Analysis on global huge earthquake activity

This article studied possible active period and regions of future global huge earthquakes by analyzing the characteristics of their recurrence period, activity time and spatial distribution. The result shows: ① Statistically there is a significant cycle of 50 years for global seismic activity, with confidence level far higher than 95%. In addition, there are also 80mdash;100 years activity cycles, which are not so significant as above. ② Through analyzing time series of global MSge;8.3 earthquakes, we found that globally the active period lasts for 10mdash;14 years and quiet period is of 39mdash;41 years. The latest strong activity began from 2004, and it may last to 2018. ③ Global huge earthquakes showed evident repeatability. It seems that the northern boundary region of Pacific plate, i.e., Alaska and its vicinity, Aleutian islands and Kuril islands, is the first area with possible huge earthquake of MSge;8.5 in the future, then the South America boundary of Pacific plate, especially Peru and its nearby, would be the second earthquake-prone area. We should focus on and monitor these two areas. The mechanism for huge earthquake recurrence period should be exploited in future.