Architecture of the Subduction to Strike-Slip Transition in New Zealand
新西兰俯冲到走滑过渡的结构
基本信息
- 批准号:1756075
- 负责人:
- 金额:$ 27.51万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-03-15 至 2024-02-29
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
In recent years, seismologists have come to recognize that many large earthquakes that occur involve slip on multiple faults. This phenomenon means that estimates of earthquake hazard based on the assumption that faults fail individually can underestimate the size of the largest possible earthquake in a region, and in turn the level of seismic hazard. The November 14, 2016 magnitude 7.8 Kaikoura earthquake in the northern South Island, New Zealand, stands out as one of the most complex earthquakes known, with rupture of the ground surface observed on more than 20 faults. The earthquake was followed by tens of thousands of aftershocks, and it also triggered a number of what are called "slow slip events" - fault slip occurring over days to months instead of seconds to minutes like most earthquakes. The Kaikoura earthquake is the latest in a series of damaging earthquakes in the northern part of the South Island in New Zealand that have struck in this decade. This project will examine several key questions related to the complicated geologic evolution of this region. This project will take advantage of data and results from a broad range of studies that have been carried out over the past two decades. It will also utilize seismic data from temporary arrays that were deployed to record aftershock and were operated, in part, with support of RAPID funding from NSF. The tasks of this project are to image the three-dimensional seismic velocity and attenuation structure, to relocate earthquakes that occurred in the region with high-precision, and to determine the fault slip geometry using the aftershock locations. This work will contribute to our understanding of how multiple-fault failure occurs in large earthquakes, thereby contributing to improving seismic hazard estimation. The work will be carried out in close collaboration with New Zealand scientists from GNS Science and Victoria University of Wellington. In addition, as part of the broader impacts, this project will mentor a female postdoctoral scholar.The November 14, 2016 Mw 7.8 Kaikoura earthquake in the northern South Island, New Zealand, stands out as one of the most complex seismic events known. Surface rupture has been mapped on at least 21 faults. Post-seismic slow slip events were triggered over a broad area, including substantial slip on the South Island megathrust underlying the activated crustal faults. The Kaikoura earthquake is the latest in a series of damaging earthquakes in the Canterbury and Marlborough regions of the South Island that have struck in this decade, starting with the Darfield and Christchurch earthquakes of 2010 and 2011, continuing with the Seddon and Lake Grassmere earthquakes of 2013, and culminating in the 2016 Kaikoura earthquake. We note that the Mw 7.1 Darfield earthquake was also a complex, multi-fault rupture.This project will examine several hypotheses related to the complex tectonics of this region of transition from subduction to strike-slip. The proposed study will take advantage of data and results from a broad range of studies that have been carried out in this region over the past two decades, and utilize data from temporary aftershock arrays supported in part by NSF through RAPID awards. The main analysis tools are seismic velocity and attenuation tomography that incorporate recent and planned methodological developments, high-precision earthquake relocation, and focal mechanism analysis. The work will be carried out in close collaboration with New Zealand scientists from GNS Science and Victoria University of Wellington and will engage a female postdoctoral scholar in the data analysis and interpretation.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.
