How earthquakes are measured

The vibrations made by earthquake are measured by a seismograph. This is then measured on the Richter Scale, which tells us how strong the earthquake is. Each recording is 10 times bigger than the next, for example a eaathquake measured 6 is ten times bigger than an earthquake measured 5 on the Richter Scale. An earthquake measured 2 on the Richter is usally the smallest earthquake felt by humans, and an earthquake measured 6 is thought to be a major eathquake. Severe earthquakes measure 8 or more on the Richter Scale.