We investigate the three-dimensional Pand S-wave attenuation (Q P and Q S ) structures of the crust around the source region of the 2016 Kumamoto earthquakes, Japan. To estimate the attenuation structures, the path-averaged attenuation factor t∗ is estimated from the amplitude decay rate of the Pand S-wave spectra corrected for the source spectrum. The Q P and Q S structures are estimated by to...

To obtain an accurate one-dimensional velocity model, we developed the EA_VELEST method based on evolutionary algorithm and VELEST program. This can quickly generate a suitable 1D model finally input it into 3D inversion process using TomoDD method. We adopt methods to inverse high-resolution three-dimension structure relative earthquake hypocenters for this sequence. system processing flow was...

Megathrust earthquakes are strongly influenced by the elastic properties of rocks surrounding fault. In contrast to friction, these can be derived in situ from geophysical measurements along seismogenic zone. However, they often overestimated numerical simulations, particularly shallow megathrust. Here we explore influence that realistic depth-varying upper-plate megathrust have on earthquake r...

Abstract Lateral spatial variations of weak portions at the plate boundary in subduction zones have been estimated primarily by distribution slow earthquakes mainly occurring around seismogenic zones. However, detailed depth profile faults remains elusive. Here, we deployed six ocean bottom seismometers Nankai zone, Japan, to observe reflections originated from drilling vessel Chikyu ship noise...

The geothermal potential of West Mesa has historically been assumed to be small because it is thought to be dominated by a left-stepping transpressional regime that is generally tight and not conducive to open fluid pathways. This may not be the complete picture, however. The 85 MWe Heber geothermal project appears to be located in a right stepover from the northwest trending seismogenic extens...

Assessment of local seismicity caused by human engineering activity is a necessity after several earthquakes have been recorded in world practice, which destroyed hydraulic structure, dam and accompanied casualties. The Tupalang, Gissarak Pachkamar reservoirs, operated southern Uzbekistan, are located the mountain system part Tien Shan seismogenic fault. According to general seismic zoning, zon...

The geodynamic complexity in the western Mexican margin is controlled by multiple interactions between Rivera, Pacific, Cocos, and North American plates, as evidenced a high seismicity rate, most of whose hypocenters are poorly located. To mitigate this uncertainty with aim improving these hypocentral locations, we undertook TsuJal Project, passive seafloor seismic project conducted from April ...