近年来,地震学家已经认识到,许多发生的大地震涉及多个断层的滑动。这一现象意味着,基于单个断层失效假设的地震危险性估计可能会低估一个地区可能发生的最大地震的规模,进而低估地震危险性的水平。2016年11月14日发生在新西兰南岛北部的凯库拉7.8级地震是已知最复杂的地震之一,在20多个断层上观测到地表破裂。地震之后发生了成千上万次余震,它还引发了一些所谓的“慢滑事件”——断层滑动发生在几天到几个月的时间里,而不是像大多数地震那样在几秒钟到几分钟内发生。凯库拉地震是近十年来新西兰南岛北部发生的一系列破坏性地震中最新的一次。该项目将研究与该地区复杂地质演化有关的几个关键问题。该项目将利用过去二十年来开展的广泛研究的数据和结果。它还将利用临时阵列的地震数据,这些阵列用于记录余震,并在NSF的RAPID资助下部分运行。该项目的任务是成像三维地震速度和衰减结构,高精度地重新定位该地区发生的地震,并利用余震位置确定断层滑动几何形状。这项工作将有助于我们了解在大地震中如何发生多断层破坏,从而有助于改进地震危险性估计。这项工作将与新西兰GNS科学公司和惠灵顿维多利亚大学的科学家密切合作进行。此外,作为更广泛影响的一部分,该项目将指导一名女性博士后学者。2016年11月14日发生在新西兰南岛北部凯库拉的里氏7.8级地震是已知最复杂的地震事件之一。地表破裂已经在至少21个断层上被绘制出来。地震后的慢滑事件在大范围内被触发,包括南岛巨型逆冲断层下的大量滑动。凯库拉地震是近十年来南岛坎特伯雷和马尔伯勒地区发生的一系列破坏性地震中最新的一次,从2010年和2011年的达菲尔德和克赖斯特彻奇地震开始,接着是2013年的塞登和格拉斯米尔湖地震,最后是2016年的凯库拉地震。我们注意到,达菲尔德7.1级地震也是一次复杂的多断层破裂。本项目将考察与该地区从俯冲向走滑过渡的复杂构造有关的几个假设。拟议的研究将利用过去二十年来在该地区开展的广泛研究的数据和结果,并利用由美国国家科学基金会通过RAPID奖部分支持的临时余震阵列的数据。主要的分析工具是地震速度和衰减层析成像,结合了最近和计划的方法发展,高精度地震定位和震源机制分析。这项工作将与新西兰GNS科学和惠灵顿维多利亚大学的科学家密切合作,并将聘请一名女性博士后学者进行数据分析和解释。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(3)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Fracturing and pore-fluid distribution in the Marlborough region, New Zealand from body-wave tomography: Implications for regional understanding of the Kaikōura area
体波断层扫描新西兰马尔堡地区的压裂和孔隙流体分布:对凯库拉地区区域了解的启示
- DOI:10.1016/j.epsl.2022.117666
- 发表时间:2022
- 期刊:
- 影响因子:5.3
- 作者:Heath, Benjamin A.;Eberhart-Phillips, Donna;Lanza, Federica;Thurber, Clifford;Savage, Martha K.;Okada, Tomomi;Matsumoto, Satoshi;Iio, Yoshihisa;Bannister, Stephen
- 通讯作者:Bannister, Stephen
Spatial and temporal stress field changes in the focal area of the 2016 Kaikōura earthquake, New Zealand: A multi-fault process interpretation
2016年新西兰凯库拉地震震源区的时空应力场变化:多断层过程解释
- DOI:10.1016/j.tecto.2022.229390
- 发表时间:2022
- 期刊:
- 影响因子:2.9
- 作者:Matsuno, Miu;Tagami, Ayaka;Okada, Tomomi;Matsumoto, Satoshi;Kawamura, Yuta;Iio, Yoshihisa;Sato, Tadashi;Nakayama, Takashi;Hirahara, Satoshi;Bannister, Stephen
- 通讯作者:Bannister, Stephen
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Clifford Thurber其他文献
Clifford Thurber的其他文献
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{{ truncateString('Clifford Thurber', 18)}}的其他基金
Applications of double-difference seismic attenuation tomography
双差地震衰减层析成像的应用
- 批准号:
2042919 - 财政年份:2021
- 资助金额:
$ 27.51万 - 项目类别:
Standard Grant
Double-difference attenuation tomography method and pilot applications
双差衰减层析成像方法及试点应用
- 批准号:
1724685 - 财政年份:2017
- 资助金额:
$ 27.51万 - 项目类别:
Standard Grant
Rapid deployment of seismic instruments around Wellington, NZ, following the November 13, 2016, magnitude 7.8 Kaikoura earthquake
2016 年 11 月 13 日凯库拉 7.8 级地震后,在新西兰惠灵顿周围快速部署地震仪器
- 批准号:
1717119 - 财政年份:2016
- 资助金额:
$ 27.51万 - 项目类别:
Standard Grant
Collaborative Research: Magnetotelluric and Seismic Investigations of the Distribution of Magmatic and Hydrous Fluids Beneath Yellowstone
合作研究:黄石地下岩浆和含水流体分布的大地电磁和地震调查
- 批准号:
1460061 - 财政年份:2016
- 资助金额:
$ 27.51万 - 项目类别:
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Collaborative Research: Magnetotelluric and seismic investigation of arc melt generation, delivery, and storage beneath Okmok volcano
合作研究:奥克莫克火山下方电弧熔体产生、输送和储存的大地电磁和地震调查
- 批准号:
1456749 - 财政年份:2015
- 资助金额:
$ 27.51万 - 项目类别:
Continuing Grant
Collaborative Research: Simultaneous Imaging of the Megathrust and Volcanic Systems in the Aleutian Islands Using Hybrid Mini Seismic Arrays
合作研究:使用混合微型地震阵列对阿留申群岛的巨型逆冲断层和火山系统进行同步成像
- 批准号:
1358619 - 财政年份:2014
- 资助金额:
$ 27.51万 - 项目类别:
Continuing Grant
Assessing the causes of slab seismicity through dehydration, temperature and strain: A global approach
通过脱水、温度和应变评估板片地震活动的原因:全球方法
- 批准号:
1246955 - 财政年份:2013
- 资助金额:
$ 27.51万 - 项目类别:
Standard Grant
Relative velocity changes using ambient seismic noise at Okmok and Redoubt volcanoes, Alaska
使用阿拉斯加奥克莫克火山和堡垒火山周围地震噪声的相对速度变化
- 批准号:
1246975 - 财政年份:2013
- 资助金额:
$ 27.51万 - 项目类别:
Standard Grant
Observations of a newly discovered fault: Tomography, locations and source mechanisms for aftershocks of the M7.1 Darfield, New Zealand earthquake
对新发现断层的观测:新西兰达菲尔德 M7.1 地震余震的断层扫描、位置和震源机制
- 批准号:
1141983 - 财政年份:2012
- 资助金额:
$ 27.51万 - 项目类别:
Standard Grant
Coordinated Deployment of Seismic Instruments to Record Aftershocks of the September 2010 New Zealand Earthquake
协调部署地震仪器记录 2010 年 9 月新西兰地震的余震
- 批准号:
1102767 - 财政年份:2011
- 资助金额:
$ 27.51万 - 项目类别:
Standard Grant
相似国自然基金
热带气旋引起的潜沉(subduction)、浮露(obduction)率及其年际、年代际变化
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- 项目类别:青年科学基金项目
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