No Anomaly Appearance in Pre-Earthquake Phenomena Center

Most of studies about pre-earthquake phenomena are observed by the electromagnetic (EM) emission and the geomagnetic filed anomalies, which are possibly influenced from electric currents but the relationship between the phenomena and mechanisms is never understood completely due to many fail events. The sufficient magnitude of current flows produced by rock-stressed is certainly existence, but the epicenter is also considered center of earthquake precursors. Sometimes, no pre-earthquake phenomena are confused so that the statistics is a method for supporting the observed results. However, earthquake precursors are produced by earthquakes, pre-earthquake phenomena should be showed by seismology. Here we combine focal depths, fault plane solutions of more than 40 events from 1989 to 2000 with epicenteral distance of water pressured to prove that the epicenter is not the center of precursors. Base on the results, the center of pre-earthquake phenomena where is no anomalous appearance in an area with radius 20Km is located on the surface.