Chapter 12 Definitons Flashcards
An instrument that records vibrations in the ground
Seismograph
A magnitude scale that measures ground motion
Richter scale
the sudden return of elastically deformed rock to its undeformed shape
Elastic rebound
a seismic wave that travels through the body of a medium
Body wave
measurement of earthquake strength.
Moment magnitude
a seismic wave that travels along the surface of a medium and that has a stronger effect near the surface of the medium than it has in the interior
Surface wave
expresses intensity in Roman numerals from I to XII and provides a description of the effects of each earthquake intensity.
Modified Mercalli Scale
a primary wave, or compression wave; a seismic wave that causes particles of rock to move in a back-and-forth direction parallel to the direction in which the wave is traveling
P wave
are the second-fastest seismic waves and can only travel through solids.
S wave
an area on Earth’s surface where no direct seismic waves from a particular earthquake can be detected
Shadow zone
A tracing of earthquake motion that is recorded by a seismograph.
Seismogram
