richter scale

  • Measures magnitude of earthquakes (strength and force)

  • 1935 - Charles Richter

  • Measured on seismometer and shown on a seismograph

  • Logarithmic - each point is 10 times stronger than before e.g 6.0 is 10 times stronger than 5.0

mercalli scale

  • Measures intensity of earthquakes 

  • 1906 - Giuseppe Mercalli

  • Measured by effects on man made structures and the environment

  • Effects may be different with distance from earthquake

 

 
 

task

  1. Draw a labelled diagram of a shield and composite volcano. Explain how they are formed by reading p 80.

  2. Explain how the Richter and Mercalli scales are similar and different (compare and contrast) by completing a Venn diagram. Use the information above.

  3. Illustrate the different impacts on the Mercalli scale storyboard by drawing pictures.