About 55 earthquakes a day – 20,000 a year – are recorded by the National Earthquake Information Center. Most are tiny and barely noticed by people living where they happen. But some are strong enough ...

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 ...

The U.S. Geological Survey (USGS) crowdsourcing platform Did You Feel It? (DYFI) rapidly transforms people's earthquake ...

(CNN) — Measuring earthquakes is no easy task, given they strike suddenly and sometimes at global scale. When the Earth’s crust shifts abruptly, an earthquake occurs, with energy radiated out as ...