Article
Geosciences, Multidisciplinary
Seiji Tsuno
Summary: In this study, an on-site P-wave earthquake early warning method based on site-specific spectral ratio of S-wave to P-wave was developed to efficiently issue earthquake warnings by incorporating site characteristics. The method showed good predictions for moderate-sized earthquakes in eastern Japan, but had limitations in predicting ground motions induced by large-scaled earthquakes.
FRONTIERS IN EARTH SCIENCE
(2021)
Review
Geochemistry & Geophysics
N. Uchida, R. Burgmann
Summary: Research has shown that there were indications of a potential great megathrust earthquake in NE Japan before the 2011 Tohoku earthquake, but a consensus assessment of the hazard was lacking. Since the earthquake, studies have made significant progress in revealing aspects such as coseismic rupture, aftershocks, and slow earthquakes.
REVIEWS OF GEOPHYSICS
(2021)
Article
Environmental Sciences
Quang Nguyen Hao, Satoshi Takewaka
Summary: The study revealed that the 2011 Great East Japan Earthquake had a significant impact on the shoreline of northern Ibaraki Coast, causing a sudden retreat of 20-40 meters. The recovery speed of the shoreline varied depending on beach conditions, ranging from +2.6 meters/year to +6.6 meters/year.
Article
Multidisciplinary Sciences
Kai Zhang, Yanru Wang, Yu Luo, Dineng Zhao, Mingwei Wang, Fanlin Yang, Ziyin Wu
Summary: The near-trench coseismic rupture behavior of the 2011 Tohoku-Oki earthquake is poorly understood due to lack of near-field observations. This study used differential bathymetry estimates with improved horizontal resolutions to investigate the near-trench coseismic slip behaviors. The results revealed a velocity-strengthening behavior in the shallow fault and significant off-fault deformation features near the backstop interface outcrop.
NATURE COMMUNICATIONS
(2023)
Article
Geosciences, Multidisciplinary
Nidam Siawsh, Konrad Peszynski, Huan Vo-Tran, Leslie Young
Summary: Community engagement and involvement are crucial in disaster management and response. This article explores the role of the Machizukuri in the recovery from the Tohoku Great East Japan Earthquake and Tsunami, highlighting the importance of local communities in filling the gaps left by the central government. However, coordination issues and communication failures hindered a more effective response. Bottom-up recovery practices have played a key role in maintaining the vitality and culture of the affected community.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2023)
Article
Geosciences, Multidisciplinary
A. Dielforder, G. M. Bocchini, K. Kemna, A. Hampel, R. M. Harrington, O. Oncken
Summary: Numerous normal-faulting aftershocks commonly occur in subduction forearcs after large megathrust earthquakes. The occurrence of postseismic normal faulting is due to stress changes induced by the stress drop along the megathrust. However, the details of forearc stress changes and aftershock triggering mechanisms are still not well understood. In this study, numerical force-balance models combined with Coulomb failure analysis are used to show that the stress drop along the megathrust can support normal faulting, and forearc-wide aftershock triggering is feasible within a narrow range of megathrust stress drop values and preseismic stress states.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Tomoaki Goto, Haruka Shibata, Takahiro Murakami
Summary: The study conducted between 2012 and 2014 in the Pacific coast of northeastern Japan revealed significant variation in the abundance and composition of marine debris, with plastic bags and household materials being the dominant terrestrial sources. The study also identified the latitudinal division of the study area based on debris abundance influenced by geographical and hydrodynamic features.
MARINE POLLUTION BULLETIN
(2021)
Article
Geosciences, Multidisciplinary
Qiushi Zhai, Zhigang Peng, Makoto Matsubara, Kazushige Obara, Yanbin Wang
Summary: This study investigates the spatiotemporal changes of intermediate-depth earthquakes in the double seismic zone beneath Central and Northeastern Japan before and after the 2011 Tohoku earthquake. The results show a clear increase in intermediate-depth earthquake rate following the Tohoku earthquake, with higher aftershock productivity in the upper plane compared to the lower plane.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Liming He, Lixin Wu, Kosuke Heki, Cong Guo
Summary: This study presents the anomalities of total electron content in the ionosphere before the 2011 M(w)9.0 Tohoku-oki earthquake, observed in northern Australia by the Global Navigation Satellite System (GNSS) stations. The onset time of the anomaly, determined by the Akaike's information criterion, is very close to the time observed in Japan. The positive TEC anomalies in Australia appear on the same longitude as the land area of NE Japan, supporting the model that electric fields within the ionosphere redistribute the electrons before large earthquakes.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Oceanography
Y. Wang, N. Zamora, M. Quiroz, K. Satake, R. Cienfuegos
Summary: This study focuses on investigating the resonance characteristics of trans-Pacific tsunami events in bays and continental shelves of Japan, revealing that regional seafloor topography is the key factor controlling resonance behaviors, while period components generated at far-field tsunami sources are more noticeable on signals recorded at offshore stations.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Geochemistry & Geophysics
Changzhi Zhai, Yibin Yao, Jian Kong
Summary: The electron density structures of seismo-traveling ionospheric disturbances (STIDs) during the Tohoku earthquake were reconstructed using three-dimensional computerized ionospheric tomography (3DCIT) for the first time, showing consistent results with COSMIC observations. Different types of STIDs exhibited varied speeds and propagation characteristics at different altitudes.
JOURNAL OF GEODESY
(2021)
Article
Engineering, Aerospace
Keke Xu, Rong He, Kezhao Li, Ankang Ren, Zhenhua Shao
Summary: By focusing on high-precision GNSS data processing and analysis, the study reveals the dynamic evolution of tectonics and crustal deformation along subduction zones. Common Mode Errors are removed, deformation signals are extracted, and regional spatiotemporal filtering is utilized to comprehensively display crustal motion characteristics.
ADVANCES IN SPACE RESEARCH
(2022)
Article
Engineering, Marine
Nguyen Trong Hiep, Hitoshi Tanaka, Nguyen Xuan Tinh
Summary: The Nobiru Coast has experienced changes in morphology and sediment budget over the past two centuries, primarily influenced by longshore transport and sediment supply from the Naruse River. However, the annual net sediment input has decreased due to the effects of the tsunami and human constructions.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Chaodi Xie, Ye Zhu, Yingfeng Ji, Weiling Zhu, Rui Qu
Summary: This study investigates the influence of tidal triggering on aftershocks following the 2011 Tohoku earthquake. It found that the aftershocks were triggered by short-period tides and that the mainshock rupture likely resulted in a critical stress state, facilitating tidal triggering.
APPLIED SCIENCES-BASEL
(2022)
Article
Multidisciplinary Sciences
Piero Bellanova, Mike Frenken, Yuichi Nishimura, Jan Schwarzbauer, Klaus Reicherter
Summary: The 2011 Tohoku-oki tsunami caused massive damage along the northern Japanese Aomori coast, with the coastal control area being inundated up to 550 m inland. A previously undocumented woody-organic tsunami deposit was discovered, improving understanding of the documented part of the tsunami inundation and reducing underestimation.
SCIENTIFIC REPORTS
(2021)