Source Characteristics and Path Attenuation for the Yangbi, China Seismic Sequence in 2021

Zhou, Yun-Song; Wang, Hongwei; Wen, Rong; Miao, Tianming; Cui, Jianwen

doi:10.1007/s00024-022-03077-x

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…They assumed a three-stage attenuation model of geometric spreading and obtained a quality factor of 481.5f .31 . Zhou et al (2022a) investigated the foreshock-mainshockaftershock sequence of the Yangbi M 6.4 earthquake in 2021. The obtained Q was 64.27f .76 , which was significantly lower than that of the whole Yunnan region, indicating the stronger anelastic attenuation in the Yangbi region than the whole Yunnan region.…”

Section: Results Path Attenuation and Quality Factor Qmentioning

confidence: 99%

“…However, due to the small scale of the events, it is easy to make mistakes in the identification of S-wave, so we limited the maximum hypocentral distance to 120 km to minimize the interference caused by surface waves in the S wave (Ren YF. et al, 2018;Zhou et al, 2022a).…”

Section: Data Set and Data Processingmentioning

confidence: 98%

“…The results of f lc are used to perform a fourth-order Butterworth band-pass acausal filter in frequency domain (Zhou et al, 2022a). A cosine taper of 10% S-wave length was added to both ends of the extracted S-wave to eliminate truncation errors (Wang H. W. et al, 2018;Zhou et al, 2022b).…”

Section: Data Set and Data Processingmentioning

confidence: 99%

See 2 more Smart Citations

Seismic-wave path attenuation and local site responses in eastern Guangdong province revealed by the ground-motion spectral analyses

Zhou²,

Qian³

et al. 2023

Front. Earth Sci.

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In an effort to investigate the attenuation characteristics and site effects in eastern Guangdong, 659 strong-motion recordings received by 27 stations were selected for spectral analysis to separate path attenuation, site effects and source spectra. The path attenuation curves are generally close to the simplest form of distance decay described by R−0.5, and decays the slowest at a frequency of 4 Hz. We decomposed the path attenuation into a combination of geometric spreading and inelastic attenuation. The geometric spreading R−0.15 exhibits a slower distance decay at local distances, indicating that the seismic energy close to the epicenter is not easily dissipated. The quality factors were regressed as Qs(f) = 114.81f.922 in the frequency range .9–20 Hz, lower than those reported for the whole Guangdong region, indicating stronger anelastic attenuation in eastern Guangdong. The site responses in eastern Guangdong show a strong correlation with geological and geotechnical characterization. The stations located in the central mountains have higher predominant frequencies (>10 Hz) accompanied by smaller site amplifications. Larger site amplification is in the southeast coastal area (i.e., Shantou area), where the surface is covered with a thicker layer of soft soil and the predominant frequency of site is relatively low (∼2 Hz). The far-field earthquake will cause greater vibration and damage to this area.

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Section: Results Path Attenuation and Quality Factor Qmentioning

confidence: 99%

Section: Data Set and Data Processingmentioning

confidence: 98%