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 ...

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.

The intensity of an earthquake is often measured using the Japanese seismic intensity scale, which categorizes tremors from 1 to 7. In this case, the earthquake was classified as a level 3, indicating ...

In this instance, the earthquake's magnitude was recorded at 1.8, a level considered minor and typically not causing significant damage. The maximum intensity of 1 observed in Fukushima indicates that ...

Tsunami advisory issued after new 6.7-magnitude tremor - Details on damage and injuries from the new quake weren't immediately clear ...