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DOI | 10.1029/2019GL082474 |
Source-Dependent Amplification of Earthquake Ground Motions in Deep Sedimentary Basins | |
Wirth, Erin A.1,2; Vidale, John E.2,3; Frankel, Arthur D.1; Pratt, Thomas L.4; Marafi, Nasser A.5; Thompson, Mika2; Stephenson, William J.6 | |
2019-06-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:12页码:6443-6450 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Deep sedimentary basins amplify long-period shaking from seismic waves, increasing the seismic hazard for cities sited on such basins. We perform 3-D simulations of point source earthquakes distributed around the Seattle and Tacoma basins in Washington State to examine the dependence of basin amplification on source azimuth, depth, and earthquake type. For periods between 1 and 10 s, the pattern of amplification is spatially heterogeneous and differs considerably with the source-to-site azimuth. For close-in earthquakes, the greatest basin amplification occurs toward the farside of the basin and ground motions from crustal earthquakes experience greater amplification than those from more vertically incident, deeper intraplate earthquakes. Love and Rayleigh waves form similar spatial patterns for a given source location, although the magnitude of amplification varies. The source dependence of basin amplification is an important factor for seismic hazard assessment, in both the Seattle and Tacoma basins, and by extension for deep sedimentary basins worldwide. Plain Language Summary Sedimentary basins amplify the ground shaking due to an earthquake. This increases the seismic hazard for cities located above such basins. Therefore, determining the amount and distribution of shaking amplification is critical to estimating the hazard associated with future earthquakes. We use computer simulations to determine how an earthquake's location, depth, and focal mechanism affect ground shaking for communities above the Seattle and Tacoma sedimentary basins, Washington State. We find that the amount of shaking amplification strongly depends on where the earthquake is located, as well as the earthquake type. This has important implications for seismic safety (e.g., for buildings and infrastructure) located above deep sedimentary basins worldwide. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000477616300033 |
WOS关键词 | BAND SYNTHETIC SEISMOGRAMS ; MAGNITUDE 9 EARTHQUAKES ; LOS-ANGELES BASIN ; STOCHASTIC SYNTHETICS ; 3D SIMULATIONS ; SEISMIC-WAVES ; WASHINGTON ; SEATTLE ; CALIFORNIA ; SPECTRA |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/184232 |
专题 | 气候变化 |
作者单位 | 1.US Geol Survey, Seattle, WA 98104 USA; 2.Univ Washington, Dept Earth & Space Sci, Seattle, WA 98195 USA; 3.Univ Southern Calif, Dept Earth Sci, Los Angeles, CA USA; 4.US Geol Survey, 959 Natl Ctr, Reston, VA 22092 USA; 5.Univ Washington, Dept Civil & Environm Engn, Seattle, WA 98195 USA; 6.US Geol Survey, Box 25046, Denver, CO 80225 USA |
推荐引用方式 GB/T 7714 | Wirth, Erin A.,Vidale, John E.,Frankel, Arthur D.,et al. Source-Dependent Amplification of Earthquake Ground Motions in Deep Sedimentary Basins[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(12):6443-6450. |
APA | Wirth, Erin A..,Vidale, John E..,Frankel, Arthur D..,Pratt, Thomas L..,Marafi, Nasser A..,...&Stephenson, William J..(2019).Source-Dependent Amplification of Earthquake Ground Motions in Deep Sedimentary Basins.GEOPHYSICAL RESEARCH LETTERS,46(12),6443-6450. |
MLA | Wirth, Erin A.,et al."Source-Dependent Amplification of Earthquake Ground Motions in Deep Sedimentary Basins".GEOPHYSICAL RESEARCH LETTERS 46.12(2019):6443-6450. |
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