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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Seismic monitoring of effusive-explosive activity and large lava dome collapses during 2013-2015 at Volcan de Colima, Mexico
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Seismic monitoring of effusive-explosive activity and large lava dome collapses during 2013-2015 at Volcan de Colima, Mexico

机译：墨西哥Volcan de Colima火山爆发爆炸活动和大熔岩穹顶塌陷的地震监测（2013-2015年）

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Volcan de Colima, the most active volcano in Mexico, started a new eruptive cycle in January 2013. Since this date, the volcano has presented effusive and explosive activity. The beginning of the cycle was marked by a moderate Vulcanian explosion which had hyperbolical behavior in its precursory seismicity, possibly related to a shallow rupture process. Then, during the whole eruptive stage, the effusive activity was accompanied by low to moderate explosions. The explosions had energies mainly of 106 joules and were located between 0 and 1600 m below the crater, whereas the locations of tremor sources were found to be deeper, reaching up to 3800 m beneath the crater. Very-long-period signals (VLPs) have been observed with Vulcanian explosions that produce pyroclastic flows. A few number of volcano-tectonic events (VTs) were recognized during the studied period (2013-2015), indicating that the volcano is an open system. This was particularly evidenced in July 2015, when a new batch of magma rose rapidly without large precursors, only an accelerated increase in the number of rockfalls and associated RSEM. This event generated two large lava dome collapses with several pulses of material and pyroclastic flows that travelled up to 10.3 km from the summit. The seismic monitoring of Volcan de Colima is currently the only tool in real-time employed to assess the state of the volcanic activity. It is thus necessary to integrate new seismic methods as well as other geophysical monitoring techniques able to detect precursory signals of an impending hazardous event. (C) 2018 Elsevier B.V. All rights reserved.
机译：墨西哥最活跃的火山科利马火山（Volcan de Colima）于2013年1月开始了新的喷发周期。自那时以来，该火山呈现出爆发性和爆炸性活动。循环的开始以中度的瓦肯火山爆发为特征，该火山爆发的先兆地震活动具有双曲线行为，可能与浅破裂过程有关。然后，在整个喷发阶段，喷发活动伴随着低至中等程度的爆炸。爆炸的能量主要为106焦耳，位于火山口下方0至1600 m之间，而震源位置更深，达到火山口下方3800 m。在产生火山碎屑流的伏尔加尼亚爆炸中已经观察到非常长的信号（VLP）。在研究期间（2013-2015年）认识到一些火山构造事件（VTs），表明该火山是一个开放系统。这在2015年7月尤为明显，当时没有大量前兆的情况下，新一批岩浆迅速上升，但落石和相关RSEM的数量仅加速增加。此事件产生了两个大的熔岩穹顶塌陷，其中有数个物质脉冲和火山碎屑流，它们从山顶行进达10.3公里。目前，Volcan de Colima的地震监测是实时用于评估火山活动状态的唯一工具。因此，有必要整合新的地震方法以及其他能够检测即将发生的危险事件的先兆信号的地球物理监测技术。 （C）2018 Elsevier B.V.保留所有权利。

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