DOI: 10.1002/2016GL070858
论文题名: Existence of the threshold pressure for seismic excitation by atmospheric disturbances
作者: Tanimoto T. ; Valovcin A.
刊名: Geophysical Research Letters
ISSN: 0094-8417
EISSN: 1944-8148
出版年: 2016
卷: 43, 期: 21 起始页码: 11202
结束页码: 11208
语种: 英语
英文关键词: critical pressure
; land-atmosphere interaction
Scopus关键词: Atmospheric pressure
; Hurricanes
; Power spectral density
; Spectral density
; Storms
; Atmospheric disturbance
; Critical pressures
; Land atmosphere interaction
; Orders of magnitude
; Power spectral densities (PSD)
; Seismic excitations
; Threshold pressures
; Vertical ground motion
; Seismology
英文摘要: Excitation of seismic waves by atmospheric pressure changes is examined from data for two tropical cyclones, Tropical Storm Lee (2011) and Hurricane Isaac (2012). They moved through the EarthScope Transportable Array and generated variations in pressure and ground motions that spanned 4–5 orders of magnitude in power spectral density (PSD). For vertical seismic ground velocity PSD (SV) for frequencies between 0.01 and 0.02 Hz, there is a threshold pressure at about pressure PSD (SP) of 10 Pa2 s, below which vertical motion is not affected by local atmospheric pressure. Above this threshold pressure, vertical ground motion increases with surface pressure as SV~SP 1.5. In order to understand the land-atmosphere interaction, pressure above this threshold is the only useful range. Horizontal component PSDs are about 2 orders of magnitude larger than vertical component PSDs and change with pressure for its entire range. This overall trend is most likely caused by ground tilt. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84998785518&doi=10.1002%2f2016GL070858&partnerID=40&md5=8a687be30baa78b2a48e49373742d194
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9380
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Department of Earth Science and Earth Research Institute, University of California, Santa Barbara, CA, United States
Recommended Citation:
Tanimoto T.,Valovcin A.. Existence of the threshold pressure for seismic excitation by atmospheric disturbances[J]. Geophysical Research Letters,2016-01-01,43(21).