Some Characteristics of Seismicity Before Strong Earthquake Chi-Chi (MW = 7.6), 1999, Taiwan

Autor:	C. C. Wang, I. P. Kuzin, H. Hs. Chen, M. C. Fang, A. B. Flynov, D. G. Levchenko, R.Y.K. Yang, Y. Chang
Rok vydání:	2013
Předmět:	Peak ground acceleration Range (statistics) Seismic energy Angular coefficient Induced seismicity Geology Seismology Foreshock
Zdroj:	Earth Science Research. 2
ISSN:	1927-0550 1927-0542
DOI:	10.5539/esr.v2n2p143
Popis:	The purpose of this paper is an analysis of features of the seismic regime before one of the strongest earthquake Taiwan in the twentieth century (Chi-Chi, 21.09.1999, Mw = 7.6). According to data for 1990-1999 variations of three parameters of the seismic regime were studied retrospectively: total annual number of earthquakes N? in the range of magnitudes of ML = 2.5-5.5, total annual quantity of released seismic energy ?E, J and angular coefficient b of graphs of recurrence of earthquakes. There were chosen two obvious sub-periods in course the seismic regime – quiescence in 1990-1996 and activation in 1997-1999. Earthquake of Chi-Chi occurred on a maximum of seismic activity. Overestimated value of coefficient b (-1.16 on average) is conditioned by prevalence of weak earthquakes in a period of preparation the Chi-Chi earthquake.
Databáze:	OpenAIRE
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