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DOI | 10.1029/2019GL084892 |
Frequency-Dependent P Wave Polarization and Its Subwavelength Near-Surface Depth Sensitivity | |
Park, Sunyoung1; Tsai, Victor C.2; Ishii, Miaki3 | |
2019-12-19 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | USA |
英文摘要 | Near-surface structure is crucial to assessing seismic hazards and understanding earthquakes and surface processes yet is a major challenge to robustly image. Recently, an approach based on body-wave polarization was introduced for constraining shallow seismic structure, but the depth sensitivity of the polarization measurement has remained unclear. Using waveform simulations based on a layer over a half space, we find that the depth sensitivity of P wave polarization peaks at the surface and decreases abruptly over a depth range shorter than its wavelength. A strong frequency dependence provides constraints on local 1-D structure, with frequencies between 0.1 and 10 Hz illuminating structure at depths of 10 m to several kilometers. Applying these results to teleseismic recordings in Japan provides constraints on structure at about 120 to 750 m, including a distinctive weak zone along the Median Tectonic Line in the Kii peninsula and Awaji Island. |
英文关键词 | body-wave polarization depth sensitivity near-surface structure site characterization seismic hazard assessment Japan |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000503343100001 |
WOS关键词 | TRAVEL-TIMES ; CRUST ; EARTHQUAKE ; ANISOTROPY ; KERNELS |
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/225220 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA; 2.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA; 3.Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA |
推荐引用方式 GB/T 7714 | Park, Sunyoung,Tsai, Victor C.,Ishii, Miaki. Frequency-Dependent P Wave Polarization and Its Subwavelength Near-Surface Depth Sensitivity[J]. GEOPHYSICAL RESEARCH LETTERS,2019. |
APA | Park, Sunyoung,Tsai, Victor C.,&Ishii, Miaki.(2019).Frequency-Dependent P Wave Polarization and Its Subwavelength Near-Surface Depth Sensitivity.GEOPHYSICAL RESEARCH LETTERS. |
MLA | Park, Sunyoung,et al."Frequency-Dependent P Wave Polarization and Its Subwavelength Near-Surface Depth Sensitivity".GEOPHYSICAL RESEARCH LETTERS (2019). |
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