Deception Island (South Shetland Islands, Antarctica) is an active volcano characterized by a moderate level of seismic activity, dominated by long-period seismicity related to hydrothermal processes in a shallow aquifer. Nevertheless, in the last few decades the volcano has undergone at least three episodes of seismic unrest, in 1992, 1999, and 2015. During these episodes, the pattern of seismicity changed, and swarms of volcano-tectonic earthquakes with hundreds of events in time spans of a few months were detected. These episodes are interpreted as consequences of magmatic intrusions. However, the seismic series display significant differences that lead us to think that the processes initiating the series are not exactly the same in all cases. The 1999 series comprised mostly small-magnitude earthquakes, produced regularly during 1.5 months, and located at shallow depths (<4 km) within the caldera, mostly along a WSW-ENE trend that parallels the Bransfield rift. No precursory seismic activity was reported, and a few months after the series onset the seismicity was back to normal levels. The 2015 series included earthquakes with larger magnitudes, occurring during 5 months in temporal clusters separated by aseismic periods. They were located at deeper levels (<10 km) with epicenters distributed all around Deception Island, at distances up to 30 km. Additionally, distal (~35 km) VT seismicity was reported SE of Livingston Island months before the 2015 series onset, and the seismicity at Deception Island remained anomalously high during a few years. Taking into account the limited data available for the 1992 unrest, we conclude that the 1992 and 1999 series were produced by shallow, short-lived, small-volume (~4·10⁴ m³) intrusions that affected the shallowmost part of the volcanic edifice. On the contrary, the 2015 series was consequence of a deep, long-lasting intrusion that involved a larger volume of ~5·10⁶ m³ (in the range of a VEI 2 eruption) and modified the stress field of the whole volcanic edifice.

欺骗岛（南极洲南设得兰群岛）是一座活火山，其特征是中等水平的地震活动，主要是与浅层含水层中的热液过程相关的长周期地震活动。尽管如此，在过去的几十年里，火山在 1992 年、1999 年和 2015 年至少经历了 3 次地震动荡。 在这些事件中，地震活动的模式发生了变化，火山构造地震群在时间上发生了数百次事件几个月的跨度被发现。这些事件被解释为岩浆侵入的后果。然而，地震序列显示出显着差异，导致我们认为启动序列的过程并非在所有情况下都完全相同。1999 年系列主要包括在 1.5 个月内定期发生的小震级地震，并且位于火山口内的浅层（<4 公里），主要沿着与布兰斯菲尔德裂谷平行的 WSW-ENE 趋势。没有报告前兆地震活动，并且在系列开始后几个月地震活动恢复到正常水平。2015 年系列包括震级较大的地震，发生在 5 个月内，发生在由抗震期分隔的时间集群中。它们位于更深的层次（<10 公里），震中分布在欺骗岛周围，距离最远可达 30 公里。此外，在 2015 年系列开始前几个月，利文斯顿岛东南部报告了远端（~35 公里）VT 地震活动，欺骗岛的地震活动在几年内保持异常高。考虑到 1992 年动乱的有限数据，⁴ m ³ ) 影响火山结构最浅部分的侵入体。相反，2015 系列是深而持久的侵入的结果，涉及更大体积的~5·10 ⁶ m ³（在 VEI 2 喷发范围内）并修改了整个火山建筑物的应力场.