How did the moon form?
an asteroid hit the earth and gauged out a chunk of rock that became our moon.
the moon was always there in the beginning
the earth broke in two
a nearby planet began orbiting the earth and became the moon.

The amount of damage that results from an earthquake depends on its intensity and duration, the type of ground on which structures are built, and the design of the buildings in the area, time of day the earthquake begins, electromagnetic property of area rocks, speed of the tsunami warning system.