Abstract：Nowadays dynamite is strictly forbidden as seismic acquisition source in security-sensitive areas of the international market,and heavy vibrators cannot be used in some rough terrain.In this case, improved accelerated weight drop can be used in this kind of terrain.Taking AF450,an improved accelerated weight drop,as an example,we first introduce its operational principle in this article. Then we compare seismic data with this weight drop and other sources in the same area.The results prove that the accelerated weight drop is efficient and environmental.High frequency component absented in the data acquired by the accelerated weight drop can be compensated by processing methods.So the accelerated weight drop is an effectively alternative source for some special terrain.
