1. Rāhina, 17 Paenga-whāwhā, 2017Rāhina, 17 Paenga-whāwhā, 2017
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Rāhina, 17 Paenga-whāwhā, 2017Rāhina, 17 Paenga-whāwhā, 2017
Earthquakes are measured on 2 different scales
The Richter Scale – measures the magnitude of the earthquake on a scale of 1 – 10. Each point on the scale is:
10x bigger in size (or amplitude)
30x the energy released
The Mercalli Scale – measures the damage done at a particular location on a scale I – XII
I (not felt) – XII (total destruction)

2. What did the 22nd Feb earthquake measure on the Mercalli scale?
Complete the Mercalli Scale matching game (in groups) to help you…
Write Table 11-1 on the board, to help relate to Richter scale

3. Richter Scale
How much bigger is the amplitude of a magnitude 4.0 earthquake compared to a magnitude 8.0 earthquake?
10 x 10 x 10 x 10 = 10,000 times bigger
How much more energy is released?
30 x 30 x 30 x 30 = 810,000 times the energy
Write Table 11-1 on the board, to help relate to Richter scale

4. Advantages vs Disadvantages?
Richter vs Mercalli!
Advantages vs Disadvantages?
Write Table 11-1 on the board, to help relate to Richter scale
1900 – 1985
1815 – 1914

5. Liquefaction – Demo & Videos

6. Today’s Learning Compare and contrast the Richter and Mercalli Scales
Rāhina, 17 Paenga-whāwhā, 2017
Today’s Learning
Compare and contrast the Richter and Mercalli Scales
Describe the rock cycle
Types of rocks
Processes (e.g. weathering vs erosion)