That scale is based on the intensity of the quake, or how you or a building would experience it, Alexandra Hatem, a research geologist at the USGS who worked on the U.S. National Seismic Hazard ...

According to CBS, the reason is that the Earth's crust over this region is much older, colder, and more healed versus out west which is far more seismically active. But when a quake does occur here, ...

Nearly 2,200 earthquakes strong enough to be felt by humans have recently struck around a southwestern Japanese island chain.

The Richter scale measures magnitude, whereas the MMI scale measures intensity. Here are the magnitude classes, according to the California Earthquake Authority: 3.0 – 3.9. Minor, may be felt. 4 ...

Seismic Intensity (a.k.a. shindo) measures the degree of shaking at a certain point on the earth's surface as a number. The bigger the number, the bigger the tremor. This scale is used only in ...

Monday marks one month since seismic activity intensified in the sea around the Tokara island chain in southwestern Japan, ...

The temblor occurred at 7.57 p.m. local time, measuring lower 5 on the Japanese seismic intensity scale of 7, said the Japan Meteorological Agency (JMA).

Residents of the Tokara Islands in the village of Toshima, Kagoshima Prefecture, began evacuating Friday morning following a powerful magnitude 5.5 earthquake that struck a day earlier, which ...