FRS (Fault Rating System): a quantitative classification of active faults for hazard evaluations

IF 1.8 3区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

International Journal of Earth Sciences Pub Date : 2023-11-24 DOI:10.1007/s00531-023-02360-z

Levent Selçuk, Azad Sağlam Selçuk

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Abstract

The correct estimation of seismic hazards is a touchstone of seismic risk assessments. However, there is no quantitative or standard methodology to include the impacts of geological (i.e., seismo-tectonic) features of active faults or fault zones, and current classification schemes are not useful in hazard evaluations. Therefore, an attempt has been made to develop a methodology that integrates seismo-tectonic parameters of active faults to better inform urban and regional planning decisions. Fault rating system (FRS) provides a comparative review of faults/fault zones using a rating-based approach. In this approach, seven seismo-tectonic parameters are used to classify the fault/fault zone. Each of the seven parameters is assigned a value corresponding to the seismo-tectonic characteristics. The sum of the seven seismo-tectonic parameters is the fault index (FI) value, which lies in the range 0–100. A total of 64 important faults/fault zones were statistically analyzed to determine the best correlations with FI and moment magnitude (Mw) and peak ground acceleration (PGA). It was found that the FI values provide strong correlations with maximum Mw and PGA. It is proposed urban and regional planners use FRS to ensure a consistent approach in characterizing key aspects of active faults in earthquake-prone regions and in estimating ground motion parameters.

Graphical abstract

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FRS(故障等级系统):用于危害评估的活动断层的定量分类

摘要地震危险性的正确估计是地震危险性评估的试金石。然而，目前还没有定量的或标准的方法来包括活动断层或断裂带的地质(即地震构造)特征的影响，而且目前的分类方案在危害评估中是无用的。因此，人们尝试开发一种方法，将活动断层的地震构造参数整合起来，以便更好地为城市和区域规划决策提供信息。故障评级系统(FRS)使用基于评级的方法对故障/断裂带进行比较审查。该方法采用7个地震构造参数对断层/断裂带进行分类。七个参数中的每一个都被赋予一个与地震构造特征相对应的值。7个地震构造参数之和即为断层指数(FI)值，其取值范围为0 ~ 100。共对64个重要断层/断裂带进行统计分析，以确定FI与矩量(Mw)和峰值地面加速度(PGA)的最佳相关性。发现FI值与最大Mw和PGA有很强的相关性。建议城市和区域规划者使用FRS来确保在地震易发地区活动断层的关键方面的特征和估计地面运动参数的一致方法。图形抽象

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来源期刊

International Journal of Earth Sciences 地学-地球科学综合

CiteScore

4.60

自引率

4.30%

发文量

120

审稿时长

4-8 weeks

期刊介绍： The International Journal of Earth Sciences publishes process-oriented original and review papers on the history of the earth, including - Dynamics of the lithosphere - Tectonics and volcanology - Sedimentology - Evolution of life - Marine and continental ecosystems - Global dynamics of physicochemical cycles - Mineral deposits and hydrocarbons - Surface processes.