更新的土耳其强震数据库(SMD-TR)

IF 3.1 2区 工程技术 Q2 ENGINEERING, CIVIL
M. Sandıkkaya, Baran Güryuva, Ö. Kale, Oğuz Okçu, Abdullah İçen, E. Yenier, S. Akkar
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引用次数: 0

摘要

我们更新了最初由 Akkar 等人编制的土耳其地震强震数据库(SMD-TR)。更新后的数据集包括 1976 年至 2023 年间发生的 9244 次震级为 3.0 ≤ M ≤ 7.8 的地震。其中包括在 1022 个站点记录的 95,890 个三分量波形(55,375 条记录来自 6710 个事件和 974 个站点)。该数据库在以研究为导向的网站 DesignSafe ( https://doi.org/10.17603/ds2-f21x-s189 )上发布,汇编成地动平面文件,并将在 2025 年前定期更新。已发布的版本包括 2023 年 2 月 28 日之前在土耳其发生的事件,因此包括 2023 年 2 月 6 日卡赫拉曼马拉什地震的主震和大部分余震。数据库包括从国家和国际地震机构以及文献中汇编的事件元数据。我们根据其构造环境(即活跃地壳和俯冲)对地震事件进行了分类,并识别了余震。我们利用 AFAD1 提供的台站信息计算了主要的现场参数,包括最上层 30 米剪切波速度的时间平均值(VS30)和剪切波速度(VS)达到 1 千米/秒时的岩层深度(Z1)。我们还计算了有限断层距离指标,标记了位于断裂悬壁一侧的站点,并识别了脉冲样记录。我们开发了一种自动处理算法来确定波形质量,应用适当的滤波截止来去除低频和高频噪声,并计算地动参数。自动处理适用于小震级(M < 5.5)事件,而手动处理方案则适用于较大事件(M ≥ 5.5)记录的波形。地动峰值、频谱序数和地动持续时间与主要数据处理参数一起提供在平面文件中。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An updated strong-motion database of Türkiye (SMD-TR)
We updated the earthquake strong-motion database of Türkiye (SMD-TR) that is initially compiled by Akkar et al. The updated data set consists of of 9244 earthquakes of magnitudes 3.0 ≤ M ≤ 7.8 that occurred between 1976 and 2023. It includes 95,890 three-component waveforms recorded at 1022 stations (55,375 records that are processed from 6710 events and 974 stations). The database is disseminated under research-oriented website DesignSafe ( https://doi.org/10.17603/ds2-f21x-s189 ) and is compiled to provide ground-motion flatfile, which will be updated periodically until 2025. The released version includes events occurred in Türkiye until 28 February 2023, and hence, it comprises of the mainshocks and a great portion of aftershocks from the February 6th, 2023, Kahramanmaraş earthquakes. The database includes event metadata compiled from national and international seismological agencies as well as the literature. We classified events according to their tectonic environments (i.e. active crustal and subduction) and identified the aftershocks. The station information provided by AFAD1 was used to compute the major site parameters, including time-based average of shear-wave velocity of uppermost 30 m (VS30) and depth-to-rock horizon at which the shear-wave velocity (VS) attains 1 km/s (Z1). We also computed the finite-fault distance metrics and flagged the stations located on the hanging-wall side of the rupture, as well as identified pulse-like records. We developed an automatic processing algorithm to determine the waveform quality, apply appropriate filtercut-offs to remove low- and high-frequency noise, and compute ground-motion parameters. The automatic processing was applied to small-magnitude (M < 5.5) events, whereas manual processing scheme is preferred for waveforms recorded from larger events (M ≥ 5.5). The peak ground-motion values, spectral ordinates, and ground-motion duration are provided along with the key data processing parameters in the flatfile.
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来源期刊
Earthquake Spectra
Earthquake Spectra 工程技术-工程:地质
CiteScore
8.40
自引率
12.00%
发文量
88
审稿时长
6-12 weeks
期刊介绍: Earthquake Spectra, the professional peer-reviewed journal of the Earthquake Engineering Research Institute (EERI), serves as the publication of record for the development of earthquake engineering practice, earthquake codes and regulations, earthquake public policy, and earthquake investigation reports. The journal is published quarterly in both printed and online editions in February, May, August, and November, with additional special edition issues. EERI established Earthquake Spectra with the purpose of improving the practice of earthquake hazards mitigation, preparedness, and recovery — serving the informational needs of the diverse professionals engaged in earthquake risk reduction: civil, geotechnical, mechanical, and structural engineers; geologists, seismologists, and other earth scientists; architects and city planners; public officials; social scientists; and researchers.
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