Seismic techniques using earthquakes are powerful tools for exploring the Earth's internal
structure. However, the earthquake distribution limits the spatial resolution. In recent years …

Surface wave tomography using dispersion data to obtain isotropic and anisotropic shear
wave velocity structures is a very efficient approach to study regional and global tectonics …

Seismic interferometry is becoming increasingly popular in urban areas due to its ability to
retrieve high-frequency surface waves from abundant anthropogenic seismic noise, hence …

The direct surface wave tomography has become an efficient tool in imaging 3-D shallow
Earth structure. However, some fundamental problems still exist in selecting the grids to …

We theoretically and empirically demonstrate the usability of the zero-crossing method for
quick microtremor surveys in earthquake engineering (ie microtremor array surveys), namely …

To reveal potential geothermal fluid flows and reservoir structures beneath the Kuju Volcano
group (southwest Japan) in high resolution, we analyzed 1 month of data from 29 …

Research interest in the Kinki region, southwestern Japan, has been aroused by the
frequent occurrence of microearthquake activity that do not always coincide with …

To monitor the volcanoes at a high spatiotemporal resolution, we introduce the singular
value decomposition‐based Wiener filter and the three‐component waveforms in ambient …

We present a crustal shear wave (S-wave) velocity model for central Japan that accurately
captures the previously mapped geology and lithology of the region. We perform a full …

To automate time-consuming and experience-based analysis of elastic wave velocities in
rock samples, we propose a method of determining the arrival time of experimental …