Ground motion attenuation relation for small to moderate earthquakes in Fujian region, China

摘要

We collect 1974 broad-band velocity records of 94 earthquakes (ML=2.8-4.9, △=13～462 km) from seven stations of the Fujian Seismic Network from March 1999 to March 2007. Using real-time simulation, we obtain the corre-sponding acceleration and then adopt different models to analyze the seismic data. As a result, a new attenuation relationship between PGA and PGV of the small and moderate earthquakes on bedrock site in Fujian region is established. The Yongchun earthquake occurred recently verifies the attenuation relationship well. This paper pro-vides a new approach for studying the ground motion attenuation relationship using velocity records.