The Sandwich plate (SW) is located in the Scotia Sea in the southern Atlantic at the junction of the Antarctic (AN), Scotia (SC), and South America (SA) plates (Figure 1). It is confined by the East Scotia Spreading Ridge (ESR) to the west, strike-slip segments to the north and the south, and the westward subduction of the SA plate with a rate of 62-72 mm/yr at the South Sandwich Trench (SST) to the east (e.g.,
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