Earthquakes and seismic activity often happen with sudden movements underground with tectonic plates. Seismographs are used by scientists to measure the time, location and strength of an earthquake.

(WHTM) — Residents in Pennsylvania felt shaking Friday morning as a 4.8 magnitude earthquake struck New Jersey. Earthquake reported in New Jersey, tremors felt in Pennsylvania One of the most commonly ...

TEHAMA COUNTY, CA - According to the U.S. Geological Survey, a preliminary 2.8 magnitude quake rattled near Manton Wednesday ...

GOLDEN, Colo. (CBS4)- It's a complicated formula for calculating the severity of earthquakes. But we get it… kind of. Still, it has generally served us well: 5.4, 6.2, 8.0, 9.1. You get the point.

(WHTM) – Residents along much of the East Coast felt shaking Friday morning as an earthquake struck New Jersey. One of the most commonly known earthquake-measuring tools is the Richter Scale, but the ...

Shortly after it occurred, scientists said there was a slight chance Monday’s magnitude-4.4 earthquake in Los Angeles may have been a “foreshock” of a bigger one yet to come. That’s obviously getting ...

An earthquake measuring 4.6 on the Richter Scale struck Papua New Guinea on Wednesday. The earthquake's epicenter was located ...

An earthquake measuring 4.8 on the Richter scale struck Chile on Tuesday. The US Geological Survey (USGS) reported that the ...

(WHTM) – Residents along much of the East Coast felt shaking Friday morning as a 4.8 magnitude earthquake struck New Jersey. One of the most commonly known earthquake-measuring tools is the Richter ...