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.

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 ...

For each whole number increase in magnitude, the seismic energy released increases by about 32 times. That means a magnitude 7 earthquake produces 32 times more energy — or is 32 times stronger — than ...

BERKELEY (KRON) – With the recent earthquakes in California last week, now may be a good time to not only spruce up your emergency preparedness kit, but to also brush up on earthquake terminology!

When measuring an earthquake, you'll often hear terms like magnitude and intensity used interchangeably, but they actually have different definitions. Hunters Andrew Porter and Ian Stasko were ...

Magnitude 4.8 earthquake strikes Pangasinan on 10 January 2026. Intensity IV shaking in Bani; tremor felt across northern ...