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DOI | 10.1073/pnas.2013806117 |
The origin of secondary microseism Love waves | |
Lucia Gualtieri; Etienne Bachmann; Frederik J. Simons; Jeroen Tromp | |
2020-11-09 | |
发表期刊 | Proceedings of the National Academy of Science |
出版年 | 2020 |
英文摘要 | The interaction of ocean surface waves produces pressure fluctuations at the seafloor capable of generating seismic waves in the solid Earth. The accepted mechanism satisfactorily explains secondary microseisms of the Rayleigh type, but it does not justify the presence of transversely polarized Love waves, nevertheless widely observed. An explanation for two-thirds of the worldwide ambient wave field has been wanting for over a century. Using numerical simulations of global-scale seismic wave propagation at unprecedented high frequency, here we explain the origin of secondary microseism Love waves. A small fraction of those is generated by boundary force-splitting at bathymetric inclines, but the majority is generated by the interaction of the seismic wave field with three-dimensional heterogeneity within the Earth. We present evidence for an ergodic model that explains observed seismic wave partitioning, a requirement for full-wave field ambient-noise tomography to account for realistic source distributions. |
领域 | 地球科学 |
URL | 查看原文 |
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/304044 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Lucia Gualtieri,Etienne Bachmann,Frederik J. Simons,et al. The origin of secondary microseism Love waves[J]. Proceedings of the National Academy of Science,2020. |
APA | Lucia Gualtieri,Etienne Bachmann,Frederik J. Simons,&Jeroen Tromp.(2020).The origin of secondary microseism Love waves.Proceedings of the National Academy of Science. |
MLA | Lucia Gualtieri,et al."The origin of secondary microseism Love waves".Proceedings of the National Academy of Science (2020). |
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