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 Felt by many indoors, few outdoors. May feel ...

A moderately strong, 5.1-magnitude earthquake struck in Australia on Wednesday, according to the United States Geological ...

There are a number of ways to measure the magnitude of an earthquake. Most scales are based on the amplitude of seismic waves recorded on seismometers. These scales account for the distance between ...

Although the Richter Scale laid the foundation for modern seismology, it is no longer the primary tool scientists use to report an earthquake’s magnitude. Today, researchers use more advanced ...

A 7.7-magnitude earthquake caused casualties and damage across Myanmar and in parts of Thailand(Photo: by Lauren DeCicca/Getty Images) The quake happened in central Myanmar at a depth of 6.2 miles ...