Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL091421 |
Mapping the sources of proximal earthquake infrasound | |
J. B. Johnson; T. D. Mikesell; J. F. Anderson; L. M. Liberty | |
2020-11-23 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | We recorded a MWR3.6 earthquake in Idaho (USA) on 7 April 2020 with a network of six three‐element infrasound arrays and co‐located broadband seismometers situated within 25 km of the hypocenter. Infrasound array processing is used to identify the arrival of seismic‐to‐atmospheric coupled phases and as much as 90 s of infrasound coda. Apparent velocities ranging from seismic speeds to sub‐horizontal atmospheric sound speeds are attributed to a superposition of coincident waves arriving at the arrays. We find that the arriving infrasound originates from a broad range of back azimuths that deviates from epicentral back azimuth and indicates the ubiquity of secondary radiators for this relatively small earthquake. Secondary radiators, which often locate in regions of elevated topography, are identified using backprojections and earthquake initiation time. Analysis of infrasound sources from proximal earthquakes can be used to map ground shaking distributions, which are important for assessment of earthquake hazards. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/304818 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | J. B. Johnson,T. D. Mikesell,J. F. Anderson,et al. Mapping the sources of proximal earthquake infrasound[J]. Geophysical Research Letters,2020. |
APA | J. B. Johnson,T. D. Mikesell,J. F. Anderson,&L. M. Liberty.(2020).Mapping the sources of proximal earthquake infrasound.Geophysical Research Letters. |
MLA | J. B. Johnson,et al."Mapping the sources of proximal earthquake infrasound".Geophysical Research Letters (2020). |
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