Please enable JavaScript.
Coggle requires JavaScript to display documents.
Unit 1, Chapter 1: Locations at risk from tectonic hazards (What causes…
Unit 1, Chapter 1: Locations at risk from tectonic hazards
-
-
-
-
-
-
Different plate margins
Convergent (also known as destructive/collision) - where two plates collide/are moving towards each other.
-
Transform (also known as conservative) - where two plates and sliding past each other, they can either be going in different directions or the same direction but different speeds.
-
Earthquakes, crustal fracturing and ground shaking
-
-
Seismic waves
A seismometer measures the amount of ground shaking during an earthquake, recording both the vertical and horizontal movements of the ground. Analysis of the data shows that an earthquake produces different seismic waves.
-
Secondary (S) waves - move slower, however, at around 4 km/sec. Vibrations are at right angles to the direction of travel and cannot travel through liquids.
Love (L) waves or Q waves - surface waves with the vibration occurring in the horizontal plain. High amplitude.
-