摘要
Three strong earthquakes with magnitudes of MW 8.4, MW 7.9 and MW 7.0 occurred in the sea west of Sumatra Island on September 12 and 13, 2007. We relocated the epicenters and focal depths of the three events by means of the reversal-time imaging technique using broadband digital seismic data from worldwide stations ranging from 30° to 90°, imaged the spatiotemporal variation of the energy radiation sources by means of the nonplane wave array technique using the broadband digital seismic data from a generalized array made up of 33 stations of the Capital Region Digital Seismograph Net-work (CRDSN), and obtained the rupture duration times, extents and rupture velocities. Also, we dis-cussed the correlations between the locations of the energy radiation sources of the three events.
Three strong earthquakes with magnitudes of Mw 8.4, Mw 7.9 and Mw 7.0 occurred in the sea west of Sumatra Island on September 12 and 13, 2007. We relocated the epicenters and focal depths of the three events by means of the reversal-time imaging technique using broadband digital seismic data from worldwide stations ranging from 30° to 90°, imaged the spatiotemporal variation of the energy radiation sources by means of the nonplane wave array technique using the broadband digital seismic data from a generalized array made up of 33 stations of the Capital Region Digital Seismograph Network （CRDSN）, and obtained the rupture duration times, extents and rupture velocities. Also, we discussed the correlations between the locations of the energy radiation sources of the three events.
基金
the National Natural Science Foundation of China (Grant No. 40474018)
the National Basic Research Project (Grant No. 2004CB418404-4)
the Serious Ocean Disaster Early Warning and Emergency Technique Research (Grant No. 2006BAC03B02)
the Seismic Joint Foundation (Grant Nos. A07047 and 106018)
the Basic R&D Project of Institute of Geophysics, China Earthquake Administration (Grant No. DQJB07B08)
关键词
苏门答腊岛
地震
能量辐射源
测量技术
Sumatra earthquakes
reversal-time imaging technique
non-plane wave array technique
energy radiation sources
