The prediction equation for the significant duration of strong motion in the Sichuan-Yunnan region of China

IF 1.6 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Journal of Seismology Pub Date : 2025-01-13 DOI:10.1007/s10950-024-10273-w

Ping Liu, Qingsong Yang, Tao Ma, Tiantian Hui, Jinyue Zhang

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Abstract

The significant duration is a crucial intensity measure for earthquake-resistant design and seismic hazard assessment (SHA). The Sichuan-Yunnan region is characterized by a high level of seismic activity and possesses the most concentrated network of seismic stations in China. The ground motion prediction equation (GMPE) is the predominant approach to estimating significant durations. The existing prediction equations for the significant duration are not well-suited for the Sichuan-Yunnan region. This study used data from the National Strong Motion Observation Network System (NSMONS) of China in this region to develop prediction equations for significant durations of D_S5-75 and D_S5-95. The equations took into account variables including moment magnitude (M_w), fault distance (R_rup), average shear wave velocity of 30 m on the soil profile (V_S30), and depth to the top of the rupture (Z_tor). Our database has a singular instance of the Wenchuan earthquake with M_w > 7. The restricted data complicates the calibration of our model for events with M_w > 7. Therefore, we suggest the equations be valid in the Sichuan-Yunnan region for M_w between 4.2 and 7.0, R_rup from 0 to 300 km, and V_S30 values ranging from 139 to 900 m/s.

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川滇地区强运动显著持续时间的预测方程

有效持续时间是抗震设计和地震危险性评价的重要强度指标。四川-云南地区是中国地震活动频繁、台网分布最集中的地区。地震动预测方程（GMPE）是估计显著持续时间的主要方法。现有的显著时长的预测方程不太适合川滇地区。利用中国国家强运动观测网系统（NSMONS）在该地区的数据，建立了DS5-75和DS5-95显著持续时间的预测方程。方程考虑了矩量级（Mw）、断层距离（Rrup）、30 m的平均横波速度（VS30）和破裂顶部深度（Ztor）等变量。我们的数据库中有汶川地震的单一实例，震级为Mw >； 7。受限制的数据使我们的模型对Mw >事件的校准变得复杂。因此，我们认为该方程适用于川滇地区，即Mw在4.2 ~ 7.0之间，Rrup在0 ~ 300 km之间，VS30在139 ~ 900 m/s之间。

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来源期刊

Journal of Seismology 地学-地球化学与地球物理

CiteScore

3.30

自引率

6.20%

发文量

审稿时长

3 months

期刊介绍： Journal of Seismology is an international journal specialising in all observational and theoretical aspects related to earthquake occurrence. Research topics may cover: seismotectonics, seismicity, historical seismicity, seismic source physics, strong ground motion studies, seismic hazard or risk, engineering seismology, physics of fault systems, triggered and induced seismicity, mining seismology, volcano seismology, earthquake prediction, structural investigations ranging from local to regional and global studies with a particular focus on passive experiments.