Earthquakes and Tsunamis

What are the two main types of seismic waves?

• P and S waves

• L and R waves

• Primary and Secondary waves

• Rayleigh and Love waves

What is the breaking point of an earthquake called?

• Epicentre

• Hypocentre

• Focus

• Seismic shockwave

Which type of seismic wave causes the most damage?

• Primary waves

• Secondary waves

• Love waves

• Rayleigh waves

What is the main cause of tsunamis?

• Tides

• Wind

• Seismic activity

• Meteor strikes

What is the wave height of a tsunami in open water?

• Less than 1 m

• 1-5 m

• 5-10 m

• Over 25 m

How fast can tsunamis travel?

• 100-200 km per hour

• 200-400 km per hour

• 400-600 km per hour

• 640-960 km per hour

What is the wavelength of a tsunami in open water?

• Less than 100 km

• 100-500 km

• 500-1000 km

• Over 1000 km

Where are most tsunamis associated with seismicity?

• Atlantic Ocean

• Indian Ocean

• Pacific Ocean

• Arctic Ocean

What is the first sign of a tsunami approaching the coast?

• Drawdown

• Massive wall of water

• Rising sea level

• Strong winds

What percentage of the world's earthquakes occur along or near tectonic plate margins?

• 50%

• 75%

• 90%

• 95%