Monitoring Changes in Seismic Velocity Related to Magmatism at Augustine and Veniaminof Volcanoes, Alaska
监测与阿拉斯加奥古斯丁和韦尼亚米诺夫火山岩浆作用相关的地震速度变化
基本信息
- 批准号:1449282
- 负责人:
- 金额:$ 9.56万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2015
- 资助国家:美国
- 起止时间:2015-01-01 至 2018-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This study will focus on improving the detection of precursory activity prior to active volcanism at both Augustine and Veniaminof volcanoes, Alaska. The researchers in the study will carry out seismic interferometry using ambient noise recorded at these volcanoes, specifically pre- through post-eruption for the 2002 through 2013 eruptions at Veniaminof and the 2006 Augustine eruption. This method is able to resolve small temporal changes in seismic velocity between station pairs, thus allowing the detection of subtle changes in the volcano over time. A natural extension of this work will include spatial mapping of these temporal changes in seismic velocity from pre- through post-eruption at Augustine volcano. Spatial mapping of these changes in seismic velocity at Augustine will help visualize pre- through post-eruptive structural changes at the volcano. Some important questions related to magma storage and transport at Augustine will be examined including if an inflating shallow magma reservoir exists, and at what point in the eruptive cycle does the shallow magma reservoir inflate. The work will look for indications of magmatic fluid from a shallow magma reservoir, and perturbations to the upper crustal velocity structure serving as an early indicator of eruption. At Veniaminof, they will examine questions related to the progression of magmatic activity leading to eruption, including if there are indications of an inflating magma reservoir prior to eruption, and if inflation of the magma reservoir is followed by the migration of magmatic fluids to shallow depths. Augustine volcano is one of the most active volcanoes in the Cook Inlet and Veniaminof volcano is one of the most active volcanoes in the Aleutian Arc. As such, both volcanoes pose major hazards to local people, air traffic, oil production facilities, and shipping activity. This study will improve our ability to detect precursory activity leading to active volcanism at both Augustine and Veniaminof volcanoes. The proposed study will also fund an early career female scientist, Dr. Ninfa Bennington, at the University of Wisconsin, Madison. The researchers will create an online website that displays near-real time changes in seismic velocity for both Augustine and Veniaminof volcanoes. This website will be available to both to the general public as an educational resource and to the AVO as a near-real time monitoring tool to assess volcanic activity at Augustine and Veniaminof volcanoes.
这项研究的重点将是改进对阿拉斯加奥古斯丁和维尼亚明火山活火山活动前的前兆活动的探测。研究中的研究人员将利用这些火山记录的环境噪声进行地震干涉测量,特别是2002年至2013年维尼亚米诺夫火山喷发和2006年奥古斯丁火山喷发的喷发前至喷发后。这种方法能够解决台站对之间地震速度的微小时间变化,从而能够检测到火山随时间的细微变化。这项工作的自然延伸将包括绘制从奥古斯丁火山喷发前到喷发后地震速度的这些时间变化的空间地图。在奥古斯丁绘制这些地震速度变化的空间地图将有助于可视化火山喷发前到喷发后的结构变化。与奥古斯丁岩浆储存和运输有关的一些重要问题将被研究,包括是否存在膨胀的浅层岩浆库,以及浅层岩浆库在喷发循环中的哪个时间点膨胀。这项工作将寻找来自浅层岩浆库的岩浆流体迹象,以及作为喷发早期指标的对地壳上部速度结构的扰动。在维尼亚米诺夫,他们将研究与导致喷发的岩浆活动进程有关的问题,包括是否有迹象表明喷发前岩浆库膨胀,以及岩浆库膨胀之后是否伴随着岩浆流体向浅层的迁移。奥古斯丁火山是库克湾最活跃的火山之一,维尼亚米诺夫火山是阿留申弧区最活跃的火山之一。因此,这两座火山都对当地人民、空中交通、石油生产设施和航运活动构成了重大威胁。这项研究将提高我们在奥古斯丁和维尼明诺夫火山探测导致活火山活动的前兆活动的能力。这项拟议的研究还将资助威斯康星大学麦迪逊分校职业生涯早期的女科学家宁法·本宁顿博士。研究人员将创建一个在线网站,显示奥古斯丁和维尼米诺夫火山地震速度的近实时变化。该网站将作为教育资源向公众开放,向AVO开放,作为评估奥古斯丁和维尼亚明火山活动的近乎实时的监测工具。
项目成果
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Ninfa Bennington其他文献
Triggering the 2022 eruption of Mauna Loa
引发 2022 年冒纳罗亚火山喷发
- DOI:
10.1038/s41467-024-52881-7 - 发表时间:
2024-11-12 - 期刊:
- 影响因子:15.700
- 作者:
Kendra J. Lynn;Drew T. Downs;Frank A. Trusdell;Penny E. Wieser;Berenise Rangel;Baylee McDade;Alicia J. Hotovec-Ellis;Ninfa Bennington;Kyle R. Anderson;Dawn C. S. Ruth;Charlotte L. DeVitre;Andria P. Ellis;Patricia A. Nadeau;Laura Clor;Peter Kelly;Peter J. Dotray;Jefferson C. Chang - 通讯作者:
Jefferson C. Chang
Ninfa Bennington的其他文献
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