Abstract：Silent/slow earthquakes are a form of crustal energy release, it is possible to eliminate the fracture of an earthquake fault but it is said that silent/slow earthquakes may also be the trigger of a normal earthquake because the stress transfer.Some scholars believe that the silent/slow earthquakes are not the fault latch area, little relationship between the two.Despite the divergence of viewpoint about the risk of silent/slow earthquake,there is a same view that the silent earthquake rupture process of slow earthquakes are an part of the earthquake nucleation and may play an important role and silent/slow earthquakes may reveal more movement forms of plate boundary. Currently, about the physical mechanism of the earthquake there is a big controversy yet, some scholars believe that the occurence of slow earthquakes is due to the dehydration of mineral water immersion or the invasion of fluid leading to changes in pore pressure,in the same time, some scholars think that under the same pore pressure according friction law only by numerical simulation the silent/slow earthquake phenomenon can also be observed,and some scholars believe that the silent/slow earthquakes are mainly distributed in a certain distance from the subduction zone seismic reflectors, rather than place from the subduction zone near the interface in a narrow area.
