globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2020.116683
论文题名:
Quantifying strong seismic propagation effects in the upper volcanic edifice using sensitivity kernels
作者: Martínez Montesinos B.; Bean C.J.; Lokmer I.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 554
语种: 英语
中文关键词: near surface volcano structure ; numerical seismic simulations ; sensitivity kernels ; volcanic edifice ; volcano seismic sources
英文关键词: Buildings ; Seismic waves ; Sensitivity analysis ; Volcanoes ; Wave propagation ; Long period seismic event ; Seismic propagation ; Sensitivity kernels ; Synthetic seismogram ; Two dimensional model ; Velocity structure ; Volcanic environment ; Volcanic structures ; Seismology ; computer simulation ; magma ; seismic source ; seismic wave ; sensitivity analysis ; volcano ; wave propagation ; Catania [Sicily] ; Etna ; Italy ; Sicily
英文摘要: In volcanic environments, the correct interpretation of the signals recorded by a seismic station is critical for a determination of the internal state of the volcano. Those signals contain information about both the seismic source and the properties of the path travelled by the seismic wave. Therefore, understanding the path effect is necessary for both source inversions and geophysical investigation of the volcanoes' properties at depth. We present an application of the seismic adjoint methodology and sensitivity kernel analysis to investigate seismic wave propagation effects in the upper volcanic edifice. We do this by performing systematic numerical simulations to calculate synthetic seismograms in two-dimensional models of Mount Etna, Italy, considering different wave velocity properties. We investigate the relationship between different portions of a seismogram and different parts of the structural volcano model. In particular, we examine the influence of known near-surface low-velocity volcanic structure on the recorded seismic signals. Results improve our ability to understand path effects highlighting the importance of the shallowest velocity structure in shaping the recorded seismograms and support recent studies that show that, although long-period seismic events are commonly associated with magma movements in resonant conduits, these events can be reproduced without the presence of fluids. We conclude that edifice heterogeneities impart key signatures on volcano seismic traces that must be considered when investigating volcano seismic sources. © 2020
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165592
Appears in Collections:气候变化与战略

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作者单位: School Of Earth Sciences, University College Dublin, Dublin 4, Ireland; Geophysics Section, School of Cosmic Physics, Dublin Institute for Advanced Studies, Dublin 2, Ireland

Recommended Citation:
Martínez Montesinos B.,Bean C.J.,Lokmer I.. Quantifying strong seismic propagation effects in the upper volcanic edifice using sensitivity kernels[J]. Earth and Planetary Science Letters,2021-01-01,554
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