| DOI: | 10.1002/2015GL065680
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| 论文题名: | Kilometer-scale Kaiser effect identified in Krafla volcano, Iceland |
| 作者: | Heimisson E.R.; Einarsson P.; Sigmundsson F.; Brandsdõttir B.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8560
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| EISSN: | 1944-8291
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| 出版年: | 2015
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| 卷: | 42, 期:19 | | 起始页码: | 7958
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| 结束页码: | 7965
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| 语种: | 英语
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| 英文关键词: | Eruption forecasting
; Kaiser effect
; Krafla rifting episode
; Volcano deformation
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| Scopus关键词: | Deformation
; Geometry
; Seismology
; Elastic half space
; Kaiser effect
; Krafla caldera
; Krafla rifting episode
; Small-scale experiment
; Spherical points
; Time dependent
; Volcanic deformation
; Volcanoes
; caldera
; deflation
; deformation mechanism
; fissure
; forecasting method
; geodetic datum
; Kaiser effect
; magma assimilation
; point source
; rifting
; seismic data
; seismicity
; spatiotemporal analysis
; volcanic eruption
; volume change
; Iceland
; Krafla
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| 英文摘要: | The Krafla rifting episode in 1975-1984, consisted of around 20 inflation-deflation events within the Krafla caldera, where magma accumulated during inflation periods and was intruded into the transecting fissure swarm during brief periods of deflation. We reanalyze geodetic and seismic data from the rifting episode and perform a time-dependent inversion of a leveling time series for a spherical point source in an elastic half-space. Using the volume change as a proxy for stress shows that during inflation periods the seismicity rate remains low until the maximum inflation of previous cycles is exceeded thus exhibiting the Kaiser effect. Our observations demonstrate that this phenomenon, commonly observed in small-scale experiments, is also produced in kilometer-scale volcanic deformation. This behavior sheds new light on the relationship between deformation and seismicity of a deforming volcano. As a consequence of the Kaiser effect, a volcano may inflate rapidly without significant changes in seismicity rate. Key Points Deforming volcano exhibits kilometer-scale Kaiser effect A volcano may not show abnormal seismic activity until it is very close to an eruption The Kaiser effect should be considered for eruption forecasting and hazard assessment © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84947042949&doi=10.1002%2f2015GL065680&partnerID=40&md5=f6289bfef3ad1bf89071d71d5639385b
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8176
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| 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: | Nordic Volcanological Center, Institute of Earth Sciences, University of Iceland, Reykjavik, Iceland
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| Recommended Citation: | |
Heimisson E.R.,Einarsson P.,Sigmundsson F.,et al. Kilometer-scale Kaiser effect identified in Krafla volcano, Iceland[J]. Geophysical Research Letters,2015-01-01,42(19).
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