In 2009, Richard W. Welch contended that Atlantis had been on the Tore Seamount, a circular, volcano-like feature 100 km in diameter with its summit at 2200 meters water depth and a small, 5000 meter deep basin in its interior. Tore sits in the Atlantic Ocean between Portugal and the Azores. Welch theorizes it is the remains of a supervolcano that erupted circa 1640 BCE. The survivors of Atlantis then spread out as far as Sardinia and became one of the bands of Sea Peoples that wrought chaos in the Eastern Mediterranean in the 2nd millennium BCE.
Welch's theory hinges on a mechanism he calls geopulsation, in which changes in the Earth's rotation cause an increase in volcanic activity.
The Tore Seamount is a circular geomorphological feature in the Atlantic Ocean at 39º03´N, 12º35´W, 300km west of Lisbon, Portugal.
When Tore was first discovered, three prevailing theories on its origin emerged; that it was a volcanic caldera, an impact crater, or that it could be the result of random tectonic stresses.
The most recent analysis of the Tore Seamount from 2012, actually points to it being an impact crater.