Study of Earthquake Clustering in the Rushan Area

Using the clumping earthquake identification method based on the nearest event distance algorithm by Zaliapin et al.[1-2] to investigate the characteristics of earthquake clumping for the Lushan earthquake swarm that occurred on October 1, 2013, the analysis of the results based on the calculated sequence development at different time periods shows that the seismic events in the Lushan earthquake sequence are basically still influenced by the larger earthquakes in the sequence as time passes, and the clumping of the sequence is obvious, with only a small fraction of "background earthquakes" [3-4] reflecting the regional stress state, with a clumping rate of 96%.