Three Compliance Instruments for Axial Volcano to Observe Long Term Evolution of the Magma Chamber and in Support of OOI Observations
用于轴状火山观测岩浆室长期演化并支持 OOI 观测的三种顺应性仪器
基本信息
- 批准号:1924024
- 负责人:
- 金额:$ 62.78万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2019
- 资助国家:美国
- 起止时间:2019-10-01 至 2023-09-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Despite decades of observations, how magma migrates and is stored within volcanoes remains poorly understood because there are few means to continuously monitor changes within magma chambers beneath volcanoes. Such measurements are needed to understand when and how the gradual emplacement of magma finally triggers an eruption. The instrumentation developed will provide the potential to monitor changes in the magma content continuously beneath undersea volcanoes and thereby provide a better understanding of volcano processes that can also be applied to volcanos on land that pose a major hazard to millions of people.Axial Volcano, a large, very active undersea volcano offshore the US West Coast is currently monitored using sensors that transmit data through the NSF supported Ocean Observatories Initiative cable to shore. Sensors on these cables measured changes in the compliance of seafloor preceding and following an eruption in 2015 associated with changes in the magma chamber, but the noise level of these sensors limited the sensitivity of the observations and the observation period to the winter months when the compliance signal was larger. New compliance sensors with better sensitivity and a lower noise level will be constructed using more optimal sensors and placed on the seafloor beneath large shields that protect the sensors from noise from ocean currents. Compliance, a measure the deformation of the seafloor under the loading of long period ocean waves, depends on the elastic properties of the underlying Earth and thereby to the fraction of magma within the magma chamber. The current shielding developed will also have applicability for reducing the noise levels for the horizontal components of broadband seismometers installed on the seafloor. Ocean bottom seismometers are critical to understanding many Earth processes, but the high noise levels due to ocean floor currents limits the types and quality of observations that can be made.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
尽管经过几十年的观察,岩浆是如何在火山中迁移和储存的,人们仍然知之甚少,因为几乎没有办法持续监测火山下岩浆房的变化。这样的测量对于了解岩浆的逐渐就位最终触发喷发的时间和方式是必要的。开发的仪器将提供持续监测海底火山岩浆含量变化的潜力,从而提供对火山过程的更好理解,也可以应用于对数百万人构成重大威胁的陆地火山。轴向火山是美国西海岸近海的一个非常活跃的大型海底火山,目前正在使用传感器进行监测,这些传感器通过美国国家科学基金会支持的海洋观测倡议电缆将数据传输到岸上。这些电缆上的传感器测量了2015年火山喷发前后海底顺应性的变化,这些变化与岩浆室的变化有关,但这些传感器的噪声水平限制了观测的灵敏度,并且观测周期仅限于顺应性信号较大的冬季月份。采用更优的传感器,将建造灵敏度更高、噪音水平更低的新型合规传感器,并将其放置在海底的大屏蔽层下,以保护传感器免受洋流的噪音影响。顺应性是衡量海底在长周期海浪作用下变形的一种方法,它取决于地下地球的弹性特性,从而取决于岩浆房中岩浆的比例。目前开发的屏蔽也将适用于降低安装在海底的宽带地震仪水平组件的噪声水平。海底地震仪对了解许多地球过程至关重要,但由于海底洋流产生的高噪声水平限制了观测的类型和质量。该奖项反映了美国国家科学基金会的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Spahr Webb其他文献
Spahr Webb的其他文献
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{{ truncateString('Spahr Webb', 18)}}的其他基金
Collaborative Research: Near-Trench Community Geodetic Experiment
合作研究:近海沟群落大地测量实验
- 批准号:
2232644 - 财政年份:2023
- 资助金额:
$ 62.78万 - 项目类别:
Continuing Grant
Collaborative Research: Vertical seafloor geodesy to accurately image slow slip events in a noisy ocean environment
合作研究:垂直海底大地测量以准确成像嘈杂海洋环境中的慢滑事件
- 批准号:
2140657 - 财政年份:2022
- 资助金额:
$ 62.78万 - 项目类别:
Continuing Grant
Validating Pressure Gauges for Seafloor Seismology and Geodesy
验证海底地震学和大地测量学压力表
- 批准号:
1933196 - 财政年份:2019
- 资助金额:
$ 62.78万 - 项目类别:
Standard Grant
Collaborative Research: Along Strike Variation in Shallow, Offshore Strain Accumulation and Slow Slip at Hikurangi Subduction Margin, New Zealand
合作研究:新西兰 Hikurangi 俯冲边缘浅层近海应变积累和慢滑移的沿走向变化
- 批准号:
1754929 - 财政年份:2018
- 资助金额:
$ 62.78万 - 项目类别:
Continuing Grant
Collaborative Research: Measuring strain along the Aleutian subduction zone trench to better constrain seismic and tsunami hazard
合作研究:测量阿留申俯冲带海沟沿线的应变,以更好地限制地震和海啸灾害
- 批准号:
1656413 - 财政年份:2017
- 资助金额:
$ 62.78万 - 项目类别:
Continuing Grant
Exploring the absolute pressure gauge data from the Cascadia Initiative OBS deployment for transient changes in seafloor elevation
探索卡斯卡迪亚倡议 OBS 部署的绝对压力计数据,以了解海底高度的瞬态变化
- 批准号:
1459691 - 财政年份:2015
- 资助金额:
$ 62.78万 - 项目类别:
Standard Grant
Development and Testing of Pressure Gradient Sensors to Improve Shallow Seafloor Seismic Observations
开发和测试压力梯度传感器以改善浅海海底地震观测
- 批准号:
1334746 - 财政年份:2013
- 资助金额:
$ 62.78万 - 项目类别:
Standard Grant
Collaborative Research: Hikurangi Ocean Bottom Investigation of Tremor and Slow Slip (HOBITSS)
合作研究:Hikurangi 海底地震和慢滑移调查 (HOBITSS)
- 批准号:
1333311 - 财政年份:2013
- 资助金额:
$ 62.78万 - 项目类别:
Continuing Grant
Collaborative Research: Permanent seafloor benchmarks for geodetic measurements of horizontal and vertical plate motion
合作研究:水平和垂直板块运动大地测量的永久海底基准
- 批准号:
1155006 - 财政年份:2012
- 资助金额:
$ 62.78万 - 项目类别:
Standard Grant
A Study of Continental Margins Amphibious Seismometry
大陆边缘两栖地震测量研究
- 批准号:
1154795 - 财政年份:2012
- 资助金额:
$ 62.78万 - 项目类别:
Standard Grant
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