If it hits the ice on which we are standing, it will cause a wave that will shatter the ice beneath us.

As to the direction, most people look to their right first and this would cause the wave to travel in a clockwise direction.

However, the gravitational disruptions caused by such an event could cause a wave of star formation to move through the larger galaxy.

Since a slow wave radiates at discontinuities, the periodic modulations (discontinuities) cause the wave to radiate continuously along the length of the structure.

The depolarization and contraction together cause a wave of movement to pass through the heart muscle.