The earthquake that hit the Tohoku region of Japan on March 11, 2011, had a magnitude of 9.0 and killed over 15000 people.
Steel, reinforced concrete and wood are good building materials for an earthquake resistant house because they flex somewhat without breaking. Family homes built completely out of brick are not as safe because they can break apart easily.
An earthquake can trigger a volcano to erupt.
You would feel the ground shake in a magnitude 3 quake.