Migration of Very Long Period Seismicity at Aso Volcano, Japan, Associated With the 2016 Kumamoto Earthquake

2019 ◽  
Vol 46 (15) ◽  
pp. 8763-8771 ◽  
Author(s):  
Andri Hendriyana ◽  
Takeshi Tsuji
Keyword(s):  
2016 Kumamoto Earthquake ◽  
Aso Volcano ◽  
Kumamoto Earthquake ◽  
Long Period ◽  
The 2016 Kumamoto Earthquake

scholarly journals Surface displacements of Aso volcano after the 2016 Kumamoto earthquake based on SAR interferometry: implications for dynamic triggering of earthquake–volcano interactions

2019 ◽  
Vol 218 (2) ◽  
pp. 755-761
Author(s):  
Wataru Yamada ◽  
Kazuya Ishitsuka ◽  
Toru Mogi ◽  
Mitsuru Utsugi
Keyword(s):  
Synthetic Aperture Radar ◽  
Main Shock ◽  
Synthetic Aperture ◽  
Source Depth ◽  
2016 Kumamoto Earthquake ◽  
Aso Volcano ◽  
Kumamoto Earthquake ◽  
Surface Displacements ◽  
The 2016 Kumamoto Earthquake ◽  
Aperture Radar

SUMMARY The 2016 Kumamoto earthquake involved a series of events culminating in an Mw 7.0 main shock on 2016 April 16; the main-shock fault terminated in the caldera of Aso volcano. In this study, we estimated surface displacements after the 2016 Kumamoto earthquake using synthetic aperture radar interferometry analysis of 16 Phased Array Type L-band Synthetic Aperture Radar-2 images acquired from 2016 April 18 to 2017 June 12 and compared them with four images acquired before the earthquake. Ground subsidence of about 8 cm was observed within about a 3 km radius in the northwestern part of Aso caldera. Because this displacement was not seen in data acquired before the 2016 Kumamoto earthquake, we attribute this displacement to the 2016 Kumamoto earthquake. Furthermore, to estimate the source depth of the surface displacement, we applied the Markov chain Monte Carlo method to a spherical source model and obtained a source depth of about 4.8 km. This depth and position are nearly in agreement with the top of a low-resistivity area previously inferred from magnetotelluric data; this area is thought to represent a deep hydrothermal reservoir. We concluded that this displacement is due to the migration of magma or aqueous fluids.

scholarly journals Rupture process of the 2016 Kumamoto earthquake in relation to the thermal structure around Aso volcano

2016 ◽  
Vol 68 (1) ◽  
Author(s):  
Yuji Yagi ◽  
Ryo Okuwaki ◽  
Bogdan Enescu ◽  
Amato Kasahara ◽  
Ayumu Miyakawa ◽  
...  
Keyword(s):  
Thermal Structure ◽  
Rupture Process ◽  
2016 Kumamoto Earthquake ◽  
Aso Volcano ◽  
Kumamoto Earthquake ◽  
The 2016 Kumamoto Earthquake
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