Last parasitic eruptions took place around 11.4 million years ago and the youngest radiometric dates are 8.3 million years. As at other volcanoes of Marie Byrd Land, the parasitic activity at Mount Hampton occurred after a long period of dormancy. However, the presence around the caldera rim of snow-covered inactive high ice towers indicate that the mountain is geothermally active and may have erupted during the Holocene. Seismic activity recorded at the volcano may be due to volcano-tectonic processes or due to ice movement.