Vocab
any kind of shaking of the ground measurable by seismic instruments
earthquake
this stress is the most dangerous, or most likely to cause an earthquake
shear
When a rock cracks but does NOT move, it is called this
a joint
the fastest body wave
P wave
the earthquake scale to measure magnitude
Richter scale
the angle of a fault
dip
these instruments measure earthquake waves
seismometer(s)
the horizontal direction of a fault
strike
the last wave to reach the seismic station; the most destructive
surface
a source of danger or harm
an upward force on a less dense object in a denser material
buoyant force
The San Andreas fault is this kind of tectonic plate boundary
transform
If a fault’s motion is parallel to its dip (up and down), then it is called this
dip-slip fault
seismometers are installed in these places
seismic stations
The Modified Mercalli scale measures or rates an earthquake's this, which is related to how destructive it is
intensity
the spot on the earth’s surface directly above the focus.
epicenter
If a rock is elastic, it can absorb energy and return to its original shape without breaking. If a rock is this, then it can deform a good deal before breaking.
ductile/ductility
secondary earthquakes
aftershocks
the seismic wave that cannot pass through a liquid
S wave
Broken gas lines or electrical lines can result in this major earthquake hazard
fire (explosion)
this is a measure of how much damage is done by an earthquake
intensity
This place uses the Quake Catcher Network to give early earthquake warnings
California
If two tectonic plates cannot move easily or at all, we would say the fault is this
locked
You need 3 seismic stations to triangulate the location of an earthquake's this
epicenter
an area that has not had an earthquake in a while may be in this kind of area along a fault
seismic gap