The Multifractal Characteristics of Seismic Activities in China

Abstract

In recent years, with the frequent occurrence of geological disasters, the prediction and analysis of earthquakes has gradually become a hot topic. This paper studies the multifractal spatio-temporal characteristics of China seismic energy. The study data derives from the seismic activities in the Mainland China from 1970 to 2013. In this study, it comes to a comprehensive conclusion of spatial and temporal multifractal characteristics of earthquake activities in China. The study area is divided into five regions: The Xinjiang region, the Qinghai-Tibetan Plateau region, the Northern China, the Northeast China and the Southern China. In this study, we analyze the spectrum curves of the seismic releasing energy time series to each region, and compare the differences. Then the differences of the multifractal characteristics in the time dimension can be pointed out based on the curve, and the law of earthquake occurrence is analyzed from the sequence diagrams of time intervals among various tectonic areas. In the spatial dimension, it discrete seismic data points for each region through rectangular square grid at different resolutions as the input, then derive the multifractal spectrum curve of spatial characteristic to each region. By analyzing the multifractal dimension, it explores the similarities and differences of the spatial and temporal characteristics of the earthquake among five regions.