1. Earthquakes Characteristics and Spatial Extent IB Geography
Focus on: Their spatial extent, predictability, frequency, magnitude, duration, speed of onset and effects.

2. Global Tectonic Plate Map

3. Describe the global distribution of earthquakes that have occurred in the last 7 days? [You could get an exam question like this based upon a given map!]

4. Mag 5+ since
Look at the global distribution of earthquakes with a magnitude 5 or
greater that have occurred between Is there any difference between the
observed distribution and the distribution of earthquakes that have occurred in
the last 7 days?

5. Task 2 The following are elements of an earthquake hazard:
Time of earthquake
Date of earthquake
Exact location of epicentre
Fault upon which the quake occurs
The magnitude of the earthquake
The economic impact of the earthquake
The death toll of the earthquake
For each of the elements explain how predictable it is.

6. Task 3
Read the BBC article and highlight the following in different colours:
Locations
Dates
Numbers/Values
Any prediction
Any basis upon which a prediction is made
Any issues with earthquake prediction

8. Something to think about ... earthquake frequency
Are earthquakes becoming more common? Are there any patterns in the two illustration above?

9. Average Frequency Magnitude Average Annually 8 and higher 1 ¹ 7 - 7.9
17 ²
134 ²
1319 ²
13,000 (estimated)
130,000 (estimated)
1,300,000 (estimated)
¹ Based on observations since ² Based on observations since 1990.

10. Essay Question Essay Question (10) Evaluate the statement:
"There were more deaths from earthquakes in the last decade than the one before so earthquakes are becoming more common."

11. Magnitude
Produce notes on the following three scales of magnitude used to measure earthquakes: Richter Scale, Moment Magnitude Scale and the Modified Mercalli Scale.

13. Alaska 1964 – 9.2

16. Asia

18. Chile

20. Power of resultant tsunami