Earthquakes were the domain of Poseidon. This is probably because for a people who lived primarily near the water, earthquakes would invariably be followed by tidal waves.
Poseidon is called the Earthshaker because he is the god of the sea in Greek mythology, and his power is believed to cause earthquakes. As the ruler of the oceans and seas, his fierce temper and ability to create storms and earthquakes were seen as manifestations of his power to shake the earth.
In Greek mythology, Poseidon was said to use his trident to cause rough seas and earthquakes. The trident was a powerful weapon associated with his control over the sea and its elements. When Poseidon struck the ground with his trident, it was believed to have caused the earth to shake and trigger earthquakes.
poseidon, the god of the sea, shook the earth when he was angry, therefore he was called the earthshaker.
To create rough seas or earthquakes, Poseidon thrusts his trident into the seas or into the ground.
They wouldn't have called them tsunamis because that's a Japanese word, but any tidal waves and their usual cause, earthquakes, would have been blamed on Poseidon.
Cause the greek were the ones that invented it
lotus
Pan
Poseidon is called the "earth shaker" because of his power to cause earthquakes and tsunamis by wielding his trident. In Greek mythology, he is often associated with the sea, storms, and the power to shake the earth with his might.
Because in that time it was all they believed, so it was not "mythology". Also, the city-states of Greece were so separated they reffered to themselves as "Spartans" or "Minoans" not "Greeks". Im not Gunna erase The Questioneers work cause its cool but The meaning of mythology means not real Greeks never belived it to be mythology because it was their religon. If you are catholic would you think the stuff in the bible was all myths?
In the ancient Greek religion, Poseidon was the brother of the chief god, Zeus, and the second most powerful of the gods. As god of the seas, he had the power to help seafarers or cause their ships to sink. He also had the power to make earthquakes and cause havoc on land. So, it would be a very foolhardy person who did not worship Poseidon.
Sailors feared Poseidon, because they believed him to be the cause of earthquakes.