1. Earthquakes
By Donny Qualters

2. What is an earthquake?
 An earthquake is used to describe a sudden slip on
a fault, and as a result the ground shaking and
radiating seismic energy caused by the slip
 Caused by volcanic activity,
 Caused by other sudden stress changes in the
earth.

3. What causes earthquakes?
 Earthquakes are caused when tectonic plates
move past each other causing stress.

4. How do earthquakes form?
 Earthquakes are formed by the
movement of the Earth's plates. When a
plate squeezes or stretches too much,
huge rocks are formed at the edges, and
these rocks can move with a lot of force,
which causes an earthquake.

5. Parts of an earthquake
 The two major parts of an earthquake are
the epicenter and the focus
 Focus – The point inside the Earth where
an earthquake begins
 Epicenter – The point on Earth’s surface
above the focus

6. Most destructive Earthquake
 The Great San Francisco Earthquake of
1906 was the most destructive earthquake
as it caused $524 million in damage and
killed 3,000 people.

7. How are earthquakes
measured?
 Earthquakes are measured by the Richter
scale

8. Question
 What causes earthquakes?
A- The epicenter and the focus
B- The mantle
C- When tectonic plates move past each
other causing stress.

9. Question
 What was the most destructive
earthquake?
A- The Great San Francisco Earthquake
B- The Haiti earthquake
C- Chile Earthquake

10. Question
 How are earthquakes measured?
A- Richter scale
B- Mercalli scale
C- Interval scale

11. The End
 Thanks for watching!