Buildings tremble throughout. Hanging objects swing considerably. Small objects are shifted. Doors and windows swing open or shut. Slightly damaging Many people are frightened and run outdoors.
Some objects fall.
Damaging Most people are frightened and run outdoors. Furniture is shifted and objects fall from shelves in large numbers. Heavily damaging Many people find it difficult to stand. Many houses have large cracks in walls. A few well built ordinary buildings show serious failure of walls, while weak older structures may collapse.