Path Attenuation and Source Characteristics during the 2019 Sichuan Changning Earthquake Sequence in China
To give an insight into the path attenuation and source characteristics of the 2019 Sichuan Changning earthquake sequence, 99 strong-motion recordings at 33 stations were studied. The S-wave Fourier amplitude spectra were used to determine the path-attenuation function and key parameters of the seis...
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2022/8141103 |
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| author | Zhijun Jiang Lei Zhang Qi Zhang |
| author_facet | Zhijun Jiang Lei Zhang Qi Zhang |
| author_sort | Zhijun Jiang |
| collection | DOAJ |
| description | To give an insight into the path attenuation and source characteristics of the 2019 Sichuan Changning earthquake sequence, 99 strong-motion recordings at 33 stations were studied. The S-wave Fourier amplitude spectra were used to determine the path-attenuation function and key parameters of the seismic source characteristics of this sequence. The results show the following: (1) The geometric spreading effect presents hinged-trilinear characteristics, and the corresponding geometric spreading rates were −0.97, 0.29, and −0.73 with the crossover distances 90 km and 183 km. (2) The quality factor Q is correlated with frequency and expressed as 217 × f0.82 for the range from 0.1 to 10.0 Hz. (3) The seismic moment was inversely proportional to the cube of the corner frequency, and their product was 2.37 × 1016 N. m/s3. (4) The stress drop varied from 1.18 to 12.44 MPa. Both the attenuation effect and source parameters of this sequence are significantly different from those of the Lushan and the Wenchuan aftershock sequences in the Sichuan region of China. |
| format | Article |
| id | doaj-art-5d5f2b179874463199f4b0c0a2aa8012 |
| institution | Kabale University |
| issn | 1687-8094 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-5d5f2b179874463199f4b0c0a2aa80122025-02-03T05:50:31ZengWileyAdvances in Civil Engineering1687-80942022-01-01202210.1155/2022/8141103Path Attenuation and Source Characteristics during the 2019 Sichuan Changning Earthquake Sequence in ChinaZhijun Jiang0Lei Zhang1Qi Zhang2Key Laboratory of Earthquake Engineering and Engineering VibrationKey Laboratory of Earthquake Engineering and Engineering VibrationSchool of Civil Engineering and ArchitectureTo give an insight into the path attenuation and source characteristics of the 2019 Sichuan Changning earthquake sequence, 99 strong-motion recordings at 33 stations were studied. The S-wave Fourier amplitude spectra were used to determine the path-attenuation function and key parameters of the seismic source characteristics of this sequence. The results show the following: (1) The geometric spreading effect presents hinged-trilinear characteristics, and the corresponding geometric spreading rates were −0.97, 0.29, and −0.73 with the crossover distances 90 km and 183 km. (2) The quality factor Q is correlated with frequency and expressed as 217 × f0.82 for the range from 0.1 to 10.0 Hz. (3) The seismic moment was inversely proportional to the cube of the corner frequency, and their product was 2.37 × 1016 N. m/s3. (4) The stress drop varied from 1.18 to 12.44 MPa. Both the attenuation effect and source parameters of this sequence are significantly different from those of the Lushan and the Wenchuan aftershock sequences in the Sichuan region of China.http://dx.doi.org/10.1155/2022/8141103 |
| spellingShingle | Zhijun Jiang Lei Zhang Qi Zhang Path Attenuation and Source Characteristics during the 2019 Sichuan Changning Earthquake Sequence in China Advances in Civil Engineering |
| title | Path Attenuation and Source Characteristics during the 2019 Sichuan Changning Earthquake Sequence in China |
| title_full | Path Attenuation and Source Characteristics during the 2019 Sichuan Changning Earthquake Sequence in China |
| title_fullStr | Path Attenuation and Source Characteristics during the 2019 Sichuan Changning Earthquake Sequence in China |
| title_full_unstemmed | Path Attenuation and Source Characteristics during the 2019 Sichuan Changning Earthquake Sequence in China |
| title_short | Path Attenuation and Source Characteristics during the 2019 Sichuan Changning Earthquake Sequence in China |
| title_sort | path attenuation and source characteristics during the 2019 sichuan changning earthquake sequence in china |
| url | http://dx.doi.org/10.1155/2022/8141103 |
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