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http://dx.doi.org/10.12814/jkgss.2019.18.4.107

Development of Earthquake Early Warning System nearby Epicenter based on P-wave Multiple Detection  

Lee, Taehee (Future Infrastructure Research Center, Department of Infrastructure Safety Research, Korea Institute of Civil Engineering and Building Technology)
Noh, Jinseok (Institute of Technology, Doit Co., LTD.)
Hong, Seungseo (Department of Infrastructure Safety Research, Korea Institute of Civil Engineering and Building Technology)
Kim, YoungSeok (Department of Infrastructure Safety Research, Korea Institute of Civil Engineering and Building Technology)
Publication Information
Journal of the Korean Geosynthetics Society / v.18, no.4, 2019 , pp. 107-114 More about this Journal
Abstract
In this paper, the P-wave multiple detection system for the fast and accurate earthquake early warning nearby the epicenter was developed. The developed systems were installed in five selected public buildings for the validation. During the monitoring, a magnitude 2.3 earthquake occurred in Pohang on 26 September 2019. P-wave initial detection algorithms were operated in three out of four systems installed in Pohang area and recorded as seismic events. At the nearest station, 5.5 km from the epicenter, P-wave signal was detected 1.2 seconds after the earthquake, and S-wave was reached 1.02 seconds after the P-wave reached, providing some alarm time. The maximum accelerations recorded in three different stations were 6.28 gal, 6.1 gal, and 5.3 gal, respectively. The alarm algorithm did not work, due to the high threshold of the maximum ground acceleration (25.1 gal) to operate it. If continuous monitoring and analysis are to be carried out in the future, the developed system could use a highly effective earthquake warning system suitable for the domestic situation.
Keywords
Earthquake; Early warning; P-wave; Auto picking algorithm; MEMS sensor;
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  • Reference
1 Allen, R. V. (1982), "Automatic phase-pickers: their present use and future prospects", Bulletin of the Seismological Society of America, Vol.72, No.6B, pp.S225-S242.   DOI
2 Espinosa-Aranda, J. M., Jimenez, A., Ibarrola, G., Alcantar, F., Aguilar, A., Inostroza, M. and Maldonado, S. (1995), "Mexico City Seismic Alert System", Seismological Research Letters, Vol.66, pp.42-52.
3 Kanamori, H. (2005), "Real-time seismology and earthquake damage mitigation", Annual Review of Earth and Planetary Sciences, Vol.33, pp.195-214.   DOI
4 Nakamura, Y. (1984), "Development of earthquake earlywarning system for the Shinkansen", Proc. of the Japanese National Committee of the International Association of Earthquake Engineering, pp.224-238.
5 Nakamura, Y. (1988), "On the urgent earthquake detection and alarm system (UrEDAS)", Proc. of the 11th World Conference on Earthquake Engineering, paper no.2134.
6 Cooper, J. D. (1868), Earthquake indicator, San Francisco Daily Evening Bulletin, 3rd November.