what is a earthquake
what is a earthquake?
shaking of earth's crust caused by a release of energy.
what is focus?
the point at which the rock first breaks
what is an another name for a primary wave?
p-wave
what is a surface wave?
when P and S waves reach the surface they make surface waves
triangulation
what causes a earthquake?
eruption of a volcano
collapse of cavern
impact of a merteorite
strain between plates
what is the epicenter?
directly above the focus
what is another name for secondary wave?
s-wave
what are the 2 types of surface waves?
love and rayleigh
what is the richter scale?
strength of a earthquake, increases x10 each number up
what are the types of volcanoes that causes a earthquake?
cinder cone
shield volcano
composite
what does the focus lay?
below the surface
what is the fastest wave?
primary wave
what is a seismogram?
instrument used to measure a earthquake
what are the hazards of a earthquake?
fire, liquefaction , and tsunamis
what is a cavern?
a cave
what does the epicenter lay?
directly above the surface
what is a secondary wave? (characteristics)
side to side movement, only travels through solid material, half the speed of P waves
what is the S-P time interval?
time between the start of a P wave and S wave
what is a earthquake magnitude?
strength measured by the amount of energy released
what is a fault?
a break in the lithosphere along which movement has occurred
what is the order of epicenter, focus, and fault?
focus (farthest down), fault (in the middle), epicenter
what can a primary wave travel through?
any material: solid, liquid, and gases
what is a seismogram?
paper record of earthquake data
who invented the richter scale?
charles richter