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10 Cards in this Set

  • Front
  • Back
Any ______ in the Earth's surface is considered an earthquake.
vibration
We don't feel most earthquakes because they are so ______.
tiny
The point in the lithosphere where the continental plates slip is called the ______ of the earthquake.
focus
The ______ is the point on the Earth's surface directly above the focus.
epicenter
Vibrations called ______ ______ travel upward and outward from the focus. (two words)
seismic waves
When the continental plates stop moving, rocks resettle along the fault line, causing ______.
aftershocks
The ______ scale, a method of measuring earthquakes, is based on the amount of energy produced at the focus of an earthquake.
Richter
The Richter scale uses a ______, a pendulum-type instrument that measures surface vibrations.
seismometer
Scientists who study earthquakes are called ______.
seismologists
Another scale for measuring earthquakes is called the ______ scale and is based on eyewitness accounts.
Mercalli