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Member Since 2020
Hanaya Okuda
Researcher, JAMSTEC Japan Agency for Marine-Earth Science and Technology
AGU Research
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Role of folds developed near plate boundaries in subduction zones as inelastic deformation
SLOW-TO-FAST EARTHQUAKES FROM SHALLOW TO DEEP: MULTISCALE RHEOLOGY OF PLATE BOUNDARY FAULTS V POSTER
seismology | 12 december 2024
Makoto Otsubo, Hanaya Okuda, Ayumu Miyakawa, Takeh...
We discuss the relationship between deformation and slow earthquakes in the shallow part of the subduction zone from the structural geology perspectiv...
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Olivine microstructures and deformation mechanisms occurring at lithosphere-asthenosphere boundary: insights from petit-spot peridotite xenoliths along the Japan Trench
PHYSICAL PROPERTIES OF EARTH MATERIALS (PPEM): DEFORMATION, FLOW, AND FAILURE V POSTER
mineral and rock physics | 12 december 2024
Dyuti Prakash Sarkar, Hanaya Okuda, Yuto Sato, Niw...
Petit spots were first identified as small knolls (~1 km3 volume) occurring on the ocean floor of the Pacific Plate as a result of plate flexure along...
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Frictional evolution during multiple seismic-slip pulse experiments and its implications on earthquake energetics in gabbroic faults
SHALLOW FAULT ZONE DEFORMATION OVER THE EARTHQUAKE CYCLE: OBSERVATIONS, EXPERIMENTS, AND MODELS I POSTER
tectonophysics | 11 december 2024
Dyuti Prakash Sarkar, Takehiro Hirose, Wataru Tani...
Earthquake along faults is primarily attributed to shear rupture instabilities leading to damage in the fault core and surrounding damage zone. Such s...
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Slip-Weakening Behavior of Volcanic Glass-Smectite Mixture at Intermediate Velocity Conditions: Implication for Slow Earthquakes
SLOW-TO-FAST EARTHQUAKES FROM SHALLOW TO DEEP: OBSERVATIONS, EXPERIMENTS, AND NUMERICAL MODELING IV POSTER
tectonophysics | 13 december 2023
Hanaya Okuda, Takehiro Hirose, Asuka Yamaguchi
Volcanic glass is abundant in shallow subduction zones and it produces one of the weakest materials, smectite, through alteration processes. Despite v...
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Potential Role of Volcanic Glass‐Smectite Mixtures in Slow Earthquakes in Shallow Subduction Zones: Insights From Low‐ to High‐Velocity Friction Experiments
JOURNAL OF GEOPHYSICAL RESEARCH: SOLID EARTH
31 july 2023
Hanaya Okuda, Takehiro Hirose, Asuka Yamaguchi
Volcanic glass and its mixture with smectite are commonly observed in shallow parts of subduction zones. As volcanic glass layers often act as glid...
Hydrothermal Friction Experiments on Simulated Basaltic Fault Gouge and Implications for Megathrust Earthquakes
JOURNAL OF GEOPHYSICAL RESEARCH: SOLID EARTH
30 december 2022
Hanaya Okuda, Andre R. Niemeijer, Miki Takahashi, ...
Nucleation of earthquake slip at the plate boundary fault (décollement) in subduction zones has been widely linked to the frictional propertie...
Deformation Process and Mechanism of the Frontal Megathrust at the Nankai Subduction Zone
GEOCHEMISTRY, GEOPHYSICS, GEOSYSTEMS
20 april 2022
Gaku Kimura, Yohei Hamada, Suguru Yabe, Asuka Yama...
The frontal megathrust of the Nankai Trough subduction zone is recognized as a seismogenic fault based on a record of frictional heating, but the u...
Spatial Patterns in Frictional Behavior of Sediments Along the Kumano Transect in the Nankai Trough
JOURNAL OF GEOPHYSICAL RESEARCH: SOLID EARTH
17 november 2021
Hanaya Okuda, Matt Ikari, Alexander Rösner, Katja ...
Fault slip activity at subduction zones is governed by sediment frictional properties, which in turn are affected by diagenetic processes. To study...