Avalanche was a mutant with seismic wave generation.

Seismokinesis: Avalanche was a mutant with the superhuman ability to generate powerful waves of vibrations from his hands, creating highly destructive effects through the air, water and ground.

The vibrations could cause small inorganic objects to be shatter or crumble into dust. When used upon the earth itself or against large inorganic objects such as buildings these generated vibrations can cause disastrous earthquake-like effects. Avalanche's control over his power was fine enough that he could move large objects, such as tanker trucks, without destroying them and even use them to smoothly throw his opponents off balance or weaken the structural integrity of building foundations or the ground itself. Avalanche could also cause tidal waves when directing his powers at large bodies of water and possibly even tsunamis. His greatest effects could be found when he used his powers on earth matter. When directing his powers at the ground he could cause ground tremors, forming waves of debris, open fissures in the earth, cause chunks of pavement or earth to blast up into the air and then fall in simulated landslides or avalanches. He often used his skills as a means of transportation by using waves of earth matter to ride atop. With enough concentration, Avalanche could direct this power at Earth's tectonic plates to cause large-scale disastrous effects.