Magnitude scales can be used to describe earthquakes so small that they are expressed in negative numbers. The scale also has no upper limit. Learn more about how we measure earthquake magnitude.

A moderately strong, 5.7-magnitude earthquake struck in the Philippines on Thursday, according to the United States ...

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 strong, 6.8-magnitude earthquake struck off the coast of southern Japan on Monday, according to the United States ...