Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 38, Issue -, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2011GL048355
Keywords
-
Categories
Funding
- MEXT, Japan
- JSPS KAKENHI [20244070]
- MEXT KAKENHI [21107007]
- Grants-in-Aid for Scientific Research [20244070, 23900002, 21107007, 21340129] Funding Source: KAKEN
Ask authors/readers for more resources
We report an uplift of 5 m with a horizontal displacement of more than 60 m due to the 2011 Tohoku-Oki earthquake. The uplift was measured by an ocean-bottom pressure gauge installed before the earthquake on a frontal wedge, which formed an uplift system near the Japan Trench. Horizontal displacements of the frontal wedge were measured using local benchmark displacements obtained by acoustic ranging before and after the earthquake. The average displacements at the frontal wedge were 58 m east and 74 m east-southeast. These results strongly suggest a huge coseismic slip beneath the frontal wedge on the plate boundary. The estimated magnitude of the slip along the main fault was 80 m near the trench. Our results suggest that the horizontal and vertical deformations of the frontal wedge due to the slip generated the tremendous tsunami that struck the coastal area of northeastern Japan. Citation: Ito, Y., T. Tsuji, Y. Osada, M. Kido, D. Inazu, Y. Hayashi, H. Tsushima, R. Hino, and H. Fujimoto (2011), Frontal wedge deformation near the source region of the 2011 Tohoku-Oki earthquake, Geophys. Res. Lett., 38, L00G05, doi:10.1029/2011GL048355.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available