Talk:High Seism/@comment-88.42.101.250-20130628083503/@comment-23878607-20141024130257

More likely it's from the Greek σεισμός seismos, which is a word used in Herodotus.

According to Greek mythology, Poseidon Earthshaker was the hand that brought earthquakes, though he was primarily god of the sea. If he struck the ground with the end of his trident, the earth trembled and shook.