Causes of Tectonic Hazards (Edexcel A-Level Geography): Flashcards
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Cause of earthquakes
Cause of earthquakes
Sudden movements near Earth's surface along a fault
P wave characteristics
P wave characteristics
Arrives first, very fast, moves through solid rock & fluids, push/pull motion
S wave characteristics
S wave characteristics
Slower than P, only through solid rock, up & down movement
Most destructive earthquake waves
Most destructive earthquake waves
S and L waves (larger amplitude & energy force)
Definition of liquefaction
Definition of liquefaction
Shockwaves shake loose unconsolidated material, making it act like a fluid
Pyroclastic flow speed
Pyroclastic flow speed
Up to 700 km/h
Pyroclastic flow temperature
Pyroclastic flow temperature
Up to 1000°C
Volcanic gas causing most deaths
Volcanic gas causing most deaths
CO₂
Lahar speed
Lahar speed
60 km/h
Tsunami wave timing pattern
Tsunami wave timing pattern
Occur in waves minutes apart, sometimes hours apart