Abstract
In order to obtain the intensity attenuation law in the north of China, the studied region is divided into four regions according to topographical and geological feature. For making the shape of isoseismal lines from ellipse to circle with the increase of distance, the tail-limited method is derived. Using the ellipse-projection, two-step regression, head-limited and tail-limited method, their intensity attenuation laws are obtained. Through the study of the intensity attenuation law in the greater part of China, the author considers that the intensity attenuation law of China can be roughly divided into: plain-type and mountain-type. So the intensity attenuation law in East China Plain (plain-type for short) can be used in plains and deposit areas and that of the greater part of the regions in Yunnan and Sichuan Provinces (mountain-type for short) can be used in mountains. For the earthquakes occurred on the borders, their attenuation laws are classified respectively. In the side of mountains belong to mountain-type, and in the side of plain plain-type. In the areas where two kinds of topograph intersect isoseismal lines are irregular and the attenuation laws are more complex.
Similar content being viewed by others
References
Compiling Group of National Seismic Intensity Zonation, State Seismological Bureau, 1979.Atlas of Isoseismals in China, 107pp. Seismological Press, Beijing (in Chinese).
Gu, G. X., Lin, T. H. and Shi, Z. L. (Eds.), 1983.Earthquake Catalogue of China (B. C. 1831–1969), 881pp. Science Press, Beijing (in Chinese).
Gu, G. X., Lin, T. H. and Shi, Z. L. (Eds.), 1983.Earthquake Catalogue of China (A. D. 1970–1979), 334pp. Scientific Press, Beijing (in Chinese).
Institute of Geophysics, State Seismological Bureau and Institute of Chinese Historical Geography, Fudan University, 1983.Atlas of the Historical Earthquakes in China — The Ming Dynasty Period 194pp. Cartographic Publishing House, Beijing (in Chinese).
Institute of Geophysics, State Seismological Bureau and Institute of Chinese Historical Geography, Fudan University, 1983.Atlas of the Historical Earthquakes in China—The Qing Dynasty Period, 244pp. Cartographic Publishing House, Beijing (in Chinese).
Research group on Active Fault System around Ordos Massif, State Seismological Bureau, 1988.Active Fault System Around Ordos Massif, 335pp. Seismological Press, Beijing (in Chinese).
Xie, Y. S. and Cai, M. B. (Eds.), 1983.Compilation of Historical Earthquakes in China, 567–777. Science Press, Beijing (in Chinese).
Yu, S. J., 1993. The ellipse-projection and two-step regression method for intensity attenuation law.Acta Seismologica Sinica,6, 541–548.
Author information
Authors and Affiliations
Additional information
Contribution No. 95A0040, Institute of Geophysics, SSB, China.
This subject is sponsored by the Chinese Joint Seismological Science Foundation.
About this article
Cite this article
Yu, SJ. Study of the intensity attenuation law in the East China Plain and the northwest of China. Acta Seismologica Sinica 8, 249–258 (1995). https://doi.org/10.1007/BF02650488
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02650488