Some analysis of seismicity in the Sumatra area

Abstract: Investigating both aftershock behaviour and a wide spectrum of parameters may find the key to better explain the mechanism of seismicity as a whole. In particular the purpose of this work is to apply some different statistical approaches related to the seismicity of “Sumatra area ” (Indonesia). We focalised our attention on the seismicity from 1973 to 2004 and on different seismic sequences happened in this area. We estimated the variation of p-value, b-value, the energy involved into the decay process and the fractal dimensions D0 and D2 to highlight the clustering of events in time. 1