| Item type |
文献 / Documents(1) |
| 公開日 |
2022-01-14 |
| アクセス権 |
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アクセス権 |
open access |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 出版社版DOI |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1029/2020JB020060 |
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言語 |
ja |
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関連名称 |
10.1029/2020JB020060 |
| 出版タイプ |
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|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| タイトル |
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タイトル |
Deep Investigations of Outer-Rise Tsunami Characteristics Using Well-Mapped Normal Faults Along the Japan Trench |
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言語 |
en |
| 著者 |
馬場, 俊孝
チカサダ, ナオタカ
ナカムラ, ヤスユキ
フジエ, ゴウ
オバナ, コウイチロウ
ミウラ, セイイチ
コダイラ, シュウイチ
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| 抄録 |
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内容記述タイプ |
Abstract |
|
内容記述 |
To assess the risk of tsunamis from outer-rise earthquakes, we carried out tsunami simulations using 33 simple rectangular fault models with 60° dip angles based on marine seismic observations and surveys of the Japan Trench. The largest tsunami resulting from these models, produced by a Mw 8.7 normal-faulting event on a fault 332 km long, had a maximum height of 27.0 m. We tested variations of the predictions due to the uncertainties in the assumed parameters. Because the actual dip angles of the Japan Trench outer-rise faults range from 45° to 75°, we calculated tsunamis from earthquakes on fault models with 45°, 60°, and 75° dip angles. We also tested a compound fault model with 75° dip in the upper half and 45° dip in the lower half. Rake angles were varied by ±15°. We also tested models consisting of small subfaults with dimensions of about 60 km, models using other earthquake scaling laws, models with heterogeneous slips, and models incorporating dispersive tsunami effects. Predicted tsunami heights changed by 10–15% for heterogeneous slips, up to 10% for varying dip angles, about 5–10% from considering tsunami dispersion, about 2% from varying rake angles, and about 1% from using the model with small subfaults. The use of different earthquake scaling laws changed predicted tsunami heights by about 50% on average for the 33 fault models. We emphasize that the earthquake scaling law used in tsunami predictions for outer-rise earthquakes should be chosen with great care. |
|
言語 |
en |
| 書誌情報 |
en : Journal of Geophysical Research: Solid Earth
巻 125,
号 10,
p. e2020JB020060,
発行日 2020-09-17
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| 収録物ID |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
21699356 |
| 収録物ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA12875632 |
| 出版者 |
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出版者 |
American Geophysical Union |
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言語 |
en |
| 出版者 |
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出版者 |
Wiley |
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言語 |
en |
| 権利情報 |
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言語 |
en |
|
権利情報 |
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| EID |
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|
識別子 |
378701 |
|
識別子タイプ |
URI |
| 言語 |
|
|
言語 |
eng |
jgrse_125_10_e2020JB020060.pdf (18.5 MB)
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