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Earthquakes
GillExplore Geography - Cyclone Chapter 3
Term | Definition |
---|---|
Focus | The place where an earthquake begins beneath the earth's surface. |
Shock Waves | Also called 'seismics waves'. These spread out in circles from the focus. |
Epicentre | The point at the earth's surface that is directly above the focus of the earthquake. The strength of the earthquake is greatest here. |
Fault | A large crack in the earth's crust. |
An earthquake | Is the sudden shaking of the earth caused by the movement of the earth's crust. |
Seismologists | Scientists who study earthquakes. |
Tsunami | A huge tidal wave that moves quickly towards the shore. |
The San Andreas Fault | A large crack in the earth's crust which marks part of a plate boundary. |
Seismograph | The instrument used to measure and record an earthquake and how long it lasted. |
Richter scale | Used to measure the magnitude of an earthquake from 1-8 |
Moment magnitude scale | Used to measure the magnitude of the earthquake from 1-10. |