A Level Geography - Tectonics Questions
With reference to earthquake (seismic) waves, explain two reasons why it is difficult for buildings to remain intact during an earthquake. (4 marks) One reason why it may be difficult for buildings to stay up during an earthquake is the secondary love waves, which moves side to side. These waves can be very damaging to the foundations of structures because of their movement, making buildings fall as their bases can no longer support this weight above. A second reason which causes buildings to collapse during earthquakes is the damage that primary seismic waves can do. They move away from the source of the earthquake, pushing and pulling rock. This can cause soil to compress, making the ground fully saturated with water. The soil becomes weaker and so may not be able to support the buildings above it, thus making them fall. Explain the link between plate boundary type and the strength of the earthquake (seismic) waves. (6 marks) The strength of an earthquake can d...