A tsunami saved the Greek village of Potidaea from Persian invaders in winter 479 BC, a US study said Thursday, warning that the area remains prone to earthquakes.

New geological evidence suggests that the region could still face tsunami events like the one that drowned hundreds of Persian invaders as they lay siege to the ancient Greek village many centuries ago, according to Klaus Reicherter of Aachen University in Germany and his colleagues.

Sediment on the northern Greek peninsula where Potidaea, and its modern counterpart Nea Potidea, is located showed signs of massive marine events, such as large waves, the study said.

And excavations in the suburbs of the ancient city of Mende nearby uncovered a high-energy level dating back to the fifth century BC that contained far older sea shells likely plucked from the ocean bed and tossed about during a tsunami.

The event was previously described by Greek historian Herodotus.

Reicherter said the study's findings suggested that the Thermaic Gulf where the peninsula is located -- a densely populated area that is also a tourist destination -- should be included in Greece's tsunami-prone regions.

He was due to present his research Thursday at the Annual Meeting of the Seismological Society of America in San Diego, California.