An earthquake rattled much of the Northeast on Friday morning, with shaking felt across the New York City metropolitan area and in communities from Baltimore and Philadelphia up through New England.

Earthquake strength is registered on the moment magnitude scale, which measures how much energy was released when the rocks along a fault moved during the quake. By Henry Fountain Earthquake strength ...

(WHTM) — April 26 is the birthday of Seismologist Charles Richter, co-creator with Beno Gutenberg of the Richter Scale, which measures the intensity of earthquakes. In the early 1930s, the field of ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. (WHTM) – Residents along much of the East ...

A California Geological Survey map released earlier this year depicts just how intense and damaging the shaking from future earthquakes will be across the state, revealing where the threat is most ...