Unit 4 Chapter 4: Earthquake Magnitude Scales

According to the moment magnitude scale, an increase in one integer means _____.

30 times more energy was released by an earthquake

Considering the Moment Magnitude Scale, how much more energy is released in an earthquake of magnitude 8 than a magnitude 6 earthquake?

900 times

Which of these scales are used to measure earthquakes?

All the above

Who created the Richter magnitude scale to measure the intensity of earthquakes?

Charles Richter

Scientists generally use the Mercalli scale to describe the magnitude of an earthquake.

False

The Richter magnitude is calculated from the area of fault that is ruptured and the distance the ground moved along the fault.

False

_____ is a country that has lots of very large earthquakes.

Japan

The scale would be useful if there were no quantitative measures or if data from observations was somehow needed.

Mercalli intense

This scale measures the strength of an earthquake by the damage done.

Mercalli intensity

The Richter scale measures the magnitude of the _____.

largest jolt of energy

The ______ scale measures the magnitude of an earthquake's largest jolt of energy.

Richter

Richter Magnitude Scale was developed by Charles Richter in _____

1935

The Richter scale is _____.

Logarithmic