1. Earthquakes
Cornell Notes page 117

2. What is an Earthquake? Shaking or trembling of the Earth’s surface
Creates seismic waves

3. Sudden movements in Earth’s crust
What causes
Earthquakes?
Sudden movements in Earth’s crust
Stress builds up until rock finally breaks
Volcanic activity
Landslides
Nuclear Tests

4. Earthquakes do NOT cause the crust to move- The moving crust causes Earthquakes!!

7. Where do
Earthquakes
usually occur?
Plate boundaries and faults

10. Parts of an Earthquake: Focus
Underground location of event that causes earthquake

11. Earthquake: Epicenter
Parts of an
Earthquake: Epicenter
location of an earthquake on the surface
directly above the focus.

12. What’s the largest Earthquake in the U.S.?
Alaska 115 died-- most deaths due to the tsunami
Shaking was felt earthquake of March 27, It had a magnitude of 9.2.
for an estimated 7 minutes
raised or lowered the ground approx. 56 feet in some places.
length of the ruptured fault was 621 miles.
energy released was equal to 12,000 Hiroshima-type blasts.

14. Largest in World…
Chile (1960)- 9.5