto Peninsula…
View article: Seismic activity around shallow plate boundary near westernmost Nankai Trough revealed by ocean bottom seismometer observation
Seismic activity around shallow plate boundary near westernmost Nankai Trough revealed by ocean bottom seismometer observation Open
The Nankai Trough region has a history of devastating earthquakes. The Hyuga-nada region is situated in the westernmost Nankai Trough and has not experienced an earthquake exceeding magnitude 8. It is expected that there is a difference in…
View article: Subsurface structures around the subducting seamount illuminated by local earthquakes at the off-Ibaraki region, southern Japan Trench
Subsurface structures around the subducting seamount illuminated by local earthquakes at the off-Ibaraki region, southern Japan Trench Open
The off-Ibaraki region is a convergent margin at which a seamount subducts in the southern Japan Trench. At this off-Ibaraki region, an Ocean Bottom Seismometer (OBS) experiment was conducted from before to after the 2011 Tohoku-oki earthq…
View article: Structural control on the shallow tremor distribution linked to seamount subduction: insights from high-resolution seismic imaging in Hyuga-nada
Structural control on the shallow tremor distribution linked to seamount subduction: insights from high-resolution seismic imaging in Hyuga-nada Open
Tectonic tremors occur around the subducting seamount of the Kyushu Palau Ridge (KPR) in Hyuga-nada, Japan. We investigate the relationship between tremor activity and structural and physical characteristics using high-resolution reflectio…
View article: Geometrical barrier determines the updip limit of slow earthquake slip
Geometrical barrier determines the updip limit of slow earthquake slip Open
Increased observations of shallow slow earthquakes have highlighted structural irregularities that explain the generation mechanisms of slow earthquakes. However, due to considerable uncertainties in the source locations of slow earthquake…
View article: Thick slab crust with rough basement weakens interplate coupling in the western Nankai Trough
Thick slab crust with rough basement weakens interplate coupling in the western Nankai Trough Open
The westernmost Nankai Trough, southwest Japan, exhibits a rapid along-strike reduction in plate coupling in the proximity to the subducting Kyushu-Palau ridge. Yet how and to what extent the ridge subduction impacts physical properties at…
View article: Spatiotemporal Evolution of Slow Slip Events at the Offshore Hikurangi Subduction Zone in 2019 using GNSS, InSAR, and seafloor geodetic data
Spatiotemporal Evolution of Slow Slip Events at the Offshore Hikurangi Subduction Zone in 2019 using GNSS, InSAR, and seafloor geodetic data Open
Detecting crustal deformation during transient deformation events at offshore subduction zones remains challenging. The spatiotemporal evolution of slow slip events (SSEs) on the offshore Hikurangi subduction zone, New Zealand, during Febr…
View article: Subsurface Structures Around the Subducting Seamount Illuminated by Local Earthquakes at the Off-Ibaraki Region, Southern Japan Trench
Subsurface Structures Around the Subducting Seamount Illuminated by Local Earthquakes at the Off-Ibaraki Region, Southern Japan Trench Open
The off-Ibaraki region is a convergent margin at which a seamount subducts. An intensive event location was performed around the subducting seamount to reveal the regional seismotectonics of this region. By applying a migration-based event…
View article: Upper-plate conduits linked to plate boundary that hosts slow earthquakes
Upper-plate conduits linked to plate boundary that hosts slow earthquakes Open
In shallow subduction zones, fluid behavior impacts various geodynamic processes capable of regulating slip behaviors and forming mud volcanoes. However, evidence of structures that control the fluid transfer within an overriding plate is …
View article: Time-deterministic cryo-optical microscopy
Time-deterministic cryo-optical microscopy Open
We developed a technique to rapidly freeze biological systems during observation under an optical microscope, which allows for detailed optical observation at a precise time in the biological dynamics at high spatial resolution and quantif…
View article: Earthquake Magnitude With DAS: A Transferable Data‐Based Scaling Relation
Earthquake Magnitude With DAS: A Transferable Data‐Based Scaling Relation Open
Distributed Acoustic Sensing (DAS) is a promising technique to improve the rapid detection and characterization of earthquakes. Previous DAS studies mainly focus on the phase information but less on the amplitude information. In this study…
View article: 3D Active-Source Tomography Reveals Crustal Structure of the Central NE Japan Subduction Zone
3D Active-Source Tomography Reveals Crustal Structure of the Central NE Japan Subduction Zone Open
View article: Earthquake magnitude with DAS: a transferable data-based scaling relation
Earthquake magnitude with DAS: a transferable data-based scaling relation Open
Distributed Acoustic Sensing (DAS) is a promising technique to improve the rapid detection and characterization of earthquakes. Due to some instrumental limitations, current DAS studies primarily focus on the phase information but less on …
View article: Correction: CMT inversion for small-to-moderate earthquakes applying to dense short-period OBS array at off Ibaraki region
Correction: CMT inversion for small-to-moderate earthquakes applying to dense short-period OBS array at off Ibaraki region Open
View article: CMT inversion for small-to-moderate earthquakes applying to dense short-period OBS array at off Ibaraki region
CMT inversion for small-to-moderate earthquakes applying to dense short-period OBS array at off Ibaraki region Open
View article: CMT catalog of small-to-moderate earthquakes at off Ibaraki region
CMT catalog of small-to-moderate earthquakes at off Ibaraki region Open
