2007年秘鲁皮斯科8.0级地震区的地震速度结构:对纳斯卡山脊附近俯冲机制的启示

IF 1 Q3 GEOCHEMISTRY & GEOPHYSICS
I. Bernal, H. Tavera
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引用次数: 0

摘要

在这项研究中,我们提出了2007年秘鲁皮斯科地震()地区的速度模型,该模型使用双差分层析成像算法获得,该算法考虑了6个月的余震。研究区域特别令人感兴趣,因为它位于纳斯卡山脊的北部边缘,其中大型测深结构的俯冲是秘鲁中部海岸地貌特征的起源。重新定位的地震活动被用来推断纳斯卡山脊北侧俯冲板块的几何形状。结果证明,由于山脊的俯冲,几何形状是连续但凸起的,从而解释了在该地区观察到的高隆起率。我们推断的地震活动性分布与同震和震后滑动分布一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Seismic Velocity Structure in the Area of the 2007, Mw 8.0, Pisco-Peru Earthquake: Implications for the Mechanics of Subduction in the Vicinity of the Nazca Ridge
In this study, we present a velocity model for the area of the 2007 Pisco-Peru earthquake ( ) obtained using a double-difference tomography algorithm that considers aftershocks acquired for 6 months. The studied area is particularly interesting because it lies on the northern edge of the Nazca Ridge, in which the subduction of a large bathymetric structure is the origin of geomorphological features of the central coast of Peru. Relocated seismicity is used to infer the geometry of the subduction slab on the northern flank of the Nazca Ridge. The results prove that the geometry is continuous but convex because of the subduction of the ridge, thereby explaining the high uplift rates observed in this area. Our inferred distribution of seismicity agrees with both the coseismic and postseismic slip distributions.
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来源期刊
International Journal of Geophysics
International Journal of Geophysics GEOCHEMISTRY & GEOPHYSICS-
CiteScore
1.50
自引率
0.00%
发文量
12
审稿时长
21 weeks
期刊介绍: International Journal of Geophysics is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles in all areas of theoretical, observational, applied, and computational geophysics.
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