印度北阿坎德邦地震预警系统加尔瓦尔地区地震记录台站站点分类

IF 2.4 Q2 GEOSCIENCES, MULTIDISCIPLINARY VIETNAM JOURNAL OF EARTH SCIENCES Pub Date : 2022-03-22 DOI:10.15625/2615-9783/17010
Pankaj Kumar, Bhavesh Pandey, Kamal, Ashok Kumar
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引用次数: 1

摘要

场地分类是进行区域地震危险性分析和获得地震破坏模式的重要手段。在本研究中,分析了北阿坎德邦地震预警系统地震台网阵列84个站点2015年至2019年记录的地震地面运动,以进行站点分类。估计了平均水平和垂直谱比曲线的优势周期。采用日本道路协会和国家减少地震灾害计划制定的分类方案对遗址进行分类。与此同时,另外两个站点分类索引方案也被应用于分类目的。对地面运动记录采用数据筛选技术,挑选出质量理想的记录。最后,在所使用的方法中,选择复发率最高的位点类别作为该特定位点的最终类别。描述了震级、距离和深度对纵横谱比的影响,得出这些因素对纵横谱比曲线的影响不显著的结论。得到的平均水平与垂直光谱比曲线与已有文献吻合较好。本文对少数遗址的分类与近年来其他方法的分类相比较,得到了验证。从结果可以明显看出,本研究所做的分类与他们吻合得很好。
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Site classification of seismic recording stations of Garhwal region of earthquake early warning system for Uttarakhand, India
Site classification is vital to carry out seismic hazard analysis of a region and get the damage patterns caused by earthquakes. In the present study, the ground motion of earthquakes recorded from 2015 to 2019 at 84 sites of the seismic network array of Earthquake Early Warning System for Uttarakhand are analyzed for site classification purposes. The predominant period from the mean horizontal to vertical spectral ratio curves was estimated. The classification schemes devised by Japan Road Association and National Earthquake Hazards Reduction Program are applied to classify the sites. Along with this, two other site classification indexes schemes are also applied for classification purposes. Data winnowing techniques are used over the ground motion records to pick out desirable quality records. Conclusively, the site class with the highest recurrence rate amongst the used methods is selected as the final class for that particular site. The effect of magnitude, distance and depth on horizontal to vertical spectral ratio are described and concluded that these factors do not significantly affect the ratio curves. The average horizontal to vertical spectral ratio curves obtained for all the sites matches well with the existing literature. The classification of a few sites are verified from the classification done by other methods in recent studies. It is evident from the results that the classification done in this study matches well with them.
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来源期刊
VIETNAM JOURNAL OF EARTH SCIENCES
VIETNAM JOURNAL OF EARTH SCIENCES GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
3.60
自引率
20.00%
发文量
0
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