Abstract：Approximate entropy is a quantitative description of the nonlinear dynamics of the complexity of the system changes. In this paper,The geomagnetic Z-component approximate entropy is estimated on four stations(CDP,COQ,XIC and HZH) from July 2007 to June 2012, respectively. The results show that the entropy changes dramatically before the Wenchuan earthquake on four stations,but the biggest change is in CDP(Chengdu station). The preliminary view is that this process is associated with the Wenchuan earthquake gestation process, and the change amplitude may be related to the epicentral distance. This result is beneficial to exploration of the seismogenic mechanism and large earthquake prediction.
XU Kangsheng,XIN Changjiang. Variation of Approximate Entropy of Geomagnetic Z-component
of the 2008 Wenchuan Earthquake[J]. jgg, 2015, 35(1): 154-157.
