DOI: 10.1002/2015GL065024
论文题名: Lahar infrasound associated with Volcán Villarrica's 3 March 2015 eruption
作者: Johnson J.B. ; Palma J.L.
刊名: Geophysical Research Letters
ISSN: 0094-8631
EISSN: 1944-8362
出版年: 2015
卷: 42, 期: 15 起始页码: 6324
结束页码: 6331
语种: 英语
英文关键词: array processing
; infrasound
; lahar
Scopus关键词: Hazards
; Average speed
; Cross correlations
; Hazard monitoring
; Infrasound
; Initial flow
; Lag time
; Lahar
; Array processing
; array
; environmental monitoring
; hazard assessment
; infrasonics
; lahar
; signal
; volcanic eruption
; Chile
; Southern Volcanic Zone
; Villarrica Volcano
英文摘要: The paroxysmal 2015 eruption of Volcán Villarrica (Chile) produced a 2.5 h long lahar, which descended more than 20 km within the Rio Correntoso/Turbio drainage and destroyed two small bridges. A three-element infrasound array 10 km from the summit, and 4 km from the lahar's closest approach, was used to study the flow's progression. Array processing using cross-correlation lag times and semblance places constraints on the lahar's dynamics, including detection of an initial flow pulse that traveled from 2 to 12 km at an average speed of 38 m/s. Subsequently, the lahar signal evolved to a relatively stationary infrasonic tremor located 10 to 12 km from the vent and adjacent to a topographic notch, through which sound may have preferentially diffracted toward the recording site. This study demonstrates the powerful capabilities of infrasound arrays for lahar study and suggests their potential application for future hazard monitoring. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940447031&doi=10.1002%2f2015GL065024&partnerID=40&md5=653d41e3e492b49b29a4cbcdd96144c9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8247
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Geosciences, Boise State University, Boise, ID, United States
Recommended Citation:
Johnson J.B.,Palma J.L.. Lahar infrasound associated with Volcán Villarrica's 3 March 2015 eruption[J]. Geophysical Research Letters,2015-01-01,42(15).