scholarly journals Coseismic and Postseismic Crustal Deformation Associated With the 2016 Kumamoto Earthquake Sequence Revealed by PALSAR‐2 Pixel Tracking and InSAR

2020 ◽  
Vol 7 (10) ◽  
Author(s):  
Yuji Himematsu ◽  
Masato Furuya
Keyword(s):  
Crustal Deformation ◽  
Earthquake Sequence ◽  
2016 Kumamoto Earthquake ◽  
Kumamoto Earthquake ◽  
The 2016 Kumamoto Earthquake

scholarly journals Geotechnical and infrastructural damage due to the 2016 Kumamoto earthquake sequence

2018 ◽  
Vol 104 ◽  
pp. 390-394 ◽  
Author(s):  
S. Bhattacharya ◽  
M. Hyodo ◽  
G. Nikitas ◽  
B. Ismael ◽  
H. Suzuki ◽  
...  
Keyword(s):  
Earthquake Sequence ◽  
2016 Kumamoto Earthquake ◽  
Kumamoto Earthquake ◽  
The 2016 Kumamoto Earthquake

scholarly journals Strong motions observed by K-NET and KiK-net during the 2016 Kumamoto earthquake sequence

2017 ◽  
Vol 69 (1) ◽  
Author(s):  
Wataru Suzuki ◽  
Shin Aoi ◽  
Takashi Kunugi ◽  
Hisahiko Kubo ◽  
Nobuyuki Morikawa ◽  
...  
Keyword(s):  
Earthquake Sequence ◽  
2016 Kumamoto Earthquake ◽  
Kumamoto Earthquake ◽  
The 2016 Kumamoto Earthquake

scholarly journals Electrical conductive fluid-rich zones and their influence on the earthquake initiation, growth, and arrest processes: Observations from the 2016 Kumamoto earthquake sequence, Kyushu Island, Japan

2020 ◽  
Author(s):  
Koki Aizawa ◽  
Shinichi Takakura ◽  
Hisafumi Asaue ◽  
Katsuaki Koike ◽  
Ryokei Yoshimura ◽  
...  
Keyword(s):  
Broad Band ◽  
Quantitative Relationship ◽  
Outer Edge ◽  
Earthquake Sequence ◽  
2016 Kumamoto Earthquake ◽  
Magnetotelluric Data ◽  
Kumamoto Earthquake ◽  
Crustal Earthquakes ◽  
The 2016 Kumamoto Earthquake ◽  
Earthquake Ruptures

Abstract Crustal earthquake ruptures tend to initiate near fluid-rich zones. However, it is relatively unknown whether fluid-rich zones can further promote or arrest these ruptures. We image the electrical resistivity structure around the focal area of the 2016 Kumamoto earthquake sequence by using 200 sites broad-band magnetotelluric data, and discuss its quantitative relationship to earthquake initiation, growth, and arrest processes. The ruptures that initiated along the outer edge of the low-resistivity fluid-rich zones (<30 Ωm) tended to become large earthquakes, whereas those that initiated either distal to or within the fluid-rich zones did not. The ruptures were arrested by high-temperature (>400°C) fluid-rich zones, whereas shallower low-temperature (200–400°C) fluid-rich zones either promoted or arrested the ruptures. These results suggest that the distribution of mid-crustal fluids contributes to the initiation, growth, and arrest of crustal earthquakes. The pre-failure pressure/temperature gradient (spatial difference) of the pore fluids may contribute to the rupture initiation, propagation, and arrest.

scholarly journals Characteristics of the surface ruptures associated with the 2016 Kumamoto earthquake sequence, central Kyushu, Japan

2016 ◽  
Vol 68 (1) ◽  
Author(s):  
Yoshiki Shirahama ◽  
Masayuki Yoshimi ◽  
Yasuo Awata ◽  
Tadashi Maruyama ◽  
Takashi Azuma ◽  
...  
Keyword(s):  
Earthquake Sequence ◽  
2016 Kumamoto Earthquake ◽  
Kumamoto Earthquake ◽  
The 2016 Kumamoto Earthquake ◽  
Surface Ruptures

scholarly journals Electrical Conductive Fluidized Zones and Their Influence on the Earthquake Nucleation, Growth, and Arrest Processes of the 2016 Kumamoto Earthquake Sequence, Kyushu Island, Japan

2020 ◽  
Author(s):  
Koki Aizawa ◽  
Shinichi Takakura ◽  
Hisafumi Asaue ◽  
Katsuaki Koike ◽  
Ryokei Yoshimura ◽  
...  
Keyword(s):  
Broad Band ◽  
Quantitative Relationship ◽  
Earthquake Sequence ◽  
2016 Kumamoto Earthquake ◽  
Magnetotelluric Data ◽  
Low Resistivity ◽  
Kumamoto Earthquake ◽  
The 2016 Kumamoto Earthquake ◽  
Earthquake Nucleation ◽  
Nucleation Growth

Abstract Crustal earthquake ruptures tend to nucleate near fluidized zones. However, it is relatively unknown whether fluidized zones can further promote or arrest these ruptures. We image the electrical resistivity structure around the focal area of the 2016 Kumamoto earthquake sequence by using 200 sites broad-band magnetotelluric data, and discuss its quantitative relationship to earthquake nucleation, growth, and arrest processes. The result shows that the earthquake hypocenters are all located within 10 km from low-resistivity fluidized zones < 30Ωm. The ruptures that nucleated along the outer edge of the low-resistivity fluidized zones tended to become large earthquakes, whereas those that initiated either distal to or within the fluidized zones did not. The ruptures were arrested by high-temperature (>400°C) fluidized zones, whereas shallower low-temperature (200°C–400°C) fluidized zones either promoted or arrested the ruptures. These results suggest that the distribution of mid-crustal fluids contributes to the nucleation, growth, and arrest of crustal earthquakes.

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