earthquakes are caused by the movement of tectonic plates. earthquakes in wellington
TRANSCRIPT
Earthquakes are caused by themovement of tectonic plates.
Earthquakes in Wellington
What are Tectonic PlatesThis is an image of the earth's different layers.●Inner core
●Outer core
●Lower mantle
●Transition region
●Shallow mantle*
●Crust and Lithosphere
*The shallow mantle is divided into parts these parts are the tectonic plates
Tectonic Boundaries
How Earthquakes Occur
Australian Pacific
● Two plates such as the Pacific and Australian pushing towards each other create tension causing one of the plates to crack.
● Earthquakes happen in these faults because it is weaker at that point so it releases the tension there. The result, earthquakes.
NZ Plate Boundaries
Plate edge
Wellington/ Wairarapa faults
Australian plate
Pacific plate(sinking)
Earthquakes on Richter scale
Location Magnitude DateEdgecumbe 6.6 1984San Francisco 7.8 19061855 Wairarapa 8.2 1855Sumatra 9.3 2004
Some earthquakes in the last 151 years
Earthquake Energies Compared
Edgecumbe San Francisco 1855 Wairarapa
Sumatra0
100
200
300
400
500
600
Earthquake energy
Edgecumbe EarthquakeCaused this damage
Special thanks
Wikipidia.org
Wellington public libraries
Google.co.nz/images
KNS Libraries