 Loki's wife Sigyn stood by him with a bowl to catch the poison, but whenever she had to empty the bowl the poison dripped on Loki's face, forcing him to jerk his head away and thrash against his bonds, which caused the earth to tremble.In Greek mythology, Poseidon was the cause and god of earthquakes.When he was in a bad mood, he struck the ground with a trident, causing earthquakes and other calamities.