Earthquakes

An area where no direct seismic waves from a particular earthquake can be detected is called

• an inactive fault zone
• the mesosphere
• a shadow zone
• the atmosphere

What are the fastest body waves?

• P waves
• T waves
• S waves
• Q waves

At what location does the first motion of an earthquake occur

• the focus
• the seismic gap
• the mantle
• the epicenter

How do scientists find the epicenter of an earthquake?

• by comparing arrival times of P waves and S waves at several seismograph stations
• by digging at several locations and comparing data
• by comparing departure times of P waves and S waves at several seismograph stations
• by reviewing satellite photos of tsunamis

What is the epicenter of an earthquake

• the location along a fault where the first motion of an earthquake occurs
• a seismic wave tht travels along the surface of Earth
• the point on Earth's surface directly above the earthquake's focus
• the last place that motion in an earthquake is detected

When seismologist record arrival times of P waves and S waves at several seismograph stations, they are looking for the earthquake's

• magnitude
• intensity
• epicenter
• focus

What is the minimum number of seismograph stations needed to locate an earthquake epicenter?

• 1
• 2
• 3
• 1 billion

One seismograph station, by itself, can determine the

• direction of the epicenter
• location of the epicenter
• distance to the epicenter from the seismograph station
• location of the nearest Papa Johns

The release of energy by an _______________ causes Earth's crust to shake.

• eruption
• earthquake
• tsunami
• shadow wave

Seismographs detect and record_______ waves

• sound
• light
• seismic
• radio