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Seismological Investigations of Two Massive Explosions in Tianjin, China

2016; Seismological Society of America; Volume: 87; Issue: 4 Linguagem: Inglês

10.1785/0220150229

1938-2057

Xu Zhao, Wei Feng, Yipei Tan, Juan Li, Shunping Pei, Yanru An, Wei Hua, Shaolin He, Yong Jie Zhao, Jie Liu, Zhenxing Yao,

High-pressure geophysics and materials

Research Article| May 18, 2016 Seismological Investigations of Two Massive Explosions in Tianjin, China Xu Zhao; Xu Zhao aInstitute of Geology and Geophysics, China Academy of Sciences, No. 19, Beitucheng Western Road, Chaoyang District, Beijing 100029, China Search for other works by this author on: GSW Google Scholar Wei Feng; Wei Feng bChina Earthquake Networks Center, No. 5 Nanheng Road, Sanlihe Street, Xicheng District, Beijing 100045, Chinaliujie@seis.ac.cn Search for other works by this author on: GSW Google Scholar Yipei Tan; Yipei Tan cEarthquake Administration of Tianjin Municipality, Friendship Road 19, Hexi District, Tianjin 300201, China Search for other works by this author on: GSW Google Scholar Juan Li; Juan Li aInstitute of Geology and Geophysics, China Academy of Sciences, No. 19, Beitucheng Western Road, Chaoyang District, Beijing 100029, China Search for other works by this author on: GSW Google Scholar Shunping Pei; Shunping Pei dInstitute of Tibetan Plateau Research, Chinese Academy of Sciences, Lin Cui Road, Chaoyang District, Beijing 100101, China Search for other works by this author on: GSW Google Scholar Yanru An; Yanru An bChina Earthquake Networks Center, No. 5 Nanheng Road, Sanlihe Street, Xicheng District, Beijing 100045, Chinaliujie@seis.ac.cn Search for other works by this author on: GSW Google Scholar Wei Hua; Wei Hua eKey Laboratory of Earthquake Prediction, Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China Search for other works by this author on: GSW Google Scholar Shaolin He; Shaolin He bChina Earthquake Networks Center, No. 5 Nanheng Road, Sanlihe Street, Xicheng District, Beijing 100045, Chinaliujie@seis.ac.cn Search for other works by this author on: GSW Google Scholar Yong Zhao; Yong Zhao bChina Earthquake Networks Center, No. 5 Nanheng Road, Sanlihe Street, Xicheng District, Beijing 100045, Chinaliujie@seis.ac.cn Search for other works by this author on: GSW Google Scholar Jie Liu; Jie Liu bChina Earthquake Networks Center, No. 5 Nanheng Road, Sanlihe Street, Xicheng District, Beijing 100045, Chinaliujie@seis.ac.cn Search for other works by this author on: GSW Google Scholar Zhenxing Yao Zhenxing Yao aInstitute of Geology and Geophysics, China Academy of Sciences, No. 19, Beitucheng Western Road, Chaoyang District, Beijing 100029, China Search for other works by this author on: GSW Google Scholar Seismological Research Letters (2016) 87 (4): 826–836. https://doi.org/10.1785/0220150229 Article history first online: 14 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Xu Zhao, Wei Feng, Yipei Tan, Juan Li, Shunping Pei, Yanru An, Wei Hua, Shaolin He, Yong Zhao, Jie Liu, Zhenxing Yao; Seismological Investigations of Two Massive Explosions in Tianjin, China. Seismological Research Letters 2016;; 87 (4): 826–836. doi: https://doi.org/10.1785/0220150229 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietySeismological Research Letters Search Advanced Search ABSTRACT In this study, we analyze available weak‐ and strong‐motion seismograms to discern the main source characteristics of the 12 August 2015 Tianjin explosions. The disaster involved two large explosions, which can be clearly identified in the near‐field seismic recordings. The first explosion (event 1) took place at 15:34:04.68 (UTC) and the second at 15:34:36.94 (UTC). The average time interval between the two events was about 32.3 s, which is consistent with the result determined by cross correlation of the whispering gallery wave (WG phase). The two events did not occur at the same site, and the second explosion was located 65±10 m northwest (N352°W) of the first one. The local magnitudes ML of the two explosions were further measured as 2.4 and 2.9, respectively. The Fourier spectra from the two closest stations, DAG and BET, show that the predominant frequency of the waveforms ranged from 0.7 to 0.9 Hz after the long‐period wavetrains had arrived. According to the distribution of the three‐component peak ground acceleration, the area with a shaking intensity of modified Mercalli intensity VI spanned up to 131 km2. However, the peak intensity of this explosion did not reach an intensity of VII, based on the ground‐motion attenuation relation. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.