Adaptive Method for Revealing Tidal Variations in Weak Seismicity

IF 0.3 Q4 GEOCHEMISTRY & GEOPHYSICS

Seismic Instruments Pub Date : 2023-03-21 DOI:10.3103/S0747923922080199

D. G. Taimazov, M. G. Magomed-Kasumov, T. I. Sharapudinov, M. S. Sultanakhmedov

引用次数: 0

Abstract

The paper proposes a method for searching for the M2 tidal harmonic in seismicity, based on the construction of time series of conditional accumulated seismic energy (CASE) with a given discretization and their adaptive spectral analysis. The preliminary results of testing this method on seismic observations throughout the territory of California for the period 1983–2012 are presented. For the first time, the fundamental harmonic of the lunar tide M2 was reliably identified in weak seismicity variations at a significance level above 5σ in the range of energy classes 5–9. Confinement of areas with significant M2 amplitudes to the San Andreas Fault and its branches was established.

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弱地震活动性中潮汐变化的自适应揭示方法

本文提出了一种基于一定离散化条件累积地震能量时间序列的构造及其自适应谱分析，在地震活动性中搜索M2潮汐调和的方法。本文介绍了1983-2012年在加利福尼亚全境地震观测中测试该方法的初步结果。首次在5 ~ 9级的弱地震活动变化中，在5σ以上显著性水平上可靠地识别出月潮M2的基频。建立了具有显著M2振幅的区域对圣安德烈亚斯断层及其分支的限制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Seismic Instruments GEOCHEMISTRY & GEOPHYSICS-

自引率

44.40%

发文量

期刊介绍： Seismic Instruments is a journal devoted to the description of geophysical instruments used in seismic research. In addition to covering the actual instruments for registering seismic waves, substantial room is devoted to solving instrumental-methodological problems of geophysical monitoring, applying various methods that are used to search for earthquake precursors, to studying earthquake nucleation processes and to monitoring natural and technogenous processes. The description of the construction, working elements, and technical characteristics of the instruments, as well as some results of implementation of the instruments and interpretation of the results are given. Attention is paid to seismic monitoring data and earthquake catalog quality Analysis.