POSSIBLE PHYSICS MECHANISM OF CROSS-FAULT SHORT LEVELING PRECURSOR ANOMALY IN SHANDONG AREA

On basis of mechanical background analysis of increased seismic activity in southern North China and architectonic relevance between southern North China and the northeast edge of the Tibetan Plateau, significant change of cross-fault short leveling on Gaofengtou, Wusheng, Ganlin and et al.in middle southern segment of the Tanlu fault zone during 2007-2008 is analyzed.The result shows that the significant change may be related to the 2008 Wenchuan M8.0 great earthquake.