Types of Stress
This force pushes the earth's crust in opposite directions (one up and one down)
Shearing
This measures Ground motion during an earthquake
Seismograph
Island arcs occur when two of this type of plate collide
oceanic
this type of waves produce the most severe ground movements
surface waves
This type of stress results in a folded mountain range
compression
Geologists use the difference in the arrival time of p waves and s waves on a seismograph to determine this
Epicenter
The force that causes magma to erupt at the surface is provided by this
dissolved gases under pressure
This type of wave causes the earth to compress
p waves
Rocks uplifted by this type of fault create fault block mountains
normal faults
This is triggered by earthquakes originating from beneath the ocean floor
Tsunami
An eruption of thin, fluid lava would most likely be this
a quiet eruption
The richter scale measures the size of these
seismic waves
This type of stress makes a strike slip fault
shear
An earthquakes this is located deep underground
focus
Alternating layers of lava and volcanic ash are found in this
composite volcanos
Seismic waves carry energy away from the earthquakes this
focus
This type of stress makes a reverse fault
compression
The mercalli scale measures this
intensity
Thin runny lava usually hardens into this
lava plateaus or sheilds
This type of wave arrives first during an earthquake
p wave