Deception Island is an active volcano located in the South Shetland Islands, Antarctica. Although the last eruptions occurred in 1967-1970, the volcano has undergone periods of seismic unrest in 1992, 1999, and 2015. In this work, we analyze continuous seismic data obtained by a permanent station for the period 2008-2015 preceding the 2015 unrest. We identify different types of seismic signals including tectonic and volcano-tectonic (VT) earthquakes and long-period (LP) seismicity, using a combination of visual and automated techniques. The temporal evolution of the seismicity displays three differentiated stages. In Phase 1 (2008-2010) the volcano was in a dormant state characterized by a moderate level of seismicity dominated by low-energy LP seismicity, and very few VT earthquakes. In Phase 2 (2011-2014), there was a gradual increase in the level of LP events and tremor, and an acceleration of the number and energy of VT earthquakes. In Phase 3 (2014-2015) the seismicity reached a climax, with the occurrence of seismic swarms comprising thousands of earthquakes, displaying maximum activity in September-October 2014 and February 2015. We propose that the change from Phase 1 to Phase 2 was due to the recharge of magma into the plumbing system at Moho depths. The emplacement of fresh magma increased the amount of gas (and heat) permeating the volcano edifice, triggering VT earthquakes in brittle regions and favoring the occurrence of LP seismicity in the shallow hydrothermal system. During Phase 2 magma ascended through the plumbing system, as evidenced by the acceleration of the seismicity rates, the detection of thermal anomalies, and a change in the deformation pattern that for 2013-2015 corresponded to an inflation process. Finally, in Phase 3 the magma intrusion reached its shallowest point before stalling at a depth of 6-10 km. The stress perturbations propagated through crustal fluids and produced a distal VT swarm SE of Livingston, as well as proximal VT swarms and very intense LP seismicity at Deception Island.

欺骗岛是位于南极洲南设得兰群岛的一座活火山。虽然最后一次喷发发生在 1967 年至 1970 年，但该火山在 1992 年、1999 年和 2015 年经历了地震动荡时期。在这项工作中，我们分析了在 2015 年动荡之前由一个永久性台站获得的 2008 年至 2015 年期间的连续地震数据. 我们结合使用视觉和自动化技术来识别不同类型的地震信号，包括构造和火山构造 (VT) 地震以及长周期 (LP) 地震活动。地震活动的时间演化呈现出三个不同的阶段。在第一阶段（2008-2010），火山处于休眠状态，其特点是中等水平的地震活动，以低能 LP 地震活动为主，很少发生 VT 地震。在第 2 阶段（2011-2014 年），LP事件和震颤的水平逐渐增加，VT地震的数量和能量加速。在第 3 阶段（2014-2015 年），地震活动达到高潮，发生了数千次地震的地震群，在 2014 年 9 月至 10 月和 2015 年 2 月显示出最大活动。我们建议从第 1 阶段到第 2 阶段的变化是由于将岩浆补给到莫霍深度的管道系统中。新鲜岩浆的就位增加了渗透火山大厦的气体（和热量）量，在脆性地区引发了 VT 地震，并有利于浅水热系统中 LP 地震活动的发生。在第 2 阶段期间，岩浆通过管道系统上升，如地震活动率的加速、热异常的检测所证明的那样，以及 2013-2015 年对应于膨胀过程的变形模式的变化。最后，在第 3 阶段，岩浆侵入达到其最浅点，然后在 6-10 公里深度处停止。应力扰动通过地壳流体传播，并在欺骗岛产生了远端 VT 群 SE，以及近端 VT 群和非常强烈的 LP 地震活动。