Research by a team of international scientists in 2006 revealed that the Santorini event was much larger than the original estimate of of dense-rock equivalent (DRE) that was published in 1991. With an estimated DRE in excess of , the volume of ejecta was approximately . If so, the eruption's Volcanic Explosivity Index was 7. The volcano ejected up to four times as much as the well-recorded eruption by Krakatoa in 1883. The Thera volcanic events and subsequent ashfall probably destroyed all indigenous life, as occurred on Krakatoa. Only the Mount Tambora volcanic eruption of 1815, Mount Samalas eruption of 1257, Lake Taupo's Hatepe eruption around 180 CE, and perhaps the Paektu Mountain eruption of 946 CE released more material into the atmosphere during historic times.