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Study reveals how to improve natural gas production in shale 新闻
来源平台:EurekAlert. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:1/0  |  提交时间:2020/11/20
'Cell pores' discovery gives hope to millions of brain and spinal cord injury patients 新闻
来源平台:EurekAlert. 发布日期:2020
作者:  admin
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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.


  
INDUCED SEISMICITY Fluid-induced aseismic fault slip outpaces pore-fluid migration 期刊论文
SCIENCE, 2019, 364 (6439) : 464-+
作者:  Bhattacharya, Pathikrit;  Viesca, Robert C.
收藏  |  浏览/下载:2/0  |  提交时间:2019/11/27
Direct observations of rock moisture, a hidden component of the hydrologic cycle 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (11) : 2664-2669
作者:  Rempe, Daniella M.;  Dietrich, William E.
收藏  |  浏览/下载:7/0  |  提交时间:2019/11/27
Critical Zone  rock moisture  deep vadose zone  water budget  evapotranspiration