the point beneath where rock breaks under stress and causes an earthquake.
the point on Earth's surface directly above an earthquake's focus.
seismic wave that compress and expands the ground, first waves to arrive. these go through solids and liquids
seismic wave that vibrates side to side and up and down. second to arrive, only goes through solids.
formed when p waves and s waves reach the surface. slowest, but most devastating. only on the surface
records the ground movements caused by seismic waves as they move through the Earth
isolated base system
a house or building that is put on bearings that absorb the the vibrations during an earth quake. this method of protection is designed to reduce the energy that reaches a building during an earthquake
place where risk of earthquakes is the highest
The San Andres fault in California, has the highest chance of earthquakes. this is so because this is where the Pacific and North American plate collide