Speaker
Description
Three explosion events recorded by stations MDJ and BJT on October 9, 2006，May 25, 2009 and Feburary 12，2013 were analyzed and researched, respectively. Both stations belong to Global Sesimic Network (GSN). The mean ratios of the maximum amplitudes and the power spectrum densities are about 2.3 and 2.7 respectively for the 2013 event and the 2009 event. The ratios for 2013 event and 2006 are about 10.1and13.5, which indicates that the energy released by the 2013 event is about 11.8 times as much as that released by the 2006 event and 2.5 times as much as that released by the 2009 event. The maximum cross correlations were 0.9 and 0.99 for 2013 、2006 events and 2013 、2009 events in 2-4 Hz, which mean that the 2013 event is highly correlated to the 2006 and 2009 events in the frequency band which the main energy concentrated, that mean the relative distances of three events are not long. Comparison of phases had been done to determine the relative location of these explosion events. The results told us that 2013 event lies to the Southeast of 2009 events.
