| 项目编号: | 1449282
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| 项目名称: | Monitoring Changes in Seismic Velocity Related to Magmatism at Augustine and Veniaminof Volcanoes, Alaska |
| 作者: | Ninfa Bennington
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| 承担单位: | University of Wisconsin-Madison
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| 批准年: | 2014
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| 开始日期: | 2015-01-01
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| 结束日期: | 2017-12-31
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| 资助金额: | USD95636
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Earth Sciences
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| 英文关键词: | augustine
; veniaminof volcano
; seismic velocity
; post-eruption
; study
; veniaminof
; eruption
; volcano
; augustine volcano
; small temporal change
; post-eruptive structural change
; shallow magma reservoir
; augustine eruption
; upper crustal velocity structure
; temporal change
; subtle change
; near-real time change
|
| 英文摘要: | 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. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95293
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Ninfa Bennington. Monitoring Changes in Seismic Velocity Related to Magmatism at Augustine and Veniaminof Volcanoes, Alaska. 2014-01-01.
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