Earthquakes Flashcards
(5 cards)
1
Q
What is the focus
A
The centre of the earthquake, where it starts
2
Q
What is the epicentre
A
Directly above the focus, on the surface of the earth
3
Q
Richter scale
A
10 logarithmic scale measured on a seismometer
4
Q
Magnitude
A
Strength of the earthquake
5
Q
Describe how an earthquake happens
A
Tectonic plates locked by friction
Pressure builds up due to movement in the mantle
Tectonic plates move
Rock breaks on focus, pressure released
Seismic waves travel on surface
There is an earthquake
There are aftershocks
