气候变化领域集成服务门户(CCPortal): Quantifying strong seismic propagation effects in the upper volcanic edifice using sensitivity kernels

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DOI	10.1016/j.epsl.2020.116683
	Quantifying strong seismic propagation effects in the upper volcanic edifice using sensitivity kernels
	Martínez Montesinos B.; Bean C.J.; Lokmer I.
发表日期	2021
ISSN	0012821X
卷号	554
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
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
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203214
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
推荐引用方式 GB/T 7714	Martínez Montesinos B.,Bean C.J.,Lokmer I.. Quantifying strong seismic propagation effects in the upper volcanic edifice using sensitivity kernels[J],2021,554.
APA	Martínez Montesinos B.,Bean C.J.,&Lokmer I..(2021).Quantifying strong seismic propagation effects in the upper volcanic edifice using sensitivity kernels.Earth and Planetary Science Letters,554.
MLA	Martínez Montesinos B.,et al."Quantifying strong seismic propagation effects in the upper volcanic edifice using sensitivity kernels".Earth and Planetary Science Letters 554(2021).