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Observations and modeling of long-period ground-motion amplification across northeast China

Chen, Haichao and Tsai, Victor C. and Niu, Fenglin (2018) Observations and modeling of long-period ground-motion amplification across northeast China. Geophysical Research Letters, 45 (12). pp. 5968-5976. ISSN 0094-8276. https://resolver.caltech.edu/CaltechAUTHORS:20180608-144450318

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Abstract

Basin resonances can significantly amplify and prolong ground shaking, and accurate site‐amplification estimates are crucial for mitigating potential seismic hazards within metropolitan basins. In this work, we estimate the site amplification of long‐period (2–10 s) ground motions across northeast China for both surface waves and vertically incident shear waves. The spatial distribution of relatively large site amplifications correlates strongly with known sedimentary basins for both wave types. However, the site response of surface waves is typically twice as high as that of shear waves at most basin sites. We further show that these site‐amplification features can be well explained by predictions based on the local one‐dimensional structure at each site. Our results highlight the importance of accounting for surface‐wave contributions and demonstrate the usefulness of semi‐analytical theory for surface‐wave amplification, which may be broadly applicable in future seismic hazard analysis.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1029/2018GL078212DOIArticle
ORCID:
AuthorORCID
Chen, Haichao0000-0002-4689-7859
Tsai, Victor C.0000-0003-1809-6672
Niu, Fenglin0000-0002-4156-4780
Additional Information:© 2018 American Geophysical Union. Received 5 APR 2018; Accepted 2 JUN 2018; Accepted article online 8 JUN 2018; Published online 22 JUN 2018. We thank all the people involved in the NECESSArray project for providing the waveform data and Guoliang Li for providing the velocity model used in this study. We also thank Morgan Moschetti and one anonymous reviewer for their constructive comments that improved the quality of this manuscript. Waveform data of the permanent stations were provided by Data Management Centre of the China National Seismic Network at the Institute of Geophysics (SEISDMC, https://doi.org/10.11998/SeisDmc/SN). The NECESSArray data are available from the IRIS data center. This work was jointly supported by the National Key Research and Development Program of China (no. 2017YFC1500300), the National Basic Research Program of China (no. 2015CB250903), the National Natural Science Foundation of China (nos. 41604043 and 41630209), and NSF grants EAR‐1453263, SCEC‐17061, and EAR‐1547228. All the plots were made using the Generic Mapping Tools version 5.4.2 (Wessel et al., 2013).
Group:Seismological Laboratory
Funders:
Funding AgencyGrant Number
National Key Research and Development Program of China2017YFC1500300
National Basic Research Program of China2015CB250903
National Natural Science Foundation of China41604043
National Natural Science Foundation of China41630209
NSFEAR-1453263
NSFSCEC-17061
NSFEAR-1547228
Subject Keywords:Long‐period ground motions; Site amplification; Surface wave; Northeast China
Issue or Number:12
Record Number:CaltechAUTHORS:20180608-144450318
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180608-144450318
Official Citation:Chen, H., Tsai, V. C., & Niu, F. (2018). Observations and modeling of long‐period ground‐motion amplification across northeast China. Geophysical Research Letters, 45, 5968–5976. https://doi.org/10.1029/2018GL078212
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:86939
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:08 Jun 2018 21:52
Last Modified:03 Oct 2019 19:50

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