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 ...

VANCOUVER, B.C. (KOMO) — The North Pacific by British Columbia's Vancouver Island was rattled by a series of earthquakes Thursday morning, the largest quake measured as 6.4 magnitude. According to the ...

Earthquake tremors have been felt again in Afghanistan. Its intensity has been recorded at 5.3 on the Richter scale. According to India's National Center for Seismology (NCS), the tremors were felt at ...

Pasadena, Calif.'s City Hall is seen Monday. Ryan Sun/AP When the 4.4-magnitude earthquake struck the Los Angeles area Monday afternoon, Angelenos reported a lengthy quake with significant shaking.

(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 ...

Earthquakes are measured using seismographs, which monitor the seismic waves that travel through the Earth after an earthquake strikes. Scientists used the Richter Scale for many years but now largely ...