Rapid deployment of a seismic array in Ecuador following the April 16th 2016 M7.8 Pedernales earthquake

2016 年 4 月 16 日 M7.8 佩德纳莱斯地震后，厄瓜多尔快速部署地震台阵

• 批准号: NE/P008828/1
• 负责人: Benjamin Edwards
• 金额: $ 6.67万
• 依托单位: University of Liverpool
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FP008828%2F1
• 关键词: Rapid; deployment; seismic; array; Ecuador

This project will rapidly deploy a seismological network at the southern end of the April 16th 2016 M7.8 Pedernales earthquake in Ecuador (Objective 1). Our project partners are currently deploying seismological stations in the central (GEOAZURE, IRD, France) and northern (IRIS, USA) regions of the fault zone. The seismological network will record earthquake activity continuously for a period of 10 months, with a service after 5 months. The dataset obtained, which will be openly shared among our project partners and the scientific community will provide unprecedented resolution on imaging aftershock activity on the subduction interface. Once collected after 5 and 10 months, the continuous data will be processed to detect earthquakes which will be located while jointly determining high-resolution 3D velocity structure in this tectonically complex subduction zone. By interpreting the spatial and temporal distribution and migration of aftershock activity we will gain valuable insight into the stress conditions at the subduction interface. Additional analysis of attenuation that the seismic waves have undergone will, when jointly interpreted with the P-wave and S-wave velocity structure, will provide information as to the chemical and mineralogical nature of the subduction zone and processes. In order to interpret the seismological data in terms of the stress and strain changes that have taken place before, during and after the M7.8 earthquake, we will use satellite interferometry to determine, for the first time, a multi-temporal InSAR time series (Objective 2). This will be done by processing multiple satellite images of the zone, from 6 months before to 12 months after the earthquake. From these images we can ascertain the ground deformation. The data collected will allow us to bring together interdisciplinary information to interpret the state of stress and its evolution in this poorly studied and instrumented part of the world. Finally, using all data and interpretations gathered we will address the question of whether the southern region of the fault zone is likely to rupture, and what the likely response of nearby volcanic zones will be to changes in the regional stress field.

该项目将在2016年4月16日厄瓜多尔M7.8佩德纳莱斯地震的南端快速部署地震台网（目标1）。我们的项目合作伙伴目前正在断裂带的中部（法国税务局 GEOAZURE）和北部（美国 IRIS）地区部署地震台站。地震台网将连续记录10个月的地震活动，5个月后提供服务。获得的数据集将在我们的项目合作伙伴和科学界之间公开共享，将为俯冲界面余震活动的成像提供前所未有的分辨率。一旦在 5 个月和 10 个月后收集到，将处理连续数据以检测将要定位的地震，同时共同确定这个构造复杂的俯冲带的高分辨率 3D 速度结构。通过解释余震活动的时空分布和迁移，我们将获得对俯冲界面应力条件的宝贵见解。当与纵波和横波速度结构联合解释时，对地震波所经历的衰减的额外分析将提供有关俯冲带和过程的化学和矿物学性质的信息。为了解释M7.8地震之前、期间和之后发生的应力和应变变化的地震数据，我们将首次使用卫星干涉测量来确定多时相InSAR时间序列（目标 2）。这将通过处理该地区从地震前 6 个月到地震后 12 个月的多幅卫星图像来完成。从这些图像中我们可以确定地面变形。收集到的数据将使我们能够汇集跨学科信息，以解释世界上这个研究和仪器匮乏的地区的压力状态及其演变。最后，利用收集到的所有数据和解释，我们将解决断裂带南部地区是否可能破裂以及附近火山带对区域应力场变化可能做出的反应的问题。

项目成果

3D Local Earthquake Tomography of the Ecuadorian Margin in the Source Area of the 2016 Mw 7.8 Pedernales Earthquake

2016 年 Mw 7.8 佩德纳莱斯地震震源区厄瓜多尔边缘的 3D 局部地震层析成像

• DOI: http://dx.10.1029/2020jb020701
• 发表时间: 2021
• 期刊: Solid Earth
• 影响因子: 3.4
• 作者: León

1D-velocity structure and seismotectonics of the Ecuadorian margin inferred from the 2016 Mw7.8 Pedernales aftershock sequence

根据 2016 年 Mw7.8 Pedernales 余震序列推断的厄瓜多尔边缘一维速度结构和地震构造

• DOI: http://dx.10.1016/j.tecto.2019.228165
• 发表时间: 2019
• 期刊: Tectonophysics
• 影响因子: 2.9
• 作者: León

An Improved Phase Filter for Differential SAR Interferometry Based on an Iterative Method

基于迭代法的差分SAR干涉测量改进相位滤波器

• DOI: 10.1109/tgrs.2018.2820725
• 发表时间: 2018-04-18
• 期刊: IEEE Transactions on Geoscience and Remote Sensing
• 影响因子: 8.2
• 作者: Alej;ro Mestre;ro;J. Lopez;J. Selva;P. González
• 通讯作者: P. González