I Felt by very few people; barely noticeable. II Felt by a few people, especially on upper floors. III Noticeable indoors, especially on upper floors, but may not be recognized as an earthquake. IV ...

A 2.8 magnitude earthquake struck central Virginia on Tuesday afternoon, the United States Geological Survey reported. The ...

Another way to measure the strength of an earthquake is to use the observations of the people who experienced the earthquake, and the amount of damage that occurred, to estimate its intensity. The ...

The quake had an intensity of IV on the Modified Mercalli Intensity Scale – strong enough to wobble cars and rattle windows, with a sensation like a “heavy truck hitting building,” according ...

The researchers concluded that shaking below IV on the Modified Mercalli Intensity Scale—corresponding to "light" shaking usually felt indoors but not always outside—has a negligible effect on ...