This document discusses evidence from ancient texts and locations that a massive tsunami may have impacted the region long ago.
1) Ancient texts describe a group called the Sagaras who encountered a horse thief and were destroyed by a sage's glance, turning them to ashes. Their ashes were later revived by the Ganges river. This matches geographic features found in California and nearby islands.
2) Another text describes a great flood during which only one mound remained above water, where Shiva appeared. This matches the location of the Vasishteswaraswamy temple in Thanjavur.
3) Several temples contain imagery and legends referring to a past pralaya (destruction) by flooding, and