Measurments Of Magnitude And Intensity

Question 1

What is the Modified Mercalli Scale (MMS)?

Answer 1

A scale that measures the intensity of an earthquake based on observed effects.

Question 2

What does a MMS I indicate?

Answer 2

Not felt.

Question 3

What does a MMS II indicate?

Answer 3

Felt by persons at rest, on upper floors, or favorably placed.

Question 4

What does a MMS III indicate?

Answer 4

Felt indoors. Vibration like passing of light trucks.

Question 5

What does a MMS IV indicate?

Answer 5

Vibration like passing of heavy trucks.

Question 6

What does a MMS V indicate?

Answer 6

Felt outdoors. Small unstable objects displaced or upset.

Question 7

What does a MMS VI indicate?

Answer 7

Felt by all. Furniture moved. Weak plaster/masonry cracks.

Question 8

What does a MMS VII indicate?

Answer 8

Difficult to stand. Damage to masonry and chimneys.

Question 9

What does a MMS VIII indicate?

Answer 9

Partial collapse of masonry. Frame houses moved.

Question 10

What does a MMS IX indicate?

Answer 10

Masonry seriously damaged or destroyed.

Question 11

What does a MMS X indicate?

Answer 11

Many buildings and bridges destroyed.

Question 12

What does a MMS XI indicate?

Answer 12

Rails bent greatly, pipelines severely damaged.

Question 13

What does a MMS XII indicate?

Answer 13

Damage nearly total.

Question 14

What does MEI stand for?

Answer 14

Mathematics in Education and Industry.

Question 15

What does the MMS scale measure?

Answer 15

The amount of energy released by an earthquake.

Question 16

How much more powerful is a MMS 7 earthquake than a MMS 5 one?

Answer 16

63,000,000,000,000,000,000,000 times more powerful.

Question 17

What is the Volcanic Explosivity Index (VEI)?

Answer 17

A scale that describes the size of explosive volcanic eruptions.

Question 18

What is the volume of erupted tephra for a VEI of 0?

Answer 18

0.00001 km³.

Question 19

What is the volume of erupted tephra for a VEI of 1?

Answer 19

0.001 km³.

Question 20

What is the volume of erupted tephra for a VEI of 2?

Answer 20

0.01 km³.

Question 21

What is the volume of erupted tephra for a VEI of 3?

Answer 21

0.1 km³.

Question 22

What is the volume of erupted tephra for a VEI of 4?

Answer 22

1 km³.

Question 23

What is the volume of erupted tephra for a VEI of 5?

Answer 23

10 km³.

Question 24

What is the volume of erupted tephra for a VEI of 6?

Answer 24

100 km³.

Question 25

What is the volume of erupted tephra for a VEI of 7?

Answer 25

Greater than 100 km³.

Question 26

What are the advantages of the Modified Mercalli Scale?

Answer 26

Provides a more meaningful measure of severity to non-scientists.

Question 27

What are the disadvantages of the Modified Mercalli Scale?

Answer 27

Mostly based on opinion, no set scale, and depends on surroundings.

Question 28

What is the Moment Magnitude Scale (MMS)?

Answer 28

A developed version of the magnitude scale based on the local moment release.

Question 29

What are the advantages of the Moment Magnitude Scale?

Answer 29

Works over a wider range of earthquake sizes and is applicable globally.

Question 30

What are the disadvantages of the Moment Magnitude Scale?

Answer 30

Not effective for measuring small earthquakes and less accurate for extremely large or distant earthquakes.

Question 31

What are the advantages of the Volcanic Explosivity Index (VEI)?

Answer 31

Valuable in predicting the impact of volcanoes.

Question 32

What are the disadvantages of the Volcanic Explosivity Index (VEI)?

Answer 32

Not useful for effusive eruptions and difficulty in measuring the actual volume of pyroclastic materials.