Abstract: Coseismic and post-seismic effect is remarkable characteristics of the anomalous changes of ground water. In this paper, through many years′study on earthquake prediction, and on the basis of observational data since 1982, the mechanism and characteristics of coseismic and post-seismic effect are analyzed, the space distribution, suchas single well, concentration, b and ing and migrationetc. of post seismic effect is put forward. This has indicative significance for predicting the location of after shocks in the old seismic area and successive earthquakes in theperiphery area and nearthe well location. It can also provide clue for the mid-term and short-term prediction and type judgment of successive earthquakes.

Key words: Ground water, Coseismic and post-seismic effect, Earthquake prediction