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Spatiotemporal Seismic Structure Variations Associated With the 2018 Kilauea Eruption Based on Temporary Dense Geophone Arrays 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (9)
作者:  Wu, Sin-Mei;  Lin, Fan-Chi;  Farrell, Jamie;  Shiro, Brian;  Karlstrom, Leif;  Okubo, Paul;  Koper, Keith
收藏  |  浏览/下载:9/0  |  提交时间:2020/07/02
Kilauea volcano  magma pressurization  summit collapse  seismic interferometry  dike intrusion  
Extreme rainfall triggered the 2018 rift eruption at Kilauea Volcano 期刊论文
NATURE, 2020, 580 (7804) : 491-+
作者:  Cloutier, Richard;  Clement, Alice M.;  Lee, Michael S. Y.;  Noel, Roxanne;  Bechard, Isabelle;  Roy, Vincent;  Long, John A.
收藏  |  浏览/下载:33/0  |  提交时间:2020/05/13

The May 2018 rift intrusion and eruption of Kilauea Volcano, Hawai'  i, represented one of its most extraordinary eruptive sequences in at least 200 years, yet the trigger mechanism remains elusive(1). The event was preceded by several months of anomalously high precipitation. It has been proposed that rainfall can modulate shallow volcanic activity(2,3), but it remains unknown whether it can have impacts at the greater depths associated with magma transport. Here we show that immediately before and during the eruption, infiltration of rainfall into Kilauea Volcano'  s subsurface increased pore pressure at depths of 1 to 3 kilometres by 0.1 to 1 kilopascals, to its highest pressure in almost 50 years. We propose that weakening and mechanical failure of the edifice was driven by changes in pore pressure within the rift zone, prompting opportunistic dyke intrusion and ultimately facilitating the eruption. A precipitation-induced eruption trigger is consistent with the lack of precursory summit inflation, showing that this intrusion-unlike others-was not caused by the forceful intrusion of new magma into the rift zone. Moreover, statistical analysis of historic eruption occurrence suggests that rainfall patterns contribute substantially to the timing and frequency of Kilauea'  s eruptions and intrusions. Thus, volcanic activity can be modulated by extreme rainfall triggering edifice rock failure-a factor that should be considered when assessing volcanic hazards. Notably, the increasingly extreme weather patterns associated with ongoing anthropogenic climate change could increase the potential for rainfall-triggered volcanic phenomena worldwide.


Immediately before and during the eruption of Ki & x304  lauea Volcano in May 2018, anomalously high rainfall increased the pore pressure in the subsurface to its highest level in 50 years, causing weakening and mechanical failure of the edifice.


  
Temporal Variations in Scrubbing of Magmatic Gases at the Summit of Kilauea Volcano, Hawai'i 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019
作者:  Hurwitz, Shaul;  Anderson, Kyle R.
收藏  |  浏览/下载:11/0  |  提交时间:2020/02/17
Kilauea  scrubbing  volatiles  degassing  hydrothermal  groundwater  
Post-Collapse Gravity Increase at the Summit of Kilauea Volcano, HawaiModified Letter Turned Commai 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019
作者:  Poland, Michael P.;  de Zeeuw-van Dalfsen, Elske;  Bagnardi, Marco;  Johanson, Ingrid A.
收藏  |  浏览/下载:25/0  |  提交时间:2020/02/17
Kilauea  microgravity  magma plumbing system  magma supply  magma storage  volcano geodesy  
Anatomy of a Caldera Collapse: Kilauea 2018 Summit Seismicity Sequence in High Resolution 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019
作者:  Shelly, David R.;  Thelen, Weston A.
收藏  |  浏览/下载:5/0  |  提交时间:2020/02/17
Kilauea Volcano  2018 eruption  high-resolution seismicity  caldera collapse  
Mechanics of Inflationary Deformation During Caldera Collapse: Evidence From the 2018 Kilauea Eruption 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019
作者:  Segall, Paul;  Anderson, Kyle R.;  Johanson, Ingrid;  Miklius, Asta
收藏  |  浏览/下载:4/0  |  提交时间:2019/11/27
caldera collapse  faulting  Kilauea  
The Rupture Process of the 2018 M-w 6.9 Hawai'i Earthquake as Imaged by a Genetic Algorithm-Based Back-Projection Technique 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (5) : 2467-2474
作者:  Kehoe, H. L.;  Kiser, E. D.;  Okubo, P. G.
收藏  |  浏览/下载:3/0  |  提交时间:2019/11/26
seismology  back projection  genetic algorithm  Hawaii  Kilauea  rupture  
Continuous Gravity and Tilt Reveal Anomalous Pressure and Density Changes Associated With Gas Pistoning Within the Summit Lava Lake of Klauea Volcano, Hawai'i 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2018, 45 (5) : 2319-2327
作者:  Poland, Michael P.;  Carbone, Daniele
收藏  |  浏览/下载:4/0  |  提交时间:2019/04/09
Kilauea  lava lake  deformation  gravity change  pressure  geodesy