Analysis on Characteristics of Acceleration Records for the Minle-Shandan M_S6.1,5.8 Earthquakes on Oct.25,2003
Shaolin He, Wenkai Chen · Journal of Seismological Research · 2006
On Oct.25,2003 occurred the Minle-Shandan M_S6.1,5.8 earthquakes in Gansu.To Nov.12,2003,altogether occurred 67 shocks and triggered 94 items(282 channels) of acceleration records.We process the records in time and frequency domains.The results show:(1)vertical acceleration peaks are bigger than horizontal ones generally;(2) the area within 50km,specially the area 30km from the epicenter,is main earthquake disaster area;(3) the factors to effect acceleration response spectrum differ with varying situations,so it is necessary to pay attention to key factors in practice.