EARTHQUAKES

JACK BUFFINGTON&

CARTER TRONE

Pangea

• How many original supercontinents were there?

• There was only one.• It was called Pangea.

• Pangea

Plate tectonics

What major plates affect the united states?

The North American plate, the Pacific plate, and the Juan de Fuca plate all effect the United States.

• Plate Tectonics of the U.S.A

HAZARD MAP

• Why do you think California has more earthquakes than Florida?

• In what hazard zone are you located?

• I think it is because California is on a fault line and Florida is not.

• We have a 2-4 chance of having a earthquake.

BIGGEST EARTHQUAKE

• What was the biggest earthquake in history?

• Shaanxi China earthquake was the biggest.

• It happened in Shaanxi China and it was a magnitude 8 earthquake.

• 830,000 people died.• It happened on

01/23/1556

• Shaanxi China earthquake

PLATE BOUNDARIES

• What are the three kind of plate boundaries?

• There are divergent boundaries that move apart and lets magma flow through.

• There are convergent boundaries that push together and one pushes up and the other moves down.

• There are also transform boundaries they rub together when they move.

• Three types of plate boundaries

• Divergent

• Convergent

• transform

TSUNAMIS

• What are tsunamis?• What causes them and how

fast do they travel?

• A large wave• They are caused by

earthquakes and underwater volcanoes.

• They move at 500mp (800km) per hour

• tsunami

ENERGYWAVES

Seismic waves • What are the two types of energy waves.

• How do they differ?• Which waves travel faster?• They are the primary and

secondary seismic waves.• They differ because the

primary waves is stronger than the secondary waves. The primary wave travels faster

MAGNITUDE

• How much more energy is released by a 7.2 earthquake than an 6.2 earthquake?

• It released 32x the amount of energy

SEISMOLOGY

• What applications does seismology have besides measuring the magnitude of earthquakes?

• It can be used in geophysical exploration to locate layers of density.

• They use it to find oil.• It can also be used to show

the interior of the earth and its structure.

LAST WEEKS EARTHQUAKES

• Where did most of the earthquakes happen last week?

• They happened in Hatie.

SCIENTISTS

• Can scientists predict earthquakes?

• No, but they can get a pretty good guess where they are going to happen.

• They can tell because of plate tectonics.

SCIENTISTS

• How do scientists know where an earthquake actually occurred?

• They use machines called seismographs

THANKS FOR WATCHING

By JACK BUFFINGTON&

CARTER TRONE