JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126(4) 2021年4月
The Atotsugawa fault is one of the most active faults in Japan, and the strain accumulation at the fault is considered to be caused by an aseismic shear zone in the fluid-rich lower crust. To identify the shear zone and investigate the origin of t...
Shinya Sato   Tada-Nori Goto   Takafumi Kasaya   Hiroshi Ichihara   
GEOPHYSICS 86(1) E21-E35 2021年1月
The magnetotelluric (MT) method has been used for visualizing subsurface resistivity structures and more recently for monitoring resistivity changes. However, electromagnetic data often include cultural noise, which can cause errors in the estimat...
Ping-Yu Chang   Tada-nori Goto   Xiangyun Hu   Evan Um   
TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES 31(5) 487-495 2020年10月
Electromagnetic (EM) exploration techniques, as powerful and important geophysical tools, have been extensively used in researches ranging from tectonics and resource exploration to environmental and engineering studies. These tools have also prov...
Shinya Sato   Tada-nori Goto   Katsuaki Koike   
EARTH PLANETS AND SPACE 72(1) 2020年7月
Spatial gradients in the primary geomagnetic fields directly contribute to both the amplitudes and phases of inter-station transfer functions (IS-TFs). This suggests that, for the analysis of subsurface resistivity structures, IS-TFs should be car...
GEOPHYSICAL RESEARCH LETTERS 46(20) 11025-11034 2019年10月
Although seafloor massive sulfide (SMS) deposits are crucially important metal resources that contain high-grade metals such as copper, lead, and zinc, their internal structures and generation mechanisms remain unclear. This study obtained detaile...