Abstract: There was large of difference between the result of direct economic loss gained by rapid earthquake hazard evaluation and by earthquake spot investigation. Sometimes the difference was quite obvious. So how to raise the accuracy becomes an urgent problem. The authors have roughly got an adjusted coefficient for economic loss result from the rapid earthquake hazard evaluation method, which is obtained based on ten earthquakes took place in Yunnan region during last eight years, by making some contrast between the result of economic loss gained by rapid earthquake hazard evaluation and by spot investigation, in which the former result has been fixed up from the points of construction unit price and construction loss-ratio. Together with the rectification of the adjusted coefficient, the result of direct economic loss obtained by rapid earthquake hazard evaluation has been improved greatly.

Key words: Rapid earthquake hazard evaluation, Economic loss, Construction unit price, Construction loss ratio