[HTML][HTML] Pore pressure distribution of a mega-splay fault system in the Nankai Trough subduction zone: Insight into up-dip extent of the seismogenic zone

T Tsuji, R Kamei, RG Pratt - Earth and Planetary Science Letters, 2014 - Elsevier
We use the pore pressure distribution predicted from a waveform tomography (WT) velocity
model to interpret the evolution of the mega-splay fault system in the Nankai Trough off …

Amplitude-variation-with-offset inversion using P-to S-wave velocity ratio and P-wave velocity

F Chen, Z Zong, Y Yang, X Gu - Geophysics, 2022 - library.seg.org
The estimation of P-to S-wave velocity ratio (PSR) in the subsurface has many applications
in gas-bearing reservoir prospecting, lithology discrimination, and anomalous pore-pressure …

On acoustic waveform tomography of wide-angle OBS data—strategies for pre-conditioning and inversion

R Kamei, RG Pratt, T Tsuji - Geophysical Journal International, 2013 - academic.oup.com
We successfully apply the acoustic Laplace–Fourier waveform tomography method to
delineate P-wave velocity structures of the mega-splay fault system in the central part of the …

Distribution of stress state in the Nankai subduction zone, southwest Japan and a comparison with Japan Trench

W Lin, TB Byrne, M Kinoshita, LC McNeill, C Chang… - Tectonophysics, 2016 - Elsevier
To better understand the distribution of three dimensional stress states in the Nankai
subduction zone, southwest Japan, we review various stress-related investigations carried …

Slow and delayed deformation and uplift of the outermost subduction prism following ETS and seismogenic slip events beneath Nicoya Peninsula, Costa Rica

EE Davis, H Villinger, T Sun - Earth and Planetary Science Letters, 2015 - Elsevier
Abstract Two ODP CORK (Ocean Drilling Program circulation obviation retrofit kit) borehole
hydrologic observatory sites deployed in 2002 at the toe of the subduction prism off Nicoya …

Overpressured underthrust sediment in the Nankai Trough forearc inferred from transdimensional inversion of high‐frequency teleseismic waveforms

T Akuhara, T Tsuji, T Tonegawa - Geophysical Research …, 2020 - Wiley Online Library
Active‐source seismic surveys have resolved the fine‐scale P‐wave velocity (Vp) of the
subsurface structure in subduction forearcs. In contrast, the S‐wave velocity (Vs) structure is …

Continuous monitoring system for safe managements of CO2 storage and geothermal reservoirs

T Tsuji, T Ikeda, R Matsuura, K Mukumoto… - Scientific reports, 2021 - nature.com
We have developed a new continuous monitoring system based on small seismic sources
and distributed acoustic sensing (DAS). The source system generates continuous …

Temporal change in seismic velocity associated with an offshore MW 5.9 Off-Mie earthquake in the Nankai subduction zone from ambient noise cross-correlation

T Ikeda, T Tsuji - Progress in Earth and Planetary Science, 2018 - Springer
The Nankai subduction zone off the Kii Peninsula, Japan, has a large potential to generate
megathrust earthquakes in the near future. To investigate the temporal variation of stress or …

Strike-slip motion of a mega-splay fault system in the Nankai oblique subduction zone

T Tsuji, J Ashi, Y Ikeda - Earth, Planets and Space, 2014 - Springer
We evaluated the influence of the trench-parallel component of plate motion on the active
fault system within the Nankai accretionary wedge from reflection seismic profiles, high …

The earth's surface controls the depth‐dependent seismic radiation of megathrust earthquakes

J Yin, MA Denolle - AGU Advances, 2021 - Wiley Online Library
Megathrust earthquakes exhibit a ubiquitous seismic radiation style: low‐frequency (LF)
seismic energy is efficiently emitted from the shallowest portion of the fault, whereas high …