1. Notes 11
Earthquake Magnitude

2. Earthquake Strength & Intensity
Magnitude..
The strength of an earthquake
Depends on amount of crustal movement
Depends on the depth below the surface
Earth Quake Damage: The most damage from earthquakes…
Earthquakes that have greater magnitudes
Places that are close to the epicenter

3. Earthquake Strength & Intensity
Richter Scale – measure of an earthquake's magnitude
Uses a number value to represent size of seismic waves
Each whole number= 10x change in strength
No upper limit on the scale
Doesn’t measure high magnitude earthquakes very well
Doesn’t give a good indication of damage or danger

4. Richter Scale
Each number represents a magnitude 10x greater than previous number.

5. Earthquake Strength & Intensity
Mercalli Scale - rate earthquakes according to the level of damage at a given place
Magnitude values range from I – XII
Higher intensity= more damage

6. Mercalli Scale
Rate earthquakes according to the level of damage at a given place. ( I – XII)

7. Seismograph
A Seismograph detects and measures intensity of the earthquake
A Record of an earthquake is a seismogram

8. Tsunamis – “Tidal Wave”
Tsunami - a large water wave caused by an under sea earthquake.
When an earthquake jolts the ocean floor, plate movement causes the ocean floor to rise slightly and push water out of its way.
Tsunamis

9. That’s it !! Let’s go home….