Earthquake Flashcards
the movement of earth’s crust
Earthquake
is the study of earthquake
seismology
people who study earthquake
seismologists
a point on earth’s surface. Where the shaking is the strongest and most damage occurs
epicenter
point below earth’s surface where the rock breaks along the fault and energy is released
focus
What are the three types of movement?
Normal fault
Reverse fault
strike-slip fault
a region on earth’s surface that is broken into two piecesN
Fault
what are the two types of earthquake?
Tectonic earthquake
Volcanic earthquake
occurs when two tectonic plates move suddenly against each other
Tectonic earthquake
Occurs in areas near volcanoes
Volcanic earthquake
It is the energy produced by an eathquake
Seismic waves
What is P waves?
primary
arrives first
move with a push-pull
What is S waves?
secondary
arrives second
move with a side-to-side motion
what is surface waves?
slowest
most damage
measures the magnitude of an earthquake
seismograph
is the energy released by an earthquake
magnitude
Magnitude is measured using?
Richter scale
is used to describe the strength of an earthquake
Richter magnitude scale
is a measure of how much damage on earthquake has caused in the surface
Intensity
shaking is measured using
modified mercalli scale
use I-XII to describe the rate of an earthquake
modified mercalli scale
a big solid rock composed of continental and oceanic lithosphere
Tectonic plate
a process in which one edge of the plate is forced down below another plate
Subduct