Fine Structure of Fault Zones from Modeling High-frequency Body-wave Waveforms of Aftershocks
通过模拟余震高频体波波形了解断裂带的精细结构
基本信息
- 批准号:0609969
- 负责人:
- 金额:$ 15.5万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2006
- 资助国家:美国
- 起止时间:2006-09-01 至 2010-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Earthquakes are the result of rapid movement of crustalblocks on faults, which are marked by a narrow fault zone(FZ) with a width of several hundred meters. Mostearthquake rupture models, including the asperity andstick-slip paradigms, suggest that FZ structure (geometricaland material properties) controls earthquake ruptureinitiation, propagation, and termination. However,determining FZ structure at seismogenic depths whereearthquakes nucleate and the majority of slip occurs hasbeen shown to be extremely difficult. In this project,seismologists at Saint Louis University use high-frequencybody-wave waveforms from aftershocks near the FZ todetermine fine-scale. Waveform characteristicsenables them to design a new strategy in which the FZ widthand velocities are determined separately, thus eliminatingthe trade-off between the two. Furthermore, by using FZreflected waves, they can pinpoint the locations in the FZwhere they have obtained FZ width and velocity parameters.This gives them a unprecedented high depth resolution of FZstructure. In addition, they are able to relocateaftershocks with an accuracy of a few tens of metersrelative to the FZ boundaries. They plan to apply themethod to data sets of various fault zones in California,including the Landers, Hector Mine, San Jacinto, and SanAndreas Fault at Parkfield to determine FZ parameters(strike, width, velocity and density drops, and Q) andpossible temporary variations. Broader Impacts: The information obtained is crucialto developing models of the earthquake source. Experiencegained in this study will help design future FZ seismicexperiments and the methodologies developed can be easilyapplied to other regions and data sets, such as those fromthe on-going USArray.
地震是地壳块体在断层上快速运动的结果,断层以宽度为几百米的狭窄断层带(FZ)为标志。 大多数地震破裂模型,包括粗糙体和粘滑范例,表明FZ结构(几何和材料属性)控制地震破裂的开始,传播和终止。 然而,确定FZ结构的孕震深度,地震成核和大多数滑动发生已被证明是极其困难的。 在这个项目中,圣刘易斯大学的地震学家们使用FZ附近余震的高频体波波形来确定精细尺度。 波形特征使他们能够设计一种新的策略,其中FZ宽度和速度分别确定,从而消除了两者之间的权衡。 此外,利用FZ反射波,还可以精确定位FZ中已获得FZ宽度和速度参数的位置,从而获得了前所未有的FZ构造深度分辨率。 此外,他们能够重新定位余震的精度为几十米相对于FZ的边界。 他们计划将该方法应用于加州各种断层带的数据集,包括Landers,Hector Mine,San Jacinto和Parkfield的SanAndreas Fault,以确定FZ参数(走向,宽度,速度和密度下降,以及Q)和可能的临时变化。 更广泛的影响:所获得的信息对于开发地震源模型至关重要。 在这项研究中获得的经验将有助于设计未来的FZ地震实验和开发的方法可以很容易地应用到其他地区和数据集,如那些从正在进行的美国阵列。
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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Lupei Zhu其他文献
Seismological Evidence for a Remnant Oceanic Slab in the Western Junggar, Northwest China
中国西北准噶尔西准噶尔残留洋板的地震证据
- DOI:
10.1029/2017jb015332 - 发表时间:
2018-05 - 期刊:
- 影响因子:0
- 作者:
Shucheng Wu;Rong Huang;Yixian Xu;Yingjie Yang;Xiaohuan Jiang;Lupei Zhu - 通讯作者:
Lupei Zhu
Detailed Moho geometry beneath southeastern China and its implications on thinning of continental crust
中国东南部的详细莫霍面几何及其对大陆地壳减薄的影响
- DOI:
10.1016/j.jseaes.2015.09.002 - 发表时间:
2015 - 期刊:
- 影响因子:3
- 作者:
Rong Huang;Yixian Xu;Lupei Zhu;Kai He - 通讯作者:
Kai He
Crustal structure of Hubei Province of China from teleseismic receiver functions: Evidence for lower crust delamination
来自远震接收函数的中国湖北省地壳结构:下地壳拆沉的证据
- DOI:
10.1016/j.tecto.2014.09.001 - 发表时间:
2014-12 - 期刊:
- 影响因子:2.9
- 作者:
Rong Huang;Lupei Zhu;Yixian Xu - 通讯作者:
Yixian Xu
Testing the stability of moment tensor solutions for small earthquakes in the Calabro-Peloritan Arc region (southern Italy)
测试卡拉布罗-佩洛里坦弧区(意大利南部)小地震矩张量解的稳定性
- DOI:
10.4430/bgta0009 - 发表时间:
2011 - 期刊:
- 影响因子:0
- 作者:
S. D’Amico;B. Orecchio;D. Presti;A. Gervasi;Lupei Zhu;I. Guerra;G. Neri;R. Herrmann - 通讯作者:
R. Herrmann
Computing Theoretical Seismograms from a Point Source in a Spherical Multilayered Medium
计算球形多层介质中点源的理论地震图
- DOI:
10.1785/0220230173 - 发表时间:
2023 - 期刊:
- 影响因子:3.3
- 作者:
Shaoqian Hu;Lupei Zhu - 通讯作者:
Lupei Zhu
Lupei Zhu的其他文献
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{{ truncateString('Lupei Zhu', 18)}}的其他基金
CSEDI Collab. Research: A joint mineral physics and nano-seismological study on high-pressure faulting in metastable olivine and harzburgite with implications to deep earthquakes
CSEDI 合作。
- 批准号:
1661519 - 财政年份:2017
- 资助金额:
$ 15.5万 - 项目类别:
Continuing Grant
Collaborative Research: Wabash Valley Seismic Experiment
合作研究:沃巴什谷地震实验
- 批准号:
1249701 - 财政年份:2013
- 资助金额:
$ 15.5万 - 项目类别:
Continuing Grant
Collaborative Research: Joint inversion of crust and upper mantle structure in central and eastern Tibetan plateau and its margins
合作研究:青藏高原中东部及其边缘地壳上地幔结构联合反演
- 批准号:
0838195 - 财政年份:2009
- 资助金额:
$ 15.5万 - 项目类别:
Standard Grant
High Resolution Upper Mantle Structure beneath the Tibetan Plateau and Its Surroundings from Studies of Seismic Waveforms
青藏高原及其周围地区高分辨率上地幔结构的地震波形研究
- 批准号:
0439992 - 财政年份:2005
- 资助金额:
$ 15.5万 - 项目类别:
Standard Grant
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