CMT catalog of small-to-moderate earthquakes at off Ibaraki region The CMT solutions are obtained in “CMT inversion for small-to-moderate earthquakes applying to dense short-period OBS array at off Ibaraki region” by Lina Yamaya, Kimihiro …
View article: CMT catalog of small-to-moderate earthquakes at off Ibaraki region
CMT catalog of small-to-moderate earthquakes at off Ibaraki region Open
CMT catalog of small-to-moderate earthquakes at off Ibaraki region The CMT solutions are obtained in “CMT inversion for small-to-moderate earthquakes applying to dense short-period OBS array at off Ibaraki region” by Lina Yamaya, Kimihiro …
View article: Performance of Seismic Observation by Distributed Acoustic Sensing Technology Using a Seafloor Cable Off Sanriku, Japan
Performance of Seismic Observation by Distributed Acoustic Sensing Technology Using a Seafloor Cable Off Sanriku, Japan Open
Recently, the distributed acoustic sensing (DAS) measurement, which utilizes an optical fiber itself as a sensor, becomes popular for various fields and is being applied to seismic observations. The shortest spatial sampling of DAS observa…
View article: Seismic anisotropy structure of the northern Hikurangi margin, New Zealand, and its significance for subduction fault systems
Seismic anisotropy structure of the northern Hikurangi margin, New Zealand, and its significance for subduction fault systems Open
<p>The NZ3D OBS experiment performed in 2017-2018 in the northern Hikurangi margin off the east coast of North Island, New Zealand, provided the highest-resolution seismic refraction/wide‐angle reflection data with multi-az…
View article: Subsurface Structures Around the Subducting Seamount Illuminated by Local Earthquakes at the Off-Ibaraki Region, Southern Japan Trench
Subsurface Structures Around the Subducting Seamount Illuminated by Local Earthquakes at the Off-Ibaraki Region, Southern Japan Trench Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at Journal of Geophysical Research - Solid Earth. ESSOAr is a venue for early communication or feedback before peer review. Data may be pre…
View article: Temporal velocity variations in the northern Hikurangi margin and the relation to slow slip
Temporal velocity variations in the northern Hikurangi margin and the relation to slow slip Open
Slow slip events (SSE) have been studied in increasing detail over the last 20 years, improving our understanding of subduction zone processes. Although the relationship between SSEs and the physical properties of their surrounding materia…
View article: Temporal velocity variations in the northern Hikurangi margin and the relation to slow slip
Temporal velocity variations in the northern Hikurangi margin and the relation to slow slip Open
Slow slip events (SSE) have been studied in increasing detail over the last 20 years, improving our understanding of subduction zone processes. Although the relationship between SSEs and the physical properties of their surrounding materia…
View article: CMT inversion for small-to-moderate earthquakes applying to dense short-period OBS array at off Ibaraki region
CMT inversion for small-to-moderate earthquakes applying to dense short-period OBS array at off Ibaraki region Open
We conducted centroid moment tensor (CMT) inversion for small-to-moderate aftershocks in the off Ibaraki region of the 2011 off the Pacific coast of Tohoku earthquake. In this study, we used high-frequency (0.4–1.0 Hz) seismograms from a d…
View article: CMT catalog of small-to-moderate earthquakes at off Ibaraki region
CMT catalog of small-to-moderate earthquakes at off Ibaraki region Open
CMT catalog of small-to-moderate earthquakes at off Ibaraki region The CMT solutions are obtained in “CMT inversion for small-to-moderate earthquakes applying to dense short-period OBS array at off Ibaraki region” by Lina Yamaya, Kimihiro …
View article: Precise aftershock distribution of the 2019 Yamagata-oki earthquake using newly developed simple anchored-buoy ocean bottom seismometers and land seismic stations
Precise aftershock distribution of the 2019 Yamagata-oki earthquake using newly developed simple anchored-buoy ocean bottom seismometers and land seismic stations Open
An earthquake with a magnitude of 6.7 occurred in the Japan Sea off Yamagata on June 18, 2019. The mainshock had a source mechanism of reverse-fault type with a compression axis of WNW–ESE direction. Since the source area is positioned in …
View article: Continuous Tremor Activity With Stable Polarization Direction Following the 2014 Large Slow Slip Event in the Hikurangi Subduction Margin Offshore New Zealand
Continuous Tremor Activity With Stable Polarization Direction Following the 2014 Large Slow Slip Event in the Hikurangi Subduction Margin Offshore New Zealand Open
Many types of slow earthquakes have been discovered at subduction zones around the world. However, the physical process of these slow earthquakes is not well understood. To monitor offshore slow earthquakes, a marine seismic and geodetic e…
View article: Lithosphere–asthenosphere boundary beneath the Sea of Japan from transdimensional inversion of S-receiver functions
Lithosphere–asthenosphere boundary beneath the Sea of Japan from transdimensional inversion of S-receiver functions Open
The evolution history of the Sea of Japan back-arc basin remains under debate, involving the opening of sub-basins such as the Japan and Yamato Basins. Detailed knowledge of the lithospheric structure will provide the key to understanding …
View article: Sedimentary Structure Derived From Multi‐Mode Ambient Noise Tomography With Dense OBS Network at the Japan Trench
Sedimentary Structure Derived From Multi‐Mode Ambient Noise Tomography With Dense OBS Network at the Japan Trench Open
We derive the 3‐D S‐wave velocity structures of sediments and upper crust in the region off Ibaraki at Japan Trench subduction zone by applying ambient noise tomography to a dense array of short‐period ocean bottom seismometers (OBSs). The…