Study on the Attenuation Relationship of Seismic Intensity in Gansu Province

For the purpose of acquiring the intensity attenuation relationship fitted the Gansu province,in this paper,20 earthquakes occurred from 1950-2004 in Gansu province are selected,the host shake's magnitude of which were all greater than or equal to 5.0 and the epicenter intensity were greater than or equal to V.On the basis of above materials,the attenuation relationship of this area was achieved and some analysis and comparison were made between the attenuation relationship of Gansu area and the existing results of western of China.