Earth Science Ch. 6: Earthquakes

What would be a reasonable Richter scale equivalent for a Mercalli score of XI?

Which is another term for secondary waves?

The most widely used intensity scale in the US is the

the paper record of seismic waves

A seismograph is an instrument that records the motion, magnitude, and _____ of seismic waves.

A seismograph is an instrument that records the ________, magnitude, and time of seismic waves.

The intensity values for an earthquake depend on the distance from the epicenter and the local

an instrument used to record and measure ground movements

If an earthquake with a Mercalli rating of VIII hit a town, what would you expect to see?

seismic waves that travel at the surface

a fracture where rocks can slip

waves of energy produced at the focus of an earthquake

shearing waves with particle motion perpendicular to wave propagation

What is another name for a seismic sea wave?

A rubber band can model elastic energy because

Which type of seismic wave is recorded first on a seismograph?

energy stored as a change in shape

The three kinds of seismic waves in order from fastest to slowest are:

Scientists can use this when looking at a seismogram to analyze the height of the seismic waves

When an earthquake hits, a building's damage depends most on its

What is one warning sign of a tsunami?

Most scientists today use the _____ scale, which measures the energy released by an earthquake.

A seismograph is an instrument that records the motion, _____, and time of seismic waves.

sudden movement of rocks along a fault

Which instrument is useful in measuring the magnitude of an earthquake?

Each increase of one number on the Richter scale represents a _____ increase in ground shaking.

If a seismograph is far from the epicenter,

How many seismograph recordings are needed to locate the epicenter of an earthquake?

An earthquake is started by

Which best models elastic strain?

an instrument used to record and measure ground movement caused by seismic waves

What is one difficulty with the Richter magnitude scale?

Surface waves cause the most damage because

Which illustrates the motion of an S-wave?

Scientists locate the epicenter of an earthquake through

compressional waves with particle motion in the same direction as wave propagation

Which is the most widely used intensity scale in the United States?

Which describes the energy flow leading to an earthquake?

the point on Earth's surface directly above the focus

a relative measure of the amount of energy released by an earthquake

A seismogram is a record of the arrival times of the

Where does the towering wave on a tsunami form?