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Attenuation characteristics of ground motions in northern China

Wong Yuk Lung (»ÆÓñÁú),  Zhao John X (ÕÔÐËȨ)   and  Luo Qifeng (ÂÞÆæ·å)  

1. Department of Civil and Structural Engineering, The Hong Kong   Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
2. Institute of Geological & Nuclear Sciences, P.O. Box 30 368, Gracefield, Lower Hutt, New Zealand 
3. Research Institute of Structural Engineering & Disaster Reduction, Tongji University, Siping Rd 1239,
Shanghai 200092, China

Abstract: Four recently developed attenuation models are calibrated by using a very limited amount of strong motion data recorded in China. The research shows that the attenuation characteristics of the earthquake shaking in northern China are similar to those in the western US. The supporting evidence includes Q factors, preliminary results of kappa values, stress drop, shear wave velocity profile in the shallow earth crust, areas enclosed by the isoseismics of Modified Mercalli Intensity V. From these comparisons of different attenuation models, it is recommended that the Crouse and McGuire spectral attenuation model could possibly be used for northern China.

Keywords: Strong ground motions; response spectra; attenuation model; western US; northern China