Deep long-period earthquakes generated by second boiling beneath Mauna Kea volcano

doi:10.1126/science.aba4798

GSTDTAP > 气候变化

DOI	10.1126/science.aba4798
	Deep long-period earthquakes generated by second boiling beneath Mauna Kea volcano
	Aaron G. Wech; Weston A. Thelen; Amanda M. Thomas
	2020-05-15
发表期刊	Science
出版年	2020
英文摘要	Earthquakes near volcanoes are often a warning sign of a future eruption. However, deep long-period earthquakes (DLPs) are a special type of seismicity tied most often to quiescent volcanoes. Wech et al. found more than a million of these DLPs under the inactive Mauna Kea volcano in Hawai'i over the past 19 years (see the Perspective by Matoza). Analysis of this large number of observations allowed the authors to conclude that the DLPs were connected to a deep, cooling magma body. Deep gas releases triggered by minerals crystallizing in the deep magma through the “second boiling” process may open cracks, triggering the DLPs. Science , this issue p. [775][1]; see also p. [708][2] Deep long-period earthquakes (DLPs) are an enigmatic type of volcanic seismicity that sometimes precedes eruptions but mostly occurs at quiescent volcanoes. These earthquakes are depleted in high-frequency content and typically occur near the base of the crust. We observed a near-periodic, long-lived sequence of more than one million DLPs in the past 19 years beneath the dormant postshield Mauna Kea volcano in Hawaiʻi. We argue that this DLP sequence was caused by repeated pressurization of volatiles exsolved through crystallization of cooling magma stalled beneath the crust. This “second boiling” of magma is a well-known process but has not previously been linked to DLP activity. Our observations suggest that, rather than portending eruptions, global DLP activity may more commonly be indicative of stagnant, cooling magma. [1]: /lookup/doi/10.1126/science.aba4798 [2]: /lookup/doi/10.1126/science.abc2452
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/267723
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Aaron G. Wech,Weston A. Thelen,Amanda M. Thomas. Deep long-period earthquakes generated by second boiling beneath Mauna Kea volcano[J]. Science,2020.
APA	Aaron G. Wech,Weston A. Thelen,&Amanda M. Thomas.(2020).Deep long-period earthquakes generated by second boiling beneath Mauna Kea volcano.Science.
MLA	Aaron G. Wech,et al."Deep long-period earthquakes generated by second boiling beneath Mauna Kea volcano".Science (2020).