Earthquake Concepts and Terminology

What is the point beneath the earth's surface where an earthquake begins called?

• Hypocenter

• Epicenter

• Fault plane

• Seismogram

What are the smaller tremors that occur before the main earthquake called?

• Foreshocks

• Aftershocks

• Mainshocks

• Seismic waves

Which layers of the Earth form the tectonic plates?

• Crust and upper mantle

• Inner core and outer core

• Mantle and outer core

• Crust and inner core

What instrument is used to record earthquakes?

• Seismograph

• Barometer

• Thermometer

• Anemometer

What is the purpose of the USGS's 'Did You Feel It?' program?

• To collect data from people who experienced an earthquake

• To predict future earthquakes

• To measure the magnitude of earthquakes

• To provide real-time notifications