Abstract: In this paper the relation between load-unloading response ratio anomaly and the earthquakes with M_s≥ 4. 6 within and around network of Jiangsu Geomagnetic station from 1983~1997 is studied by using the method of load unloading response ratio presented by Zeng Xiaoping(1996). The index system fitting to Jiangsu Geomagnetic network analytic prediction is presented and its prediction efficiency is assessed.

Key words: Ratio of load-unload response, Index system, Geomagnetic anomaly, Jiangsu region