Measuring Earthquakes

When Richter developed his magnitude scale, he based it off a:

• logarithmic scale

• linear scale

• damage level

• fault displacement

Tags

NGSS.MS-ESS3-2

Which scale is based on distance from the epicenter and amplitude:

• Richter

• Modified Mercalli 

• Fujita

• Safir-Simpson

Determine the magnitude of an earthquake that occurs one hundred (100) kilometers away and shows an amplitude of one (1) millimeter:

Determine the magnitude of an earthquake that occurs two hundred (200) kilometers away and shows an amplitude of two (2) millimeters:

Which of the following is NOT a reason why seismologists currently use the Moment Magnitude scale:

• It is the only scale that estimates the size of very large Earthquakes

• Uses the displacement to better reflect the total energy released

• It can be measured both by field studies and seismographic methods

• It is the only method that accurately measures the size of Earthquakes based on the damage.

Which earthquake scale is shown in the picture:

• Richter

• Moment magnitude

• Modified Mercalli

• Fujita

The two scales that are based on earthquake magnitude are:

• Richter

• Modified Mercalli 

• Fujita

• Safir-Simpson

• Moment magnitude

A M8 earthquake releases ________ more energy than a M7 earthquake.

• 30-32 times

• 1000

• 10

• 100

Magnitude measures the amount of ​ (a)   ​ by an Earthquake.

​

• energy released
• damage caused
• Intensity caused
• people impacted

Organize these options into the right categories

Groups:

(a) Magnitude

,

(b) Intensity

• Amount of shaking

• doesn't change with increasing distance

• Richter scale

• 
• 
• Modified Mercalli scale

• Moment magnitude

• Energy

• Damage

• changes with increasing distance