Figure 1: Maps of Deception Island showing the regional tectonic setting and locations of sites relevant to this study.

(top) Location of Deception Island plotted in a regional framework and showing nearest plate boundaries and observed regional rift areas (a). The box shows the location of Deception Island (b). (bottom) The shape of Deception Island with the locations of recent volcanic eruptions (dates shown inside black boxes), the main scientific stations and bases (in blue), and some of the geographical sites cited in the text.