Upload
rachael-hubbard
View
1.491
Download
3
Tags:
Embed Size (px)
Citation preview
EARTHQUAKES
IMPORTANT TERMS
• Seismology:– The study of
earthquakes…seismo means “shake”
• Fault:– A break in the Earth’s
crust – formed from stress
from tectonic forces
• Stress: – Any push or pull on the Earth’s crust– Causes deformation
Plastic Deformation
• Rocks bend like molded clay• Does NOT cause
earthquakes
• Deformation:– The change in the shape of rock in response to
stress
Elastic Deformation• Rock bends until it breaks
• Elastic rebound• Rock snaps back into
original shape• This causes earthquakes
Point inside the earth where an earthquake begins
The point on the Earth’s surface…directly above the focus