scholarly journals Along‐trench variations in the seismic structure of the incoming Pacific plate at the outer rise of the northern Japan Trench

2016 ◽  
Vol 43 (2) ◽  
pp. 666-673 ◽  
Author(s):  
Gou Fujie ◽  
Shuichi Kodaira ◽  
Takeshi Sato ◽  
Tsutomu Takahashi
Keyword(s):  
Pacific Plate ◽  
Japan Trench ◽  
Seismic Structure ◽  
Outer Rise ◽  
Northern Japan

scholarly journals A new type of intra-plate volcanism; Young alkali-basalts discovered from the subducting Pacific Plate, Northern Japan Trench

2001 ◽  
Vol 28 (14) ◽  
pp. 2719-2722 ◽  
Author(s):  
N. Hirano ◽  
K. Kawamura ◽  
M. Hattori ◽  
K. Saito ◽  
Y. Ogawa
Keyword(s):  
Pacific Plate ◽  
Japan Trench ◽  
Alkali Basalts ◽  
New Type ◽  
Northern Japan

scholarly journals Seismic Structure of the Oceanic Crust Around Petit‐Spot Volcanoes in the Outer‐Rise Region of the Japan Trench

2018 ◽  
Vol 45 (20) ◽  
Author(s):  
Akane Ohira ◽  
Shuichi Kodaira ◽  
Gou Fujie ◽  
Tetsuo No ◽  
Yasuyuki Nakamura ◽  
...  
Keyword(s):  
Oceanic Crust ◽  
Japan Trench ◽  
Seismic Structure ◽  
Outer Rise

scholarly journals Seafloor Displacement After the 2011 Tohoku-oki Earthquake in the Northern Japan Trench Examined by Repeated Bathymetric Surveys

2017 ◽  
Vol 44 (23) ◽  
pp. 11,833-11,839 ◽  
Author(s):  
Toshiya Fujiwara ◽  
Christian dos Santos Ferreira ◽  
Anna Katharina Bachmann ◽  
Michael Strasser ◽  
Gerold Wefer ◽  
...  
Keyword(s):  
Japan Trench ◽  
Northern Japan

scholarly journals Sedimentation of natural radionuclides on the seabed across the northern Japan Trench.

1996 ◽  
Vol 30 (4) ◽  
pp. 217-229 ◽  
Author(s):  
Che Abd. Rahim Mohamed ◽  
Hisashi Narita ◽  
Koh Harada ◽  
Shizuo Tsunogai
Keyword(s):  
Natural Radionuclides ◽  
Japan Trench ◽  
Northern Japan

scholarly journals First measurement of the displacement rate of the Pacific Plate near the Japan Trench after the 2011 Tohoku-Oki earthquake using GPS/acoustic technique

2015 ◽  
Vol 42 (20) ◽  
pp. 8391-8397 ◽  
Author(s):  
Fumiaki Tomita ◽  
Motoyuki Kido ◽  
Yukihito Osada ◽  
Ryota Hino ◽  
Yusaku Ohta ◽  
...  
Keyword(s):  
Pacific Plate ◽  
Japan Trench ◽  
Displacement Rate ◽  
Acoustic Technique ◽  
The Pacific

scholarly journals Frequency dispersion amplifies tsunamis caused by outer-rise normal faults

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Toshitaka Baba ◽  
Naotaka Chikasada ◽  
Kentaro Imai ◽  
Yuichiro Tanioka ◽  
Shuichi Kodaira
Keyword(s):  
Water Waves ◽  
Frequency Dispersion ◽  
Japan Trench ◽  
Normal Faults ◽  
Ocean Bottom ◽  
Hazard Maps ◽  
Tsunami Height ◽  
Tsunami Inundation ◽  
Outer Rise ◽  
Spatial Dimensions

AbstractAlthough tsunamis are dispersive water waves, hazard maps for earthquake-generated tsunamis neglect dispersive effects because the spatial dimensions of tsunamis are much greater than the water depth, and dispersive effects are generally small. Furthermore, calculations that include non-dispersive effects tend to predict higher tsunamis than ones that include dispersive effects. Although non-dispersive models may overestimate the tsunami height, this conservative approach is acceptable in disaster management, where the goal is to save lives and protect property. However, we demonstrate that offshore frequency dispersion amplifies tsunamis caused by outer-rise earthquakes, which displace the ocean bottom downward in a narrow area, generating a dispersive short-wavelength and pulling-dominant (water withdrawn) tsunami. We compared observational evidence and calculations of tsunami for a 1933 Mw 8.3 outer-rise earthquake along the Japan Trench. Dispersive (Boussinesq) calculations predicted significant frequency dispersion in the 1933 tsunami. The dispersive tsunami deformation offshore produced tsunami inundation heights that were about 10% larger than those predicted by non-dispersive (long-wave) calculations. The dispersive tsunami calculations simulated the observed tsunami inundation heights better than did the non-dispersive tsunami calculations. Contrary to conventional practice, we conclude that dispersive calculations are essential when preparing deterministic hazard maps for outer-rise tsunamis.

Sign in / Sign up

Export Citation Format

Share Document