Abstract: To investigate whether the accelerating moment release (AMR) appeared before strong and intermediate-strength earthquakes, related to earthquake preparation process, or not, this study carried out a spatio-temporal scanning over them value, denoting AMR level, derived from the seismic activity in the fifth active period of northeast China region. By referring other studies the spatiotemporal windows of mvalue scanning for searching AMR before MSge;5 earthquakes were determined. For the earthquake data during the 5 months before each MSge;5 earthquake a monthly spatial scanning was performed, and the temporalmvariations before theMSge;5 earthquakes were obtained. The result indicates that AMR appeared before the 4 earthquakes out of the 5 studied cases. The same scanning were performed to search for precursory variation of Benioff strain release around the rupture nucleation point before the strong and intermediatestrength earthquakes. The result shows that accelerating Benioff strain release emerged before 3, out of 5, MSge;5 earthquakes studied.