Finding the Epicenter

What method do seismologists use in locating an epicenter?

• Focus Group Discussion

• Interview

• Observation

• Triangulation

Where is the epicenter for this earthquake located based on triangulation?

• A

• B

• C

• D

Tags

NGSS.MS-ESS3-2

As the distance from the epicenter decreases, the time interval between the arrival of the P-waves and the S-waves on the seismograph will _________________

• decrease

• increase

• remain the same

• zero

Which of the statements best describes the relationship between lag time and distance from epicenter? 

• The longer the lag time, the closer the distance.

• The longer the lag time, the farther the distance. 

• The shorter the lag time, the farther the distance. 

• There is no relationship. 

What is the epicenter distance if the difference between P- and S-waves is 4 minutes 30 seconds? Your answer should be in km, don't forget to multiply by 1000.

How many seismograph stations are used to triangulate the epicenter?

• 1

• 2

• 3

• 4

Which seismic station is closest to the epicenter of the earthquake?

• A

• B

• C

Which seismic station has the biggest difference in the P wave arrival time and the S wave arrival time?

• X

• Y

• Z

How can you tell that location X is closest to the epicenter of the earthquake?

• It has the biggest circle

• It has the smallest circle

• It is a circle on the map

• It is located near the top right corner

Tags

NGSS.MS-ESS3-2

Which letter represents the epicenter of the earthquake?

• A

• F

• G

• D

Tags

NGSS.MS-ESS3-2