What are Earthquakes
Most earthquakes occur along the edge of____________
tectonic plates
the epicenter of an earthquake is the point on the Earth's surface _________________
directly above an earthquake's focus
measure of how likely an are is to experience an earthquake
earthquake hazard level
secondary or shear waves
S waves
tracing of an earthquakes motion
seismogram
what kind of deformation leads to earthquakes?
elastic deformation
the STRENGTH (a.k.a. magnitude) of an earthquake is determined by______________
amount of ground motion
one way to predict earthquakes is to observe their past_____________ and ____________
strength and frequency
beginning point of an earthquake
focus
recorder of seismic waves
seismograph
3 types of faults that can lead to earthquakes
normal, reverse, strike-slip
scale used to measure the strength of an earthquake
Richter Scale
name 3 out of 5 technologies used to construct earthquake resistant buildings
cross brace, mass tamper, base isolator, active tendon system, flexible pipes
branch of science that studies earthquakes
seismology
method used to find an earthquakes epicenter
S-P time method
waves of energy from earthquakes that travel through earth are called___________
seismic waves
the INTENSITY of an earthquake is determined by
amount of damage, degree it is felt by people
what should you do if you are in a car during and earthquake
stop car, stay inside it
always the first waves to arrive
P waves
area where few earthquakes have happened but probably will in the future
seismic gap
the change in shape of rock in response to stress
deformation
theory that a major earthquake is likely to occur along a fault line where no earthquakes have occurred recently
gap hypothesis
weaker earthquakes that follow a strong earthquake
aftershocks
snapping back of deformed rock to its previous shape
elastic rebound
shock absorber for seismic waves
mass damper