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Attenuation characteristics of peak horizontal acceleration in Northeast and Southwest China
Author(s) -
Peng KeZhong,
Wu F. T.,
Song Liangyu
Publication year - 1985
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.4290130307
Subject(s) - china , attenuation , seismology , geology , magnitude (astronomy) , intensity (physics) , geography , chine , geodesy , physics , archaeology , quantum mechanics , astronomy , optics
Regional seismic characteristics in northeastern and southwestern China are quite different. Earthquakes are more frequent in SW China than in NE China and intensity attenuates faster in SW China than in NE China. Through regression analyses of data from these two regions we have found the attenuation of peak horizontal accelerations also to be noticeably different. For northeastern China the regression is log 10 (a) = −0.474 + 0.613 M − 0.873 log 10 ( R ) −0.00206 R and for southwestern China, the regression is log 10 ( a ) = 0.437 + 0.454 M − 0.739 log 10 ( R ) −0.00279 R where a is acceleration in cm/sec 2 , M is the Chinese surface wave magnitude (Institute of Geophysics, State Seismological Bureau), and R is the distance in kilometres. The formula for northeastern China has distance coefficients similar to those for Central United States as derived by Nuttli and Herrmann 14 .