EARTHQUAKES

• Earthquakes -sudden shaking of the earth caused by the movement of the crust.
• Tremors -vibration.
• Focus- the point under the surface where the earthquake happens.
• Faultline -the line of two plates.
• Epicentre - the point on the surface directly above the focus. The earthquake is the strongest here.
• Seismic waves -waves of tremors.
• Aftershock- smaller tremors that come after the earthquakes.
• Seismologist - a person who studies earthquakes
• Seismographs - an instrument that measures the strength of an earthquake.
• Richter scale - measures the strength of an earthquake .it goes from 1-8
• Moment Magnitude Scale (MMS) - measures the strength of an earthquake. It has now replaced the Richter scale.

HOW DOES AN EARTHQUAKE HAPPEN.

1. Two plates collide/ sliding with each other.
2. There is a huge build-up of pressure from the two plates.
3. There is a huge release of pressure.
4. The earthquake takes place.
5. Massive damage begins to take place on the epicentre.
6. Aftershocks begin to come.