Go to:    Intensity I-IV RATING DESCRIPTION I. Not felt except by a very few. II. Felt only by a few persons at rest, especially on upper floors of buildings. III. Felt quite noticeably by people indoors, especially on upper floors of buildings. Many people do not recognize it as an earthquake. Parked vehicles may rock slightly. Vibrations similar to a truck passing. IV. Felt indoors by many, outdoors by a few. At night, some awakened. Dishes, windows, doors disturbed; walls make cracking sound. Sensation like heavy truck striking building. Vehicles rock noticeably.