| DOI: | 10.1002/2015GL067598
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| 论文题名: | Seismic shear waves as Foucault pendulum |
| 作者: | Snieder R.; Sens-Schönfelder C.; Ruigrok E.; Shiomi K.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9216
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| EISSN: | 1944-8947
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| 出版年: | 2016
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| 卷: | 43, 期:6 | | 起始页码: | 2576
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| 结束页码: | 2581
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| 语种: | 英语
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| 英文关键词: | body waves
; seismology
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| Scopus关键词: | Pendulums
; Polarization
; Rotation
; Seismic waves
; Seismology
; Shear waves
; Wavefronts
; Body waves
; Foucault Pendulum
; Longitudinal components
; Northern Hemispheres
; Polarization planes
; Source mechanisms
; Transverse components
; Transverse polarization
; Shear flow
; body wave
; Coriolis force
; Earth rotation
; instrumentation
; Northern Hemisphere
; oscillation
; P-wave
; particle motion
; polarization
; S-wave
; seismology
; wave propagation
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| 英文摘要: | Earth's rotation causes splitting of normal modes. Wave fronts and rays are, however, not affected by Earth's rotation, as we show theoretically and with observations made with USArray. We derive that the Coriolis force causes a small transverse component for P waves and a small longitudinal component for S waves. More importantly, Earth's rotation leads to a slow rotation of the transverse polarization of S waves; during the propagation of S waves the particle motion behaves just like a Foucault pendulum. The polarization plane of shear waves counteracts Earth's rotation and rotates clockwise in the Northern Hemisphere. The rotation rate is independent of the wave frequency and is purely geometric, like the Berry phase. Using the polarization of ScS and ScS2 waves, we show that the Foucault-like rotation of the S wave polarization can be observed. This can affect the determination of source mechanisms and the interpretation of observed SKS splitting. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84963517276&doi=10.1002%2f2015GL067598&partnerID=40&md5=6c0dc4585d05922ff41a31755fc121a8
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/10179
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Center for Wave Phenomena, Colorado School of Mines, Golden, CO, United States
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| Recommended Citation: | |
Snieder R.,Sens-Schönfelder C.,Ruigrok E.,et al. Seismic shear waves as Foucault pendulum[J]. Geophysical Research Letters,2016-01-01,43(6).
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