地震快速概率定位新算法

IF 2 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS Acta Geophysica Pub Date : 2016-12-28 DOI:10.1515/acgeo-2016-0111
W. Debski, P. Klejment
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引用次数: 4

摘要

地震震源的空间定位是在物理的许多分支,包括地震学、海洋学等,分析来自自然(不受控制)源的瞬态波时的首要任务之一。众所周知,没有一种通用的定位算法在所有情况下都表现得同样好。震源活动及其随时间的空间变异性、记录网络的几何形状、波速分布的复杂性和非均质性都是影响定位算法性能的因素。本文利用波动方程的互易性和时逆不变性,提出了一种新的定位算法。基于这些对称性并使用现代有限差分型eikonal求解器,我们开发了一种新的非常快速的算法来执行全概率(贝叶斯)源定位。我们举例说明了该算法对波兰西南部Rudna铜矿1647个地震事件进行高级误差分析的效率。
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The New Algorithm for Fast Probabilistic Hypocenter Locations
The spatial location of sources of seismic waves is one of the first tasks when transient waves from natural (uncontrolled) sources are analysed in many branches of physics, including seismology, oceanology, to name a few. It is well recognised that there is no single universal location algorithm which performs equally well in all situations. Source activity and its spatial variability in time, the geometry of recording network, the complexity and heterogeneity of wave velocity distribution are all factors influencing the performance of location algorithms. In this paper we propose a new location algorithm which exploits the reciprocity and time-inverse invariance property of the wave equation. Basing on these symmetries and using a modern finite-difference-type eikonal solver, we have developed a new very fast algorithm performing the full probabilistic (Bayesian) source location. We illustrate an efficiency of the algorithm performing an advanced error analysis for 1647 seismic events from the Rudna copper mine operating in southwestern Poland.
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来源期刊
Acta Geophysica
Acta Geophysica 地学-地球化学与地球物理
CiteScore
3.90
自引率
13.00%
发文量
251
审稿时长
5.3 months
期刊介绍: Acta Geophysica is open to all kinds of manuscripts including research and review articles, short communications, comments to published papers, letters to the Editor as well as book reviews. Some of the issues are fully devoted to particular topics; we do encourage proposals for such topical issues. We accept submissions from scientists world-wide, offering high scientific and editorial standard and comprehensive treatment of the discussed topics.
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