Abstract: Maximum entropy spectral analysis has the merits of high resolution and sensibility as well as stability. The introduction of it into the discipline of stress-strain cannot only benefit the development of the earthquake prediction, but also the development of this method. With the observational body-strain data at Xuzhou and Liyang stations, we studied Yellow Sea earthquake (M_S 6.1), Cangshan earthquake (M_S 5.2) and Sheyang earthquake (M_S 4.6). It is found that the strength of the first body-strain primary frequency appears attenuation or accretion in the stage of short-imminent term before the earthquakes. This variation indicates the information of earthquake precursors, and therefore it is applicable to the short-imminent earthquake prediction.

Key words: Earthquake prediction, Maximum entropy spectral analysis, Body strain, Precursor information