Abstract. The little-known Awu volcano (Sangihe Islands, Indonesia) is among the deadliest, with a cumulative death toll of 11 048. In less than 4 centuries, 18 eruptions were recorded, including two VEI 4 and three VEI 3 eruptions with worldwide impacts. The regional geodynamic setting is controlled by a divergent-double-subduction collision and an arc–arc collision. In that context, the slab stalls in the mantle, undergoes an increase in temperature, and becomes prone to melting, a process that sustained the magmatic supply. Awu also has the particularity of hosting alternatively and simultaneously a lava dome and a crater lake throughout its activity. The lava dome passively erupted through the crater lake and induced strong water evaporation from the crater. A conduit plug associated with this dome emplacement subsequently channeled the gas emission to the crater wall. However, with the lava dome cooling, the high annual rainfall eventually reconstituted the crater lake and created a hazardous situation on Awu. Indeed with a new magma injection, rapid pressure buildup may pulverize the conduit plug and the lava dome, allowing lake water injection and subsequent explosive water–magma interaction. The past vigorous eruptions are likely induced by these phenomena, possible scenarios for future events.

中文翻译：

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深入了解驱动阿乌火山的周期性能量喷发，这是地球上最致命的火山之一

摘要。鲜为人知的阿乌火山（印度尼西亚桑吉赫群岛）是最致命的火山之一，累计死亡人数为 11 048 人。在不到 4 个世纪的时间里，记录了 18 次喷发，其中包括两次 VEI 4 喷发和三次 VEI 3 喷发，具有全球影响。区域地球动力学环境受发散双俯冲碰撞和弧弧碰撞控制。在这种情况下，板块在地幔中停滞，温度升高，变得容易熔化，这一过程维持了岩浆供应。Awu 还具有在其整个活动过程中交替并同时举办熔岩穹顶和火山口湖的特殊性。熔岩穹顶通过火山口湖被动喷发，并引起火山口的强烈水分蒸发。与此圆顶安置相关联的导管塞随后将气体排放引导至火山口壁。然而，随着熔岩穹顶的冷却，每年的高降雨量最终重新构成了火山口湖，并在阿乌造成了危险的局面。事实上，随着新的岩浆注入，快速的压力积累可能会粉碎导管塞和熔岩穹顶，从而使湖水注入和随后的水-岩浆爆炸性相互作用。过去的猛烈喷发很可能是由这些现象引起的，这些现象是未来事件的可能情景。允许湖水注入和随后的爆炸性水-岩浆相互作用。过去的猛烈喷发很可能是由这些现象引起的，这些现象是未来事件的可能情景。允许湖水注入和随后的爆炸性水-岩浆相互作用。过去的猛烈喷发很可能是由这些现象引起的，这些现象是未来事件的可能情景。