# Measuring and Precting Earthquakes

Earthquake prediction: a science on shaky ground
10:56 — by Physics World

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## Key Questions

The seismograph and the seismoscope are the main tools to measure earthquakes.

#### Explanation:

The seismograph measures the time that the earthquake takes place.The seismoscope measures the motion of the earth when the earthquake takes place.

• The Richter scale, was developed by Charles F. Richter in 1934. It used a formula based on amplitude of the largest wave recorded on a specific type of siemometer

• The Richter magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismograph
• The ritcher scale is logarithmatic,which means an increase in a level (for e.g 4th level to 5th level)on the Richter scale corresponds to 10 times the increase in amplitude on siemograph ,which corresponds to an increase of 31.6 times the energy relased in the lessor/previous level

because they have to study deep beneath the earth digging hole or tunnel to study earthquake in detail and going very deep is not possible at present days.

#### Explanation:

to study detail and to predict earthquake scientists have to go deep beneath earth by digging hole or tunnel. the problem is they cannot go that deep in the earths crust because of extreme temperature and pressure and they cannot study the phenomenon in detail as a result scientist cannot predict the earthquake.

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