scholarly journals The impact of megasplay faulting and permeability contrasts on Nankai Trough subduction zone pore pressures

2012 ◽  
Vol 39 (22) ◽  
pp. n/a-n/a ◽  
Author(s):  
Elizabeth J. Screaton ◽  
Shemin Ge
Keyword(s):  
Subduction Zone ◽  
Nankai Trough ◽  
Pore Pressures ◽  
The Impact

Imaging of the subducted Kyushu-Palau Ridge in the Hyuga-nada region, western Nankai Trough subduction zone

2013 ◽  
Vol 589 ◽  
pp. 90-102 ◽  
Author(s):  
Yojiro Yamamoto ◽  
Koichiro Obana ◽  
Tsutomu Takahashi ◽  
Ayako Nakanishi ◽  
Shuichi Kodaira ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Nankai Trough

scholarly journals Inferred pore pressures at the Costa Rica subduction zone: implications for dewatering processes

2000 ◽  
Vol 177 (3-4) ◽  
pp. 193-207 ◽  
Author(s):  
Demian M. Saffer ◽  
Eli A. Silver ◽  
Andrew T. Fisher ◽  
Harold Tobin ◽  
Kate Moran
Keyword(s):  
Costa Rica ◽  
Subduction Zone ◽  
Pore Pressures

scholarly journals Temperature limits to deep subseafloor life in the Nankai Trough subduction zone

Science ◽  
2020 ◽  
Vol 370 (6521) ◽  
pp. 1230-1234
Author(s):  
Verena B. Heuer ◽  
Fumio Inagaki ◽  
Yuki Morono ◽  
Yusuke Kubo ◽  
Arthur J. Spivack ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Marine Sediment ◽  
Nankai Trough ◽  
Microbial Populations ◽  
Vegetative Cells ◽  
Microbial Life ◽  
Sediment Volume ◽  
Subsurface Sediments ◽  
Cell Concentrations ◽  
Deep Subseafloor

Microorganisms in marine subsurface sediments substantially contribute to global biomass. Sediments warmer than 40°C account for roughly half the marine sediment volume, but the processes mediated by microbial populations in these hard-to-access environments are poorly understood. We investigated microbial life in up to 1.2-kilometer-deep and up to 120°C hot sediments in the Nankai Trough subduction zone. Above 45°C, concentrations of vegetative cells drop two orders of magnitude and endospores become more than 6000 times more abundant than vegetative cells. Methane is biologically produced and oxidized until sediments reach 80° to 85°C. In 100° to 120°C sediments, isotopic evidence and increased cell concentrations demonstrate the activity of acetate-degrading hyperthermophiles. Above 45°C, populated zones alternate with zones up to 192 meters thick where microbes were undetectable.

scholarly journals Hydrocarbon seepage and its sources at mud volcanoes of the Kumano forearc basin, Nankai Trough subduction zone

2014 ◽  
Vol 15 (6) ◽  
pp. 2180-2194 ◽  
Author(s):  
Thomas Pape ◽  
Patrizia Geprägs ◽  
Sebastian Hammerschmidt ◽  
Paul Wintersteller ◽  
Jiangong Wei ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Nankai Trough ◽  
Mud Volcanoes ◽  
Forearc Basin

Estimating the Nankai Trough Megathrust Earthquake’s Anticipated Fiscal Impact on Japanese Governments

2020 ◽  
Vol 15 (5) ◽  
pp. 633-644
Author(s):  
Takeshi Miyazaki ◽  
Shingo Nagamatsu ◽  
◽  
◽  
Keyword(s):  
Local Governments ◽  
Nankai Trough ◽  
Seismic Intensity ◽  
Great East Japan Earthquake ◽  
Fiscal Impact ◽  
Local Public Finance ◽  
Damage Data ◽  
Fiscal Revenue ◽  
The Impact ◽  
Nankai Earthquake

This study estimates the fiscal impact of the anticipated Nankai Trough Megathrust Earthquake on both the national and local Japanese governments to identify their sovereign risk. First, we estimate the impact of the Great East Japan Earthquake on local public finance using panel data regressions on 2008–2015 fiscal data. Second, based on the anticipated damage data – seismic intensity and area of inundation – of the Nankai earthquake and the coefficients derived from the first step, we estimate the amounts of fiscal revenue and expenditures that would be required by every local government for the anticipated Nankai earthquake. Finally, we estimate the fiscal expenditure of the national government in proportion to the estimated local ones. We find that first, the estimated fiscal requirements in the two years after the earthquake are about JPY 161 trillion, 5.9 times those of the 2011 Great East Japan Earthquake. Second, the financial disparity between affected and non-affected local governments is large because the Nankai earthquake would affect more municipalities than the Great East Japan Earthquake. The fiscal burden of non-affected municipalities would be relatively higher. These findings indicate that the Nankai earthquake will not only be a local disaster but also a national catastrophe.

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