Paragraph on “Tremors on the Earth” complete paragraph for Class 9, Class 10, Class 11 and Class 12

Tremors on the Earth

Volcanic eruptions, landslides and movement of the Earth’s crust sends tremors across the surface these tremors are called ‘Earthquakes’. They often result in large Kettle damage to property and, on occasions, life in general. About 60 kms below the Earth’s surface tire the focus points for the earthquakes. The surface above the focus point is called the ‘Epicentre’ Like the Volcanic eruptions, most of the earthquakes occur near the edges of the Crustal plates. It is difficult to forecast earthquakes essentially because they can occur anywhere. Their intensity is however measured with the help of ‘Seismographs’, on a 0 to 9 scale called the ‘Richter scale’, pronounced as ‘Rikter’. Seismographs record the tremors on a running length of paper placed under a sensitive stylus. On some occasions we just feel a slight vibration and the ground tends to move under our feet while on other occasions Earthquakes can develop cracks in the ground and flatten complete cities.