Proceedings of the 10th Annual Meeting of Risk Analysis Council of China Association for Disaster Prevention (RAC 2022)

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Analysis of the Impact of Topographic Effect on Ground Motion Characteristics in the Extreme Seismic Region of Yangbi MS6.4 Earthquake on May 21, 2021

Authors
Libao Zhang1, Lei Fu1, *, Zhenghua Zhou2, Guoliang Lin3, Su Chen4, Aiwen Liu1, Xiaojun Li1, 4
1Institute of Geophysics, China Earthquake Administration, Beijing, China
2Nanjing Tech University, Jiangsu, China
3Yunnan earthquake Agency, Yunnan, China
4Beijing University of Technology, Beijing, China
*Corresponding author. Email: fulei11@cea-igp.a.cn
Corresponding Author
Lei Fu
Available Online 21 July 2023.
DOI
10.2991/978-94-6463-194-4_15How to use a DOI?
Keywords
earthquake damage phenomenon; high frequency attenuation parameters; site effect; topographic effect
ABSTRACT

This paper conducted a damage investigation on the micro epicenter of the Yangbi Ms6.4 earthquake on May 21, 2021. Based on the observation data of mobile observation topographic array, the influence of topographic effect on ground motion characteristics is analyzed. It is found that if the seismic wave is incident perpendicular to the mountain trend, the steep slope will amplify the high-frequency part of the seismic wave, and there are obvious differences in the low-frequency part of Fourier amplitude spectrum along the mountain trend and vertical at different elevations. The site component ( κ 0 ) of high-frequency attenuation parameters is calculated by spectral attenuation method, then the relationship between the horizontal component of κ 0 , the vertical component of κ 0 , the ratio of horizontal to vertical component of κ 0 and station elevation, site weakness and dominant frequency is analyzed respectively. The results show that in the small-scale range, the horizontal and vertical components of κ 0 have strong spatial heterogeneity, which needs further verification.

Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 10th Annual Meeting of Risk Analysis Council of China Association for Disaster Prevention (RAC 2022)
Series
Advances in Economics, Business and Management Research
Publication Date
21 July 2023
ISBN
10.2991/978-94-6463-194-4_15
ISSN
2352-5428
DOI
10.2991/978-94-6463-194-4_15How to use a DOI?
Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Libao Zhang
AU  - Lei Fu
AU  - Zhenghua Zhou
AU  - Guoliang Lin
AU  - Su Chen
AU  - Aiwen Liu
AU  - Xiaojun Li
PY  - 2023
DA  - 2023/07/21
TI  - Analysis of the Impact of Topographic Effect on Ground Motion Characteristics in the Extreme Seismic Region of Yangbi MS6.4 Earthquake on May 21, 2021
BT  - Proceedings of the 10th Annual Meeting of Risk Analysis Council of China Association for Disaster Prevention (RAC 2022)
PB  - Atlantis Press
SP  - 101
EP  - 115
SN  - 2352-5428
UR  - https://doi.org/10.2991/978-94-6463-194-4_15
DO  - 10.2991/978-94-6463-194-4_15
ID  - Zhang2023
ER  -