DOI: 10.1002/grl.51001
论文题名: Recovering coseismic point ground tilts from collocated high-rate GPS and accelerometers
作者: Geng J. ; Melgar D. ; Bock Y. ; Pantoli E. ; Restrepo J.
刊名: Geophysical Research Letters
ISSN: 0094-8505
EISSN: 1944-8236
出版年: 2013
卷: 40, 期: 19 起始页码: 5095
结束页码: 5100
语种: 英语
英文关键词: Accelerometers
; Coseismic point tilts
; High-rate GPS
; Integration
Scopus关键词: Accelerometer measurement
; Coseismic point tilts
; Earthquake source
; High rate
; Ring laser gyroscope
; Rotational component
; Seismic wavefields
; Strong motion records
; Accelerometers
; Estimation
; Integration
; Ring lasers
; Earthquakes
; accelerometer
; coseismic process
; earthquake event
; earthquake magnitude
; geodetic network
; GPS
; integrated approach
; strain rate
英文摘要: Rotational along with translational and strain measurements are essential for a complete description of the motion of a deformable body in a seismic event. We propose a new seismogeodetic approach where collocated high-rate GPS and accelerometer measurements are combined to estimate permanent and dynamic coseismic ground tilts at a point, whereas at present, only dynamic tilts are measured with either a dense seismic array or an expensive ring laser gyroscope. We estimate point tilts for a five-story structure on a shake table subjected to 13 earthquake strong motion records of increasing intensity. For the most intense record from the 2002 M7.9 Denali earthquake, we observe a peak-to-peak dynamic tilt of 0.12° and a permanent tilt of 0.16° for the structure's roof. Point tilts derived from networks of collocated GPS and accelerometers can be used to estimate the rotational component of the seismic wavefield for improved earthquake source characterization. Key Points Coseismic point ground tilts are derived from collocated GPS and accelerometer Both permanent and dynamic tilts are recovered at 0.01-degree resolution Coseismic tilts along major faults may lead to improved source imaging ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84885011133&doi=10.1002%2fgrl.51001&partnerID=40&md5=3688b92725ca2653cfbd994b3db1341e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5769
Appears in Collections: 气候减缓与适应
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作者单位: Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Dr., San Diego, CA, 92093, United States
Recommended Citation:
Geng J.,Melgar D.,Bock Y.,et al. Recovering coseismic point ground tilts from collocated high-rate GPS and accelerometers[J]. Geophysical Research Letters,2013-01-01,40(19).