Earthquakes

Question 1

What is the main cause of an earthquake?

Revolt · Accepted Answer

stress caused by plate movement

Question 2

✔ P waveS wavesurface wave

Revolt · Accepted Answer

P wave

Question 3

P waveS wave✔ surface wave

Revolt · Accepted Answer

surface wave

Question 4

Fill in the blank to complete each statement about measuring an earthquake’s magnitude. The scale is best used to measure the strength of small, nearby earthquakes. The magnitude scale is useful for measuring the strength of earthquakes of all sizes and at all distances from a seismograph.

Revolt · Accepted Answer

Part 1: Richter; Part 2: moment

Question 5

P wave✔ S wavesurface wave

Revolt · Accepted Answer

S wave

Question 6

When earthquakes produce vibrations called waves, how do those waves travel?

Revolt · Accepted Answer

They travel away from the focus of the earthquake in all directions.

Question 7

Which statement about the Mercalli scale is true?

Revolt · Accepted Answer

The scale rates an earthquake according to how much damage it causes.

Question 8

How do geologists determine the location of an earthquake's epicenter?

Revolt · Accepted Answer

By using seismograph data to triangulate the distance from multiple seismic stations.

Question 9

Based on the seismograph measurements in the image, where is the epicenter of this earthquake?

Revolt · Accepted Answer

San Francisco, CA

Earthquakes Answers

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