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.

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 ...

The earthquake occurred at a depth of 6.2 miles and had an estimated intensity of VI on the modified Mercalli intensity scale ...

An earthquake measuring 2.1 on the Richter scale was felt on Wednesday night in municipalities in the districts of Porto and ...