Synchronization analysis of stability of magma chamber

The stability of magma chamber is controlled by the interior factors, e.g. behavior of activities and cooling rate of the magma chamber, and the exterior factors, e.g. the extrusion and vibration of the rocks around the magma chamber. Under certain conditions, the activities of the rocks around the magma chamber can play a crucial role in the stability of magma chamber, especially in the area with frequent crustal movement. On the basis of the fieldwork in several volcanoes in Wudalianchi Area, Heilongjiang Province, China, by the principle and method of tectonics, geological fluid dynamics, volcanology and non-linear dynamics, we discussed the evolution of the whole properties of magma chamber (mainly pressure) by the oscillator model for magma chamber. According to theoretical analysis, the dynamical complexity of the activities of magma chamber exhibits four types: dissipation, collapse, stabilization and chaos. Further, on the basis of the principle of synchronization, it is found that the phases of oscillators are locked strictly when the evolution of properties of magma chamber approaches the critical state of respective attractor. This result may be useful for forecasting the volcanic activities with seismic data.