Pre-slip activity may be the physical mechanism of remote correlation of earthquake precursory anomaly
Paying attention to the phenomenon of remote correlation of the earthquake precursor is helpful in accurately predicting the epicenter position in the future.Before the Wenchuan Mw 7.9 earthquake on May 12th,2008,pre-slip activities occurred in the North China tectonic-block region and its sub-tectonic-blocks in a quasi-synchronous manner on March 20,2008.More than 1 day before the impending earthquake,the low-frequency tremor phase Tp was recorded by water level meter,deformation meter,and ground and underground barometers at 10 seismic stations in the Hebei-Shandong and Yellow Sea-East Shandong sub-tectonic-blocks.They are closely related to the pre-slip activity of the North China tectonic blocks and the occurrence of the Wenchuan Mw 7.9 earthquake.We speculate that the North China tectonic block and its sub-tectonic block may have experienced a low-frequency tremor after pre-slip activities driven by the convective force of mantle thermal material before the Wenchuan MW7.9 earthquake.It is the remote-correlation phenomenon of the precursory anomaly of the MW7.9 earthquake.The pre-slip activity on the scale of thousands of km may be the physical mechanism of the remote correlation of earthquake precursory anomaly.To clarify whether it is the precursory anomaly near the epicenter or the precursory anomaly of remote correlation is undoubtedly crucial to predicting the future epicenter.
万方数据
维普
