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

中文翻译：

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FRS（故障评级系统）：用于危险​​评估的活动故障的定量分类

摘要

正确估计地震危险性是地震风险评估的试金石。然而，没有定量或标准的方法来包括活动断层或断层带的地质（即地震构造）特征的影响，并且当前的分类方案在危险评估中没有用处。因此，人们试图开发一种整合活动断层地震构造参数的方法，以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/故障区域进行比较审查。在这种方法中，七个地震构造参数用于对断层/断层带进行分类。这七个参数中的每一个都被分配了一个与地震构造特征相对应的值。七个地震构造参数的总和就是断层指数（FI）值，其范围为0-100。对总共 64 个重要断层/断层带进行了统计分析，以确定 FI 与力矩幅度 (Mw) 和峰值地面加速度 (PGA) 的最佳相关性。结果发现，FI 值与最大 Mw 和 PGA 具有很强的相关性。建议城市和区域规划者使用 FRS 来确保在描述地震多发地区活动断层的关键方面和估计地面运动参数时采用一致的方法。

图形概要