



Hm, most phenomena of nature are controlled by the pegasi, whether its the rain from the clouds, or twisters in the sky. Yet things like earthquakes, volcanoes, and other forces of nature that caused by the movement of the tectonic plates are likely beyond their control. Given the tone of the show, however, these forces must be controlled by SOMEONE. Maybe Earth ponies, when they all converge along a fault line? Or maybe some type of underground creature?

Derpy, just fly up, and maybe carry a filly or two with you. The earthquake won't harm you then.