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与危地马拉圣地亚古多火山喷发相关的地震成因很复杂。不同时间尺度的岩石破裂、流体运移、气体膨胀会引发各种地表运动,包括静态和动态的变形及气压扰动等。详细分析如此复杂的事件可通过测震及附加的其他手段完成,譬如次声、大地测量和可视化监测等。该火山区2009年1月4日的一次爆炸喷发事件前就监测到明显的排气活动、地面倾斜以及地震次声的谐波颤动。这次爆炸事件引起了地表的穹顶隆起、多种爆发脉冲以及随后火山体倾斜导致的再次平衡。本文采用多种手段监测分析圣地亚古多火山的溢流和爆炸活动这一物理过程,并对发生的复合地震进行解析。
The origin of the earthquake associated with the ancient Guadalupe Guatemala eruption is complex. Rock fractures, fluid migration and gas expansion at different time scales lead to various kinds of surface movement, including static and dynamic deformation and atmospheric pressure disturbances. Detailed analysis of such complex events can be accomplished by seismometric and additional means, such as infrasound, geodesy and visual monitoring. The volcanic area detected significant exhaust activity, ground tilt and harmonic vibrations of the infrasound following an explosion eruption on January 4, 2009. The explosion caused a dome doming on the earth’s surface, a variety of bursts of pulses and the subsequent rebalancing caused by volcanic tilt. In this paper, we use a variety of means to monitor and analyze the physical processes of overflow and explosion in the San Diego Duraton and analyze the complex earthquakes.