Question

3. Seismograph, Raingauge, Epicentre, Mercall scale​

Answer 1

Explanation:

1. seismograph - the instrument used to measure earthquake waves or

seismic waves is a seismograph or seismometer.

2. epicentre - the point on the earth surface vertically above the focus

is called the epicentre of the earthquake.

3. mercall scale - The Modified Mercalli intensity scale, descended from

Giuseppe Mercalli's Mercalli intensity scale of 1902, is a

seismic intensity scale used for measuring the intensity

of shaking produced by an earthquake.

4.rainguage - a device for collecting and measuring the amount of rain

which falls.