DOI: 10.1002/2015GL063924
论文题名: New observations of displacement steps associated with volcano seismic long-period events, constrained by step table experiments
作者: Thun J. ; Lokmer I. ; Bean C.J.
刊名: Geophysical Research Letters
ISSN: 0094-9449
EISSN: 1944-9180
出版年: 2015
卷: 42, 期: 10 起始页码: 3855
结束页码: 3862
语种: 英语
英文关键词: Etna Volcano
; lab experiments
; LP activity
; static displacement
; Turrialba Volcano
Scopus关键词: Median filters
; Seismology
; Displacement components
; Etna volcanos
; Ground deformations
; Laboratory experiments
; Long-period events
; Material failures
; Static displacement
; Volcanic eruptions
; Volcanoes
; deformation mechanism
; displacement
; experimental design
; ground movement
; hazard assessment
; laboratory method
; long-term change
; seismic noise
; seismogram
; static response
; volcanic eruption
; Cartago
; Catania [Sicily]
; Costa Rica
; Etna
; Italy
; Sicily
; Turrialba
英文摘要: Long-period (LP) volcano seismic events often precede volcanic eruptions and are viewed with considerable interest in hazard assessment. They are usually thought to be associated with resonating fluid-filled conduits although alternative models involving material failure have recently been proposed. Through recent field experiments, we uncovered a step-like displacement component associated with some LP events, outside the spectral range of the typically narrow-band analysis for this kind of event. Bespoke laboratory experiments with step tables show that steps of the order of a few micrometers can be extracted from seismograms, where long-period noise is estimated and removed with moving median filters. Using these constraints, we observe step-like ground deformation in LP recordings near the summits of Turrialba and Etna Volcanoes. This represents a previously unobserved static component in the source time history of LP events, with implications for the underlying source process. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931564330&doi=10.1002%2f2015GL063924&partnerID=40&md5=4fc4a72c9a97a6160f733632073cc984
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9064
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: Seismology Laboratory, School of Geological Sciences, University College Dublin, Dublin, Ireland
Recommended Citation:
Thun J.,Lokmer I.,Bean C.J.. New observations of displacement steps associated with volcano seismic long-period events, constrained by step table experiments[J]. Geophysical Research Letters,2015-01-01,42(10).