An earthquake can occur with the middle of an ocean being the “epicenter”. There is some shifting of matter which might be why you are feeling a similarity between the two.

An avalanche is a large mass of snow, ice, etc., detached from a mountain slope that ends up sliding or falling suddenly downward. An earthquake is a series of vibrations induced in the earth’s crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating. Hope that helps! I’m the best answer! LOL I also have a question for you even though you’re asking for help and it’s probably homework, why do people post answers as “Do your own homework!” That’s stupid! I hope my answer helps you!