Earthquake Triangulation

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. 

How many seismograph stations are used to triangulate the epicenter?

• 1

• 2

• 3

• 4

You were provided with data showing the arrival time of the P and S waves recorded from three seismic stations. Which of these can you possibly determine?

• the damage at the focus

• the distance to the earthquake

• the intensity of the earthquake

• the location of the epicenter

From the seismogram, the distance to the epicenter can be determined by measuring _____________.

• the arrival time of surface wave

• the difference in the arrival times of the P and S waves.

• the ratio of the amplitude of the largest P and S waves.

• . the speed of the surface wave.

What is the distance of the epicenter from a certain recording station if the difference in arrival time of P and S waves is 1 minute in 10 seconds?

• 850 km

• 875 km

• 900 km

• 925 km

Tags

NGSS.MS-PS4-2

What is the wave that can travel through the earth’s inner layer?

• Body wave

• primary wave

• seismic wave

• secondary wave

Tags

NGSS.MS-PS4-2

Locating earthquake epicenter is important because it will pinpoint________.

• fault line

• focus

• plate boundary

• another epicenter

Tags

NGSS.MS-ESS2-3