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研究表明岩浆房可在短时间内迅速形成 快报文章
地球科学快报,2022年第19期
作者:  刘学
Microsoft Word(30Kb)  |  收藏  |  浏览/下载:639/0  |  提交时间:2022/10/10
magma  Skaergaard intrusion  
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.


  
An Integrated Geophysical Approach to Track Magma Intrusion: The 2018 Christmas Eve Eruption at Mount Etna 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (14) : 8009-8017
作者:  Cannavo, F.;  Sciotto, M.;  Cannata, A.;  Di Grazia, G.
收藏  |  浏览/下载:16/0  |  提交时间:2019/11/27
volcano modeling  tracking magma intrusion  dike and volcano plumbing system interaction  
Magma Ascent and Eruption Triggered by Cratering on the Moon 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2018, 45 (13) : 6408-6416
作者:  Michaut, Chloe;  Pinel, Virginie
收藏  |  浏览/下载:5/0  |  提交时间:2019/04/09
magma intrusion  Moon  impact craters  floor-fractured crater  mare-filled crater  magma ascent