6:15 PM - 7:30 PM
[SVC12-P03] Recent seismic volcanic activity at Deception Island volcano (Shetland Islands, Antarctica).
Keywords:seismic array, seismic network, volcano seismology, Shetland Islands, Antarctica
In this work we analyze the results of the last two Antarctic campaigns conducted by the Spanish research team (2013-2014 and 2014-2015). Although seismic volcanic activity remained at relatively low levels in the 2013-2014 campaign, a notable increase has been observed in the current campaign (the highest number of LP/VT events in one day is 1500/100). In this paper we will be discussing the initial results obtained from our analysis of the data, focusing our attention on particular periods of intense LP and VT activity.
These variations may be related to alterations in the shallow hydrothermal system of Deception Island. In some periods VT distributions are temporally and spatially homogeneous, with a generally low level of seismicity in certain specific particular areas. These patterns may be caused by different processes, involving regional stresses and local tectonic destabilization induced by volcanic activity. We investigated how these events may have influenced volcano dynamics. Overall, this study suggests that there has been a significant reactivation of the volcano since the 2013-2014 Antarctic campaign.