Question

1. What causes earthquake
2. Name the instrument used to record earthquakes Mention two causes of earthquakes.
3. What are the effects of earthquakes?
4. Give three examples of earthquakes indicate two major belts of earthquakes
5. What do you mean by the epicentre of an earthquake?
6. Distinguish between Seismic Focus and Epicentre​

Answer 1

Explanation:

1.An earthquake is caused by a sudden slip on a fault. ... When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel. In California there are two plates - the Pacific Plate and the North American Plate.

2

Answer 2

Explanation:

1. The movement of tectonic plates below the earth causes earthquake.

2. Richter Scale.

Two causes of earthquake are Human activities and volcano eruption.

3. The effects from earthquakes include ground shaking, surface faulting, ground failure, and less commonly, tsunamis.

4. The three examples of earthquakes are as follows. Three major seismic belts around the world are the Pacific seismic belt also referred to as the Ring of Fire, the Alpine-Himalayan seismic belt, and finally the Mid-ocean Ridge seismic belt.

5. The epicenter is the point on the earth's surface vertically above the hypocenter (or focus), point in the crust where the earthquake begins.

6. Epicenter is the location on the surface of the Earth directly above where the earthquake starts. Focus is the location in the Earth where the earthquake starts.