Seismic S-waves Can Travel Through Earth's Liquid Outer Core.
Seismic waves
Earthquakes produce shockwaves called seismic waves. These waves tin be detected using seismographs. Some seismic waves are surface waves, while others tin can travel through the Earth.
P and Due south waves' paths through Earth
The speed of P waves and Due south waves increases every bit they travel deeper into the Earth's curtain .
They travel through the World in curved paths, but they change direction suddenly when they pass through the boundary betwixt substances in different states.
The diagrams show what happens when P waves and S waves pass through the Earth.
P waves
- Longitudinal
- Fast moving
- Travel through liquids and solids
S waves
- Transverse
- Slower moving than P waves
- Travel through solids simply
Due south waves cannot laissez passer through the liquid outer core, but P waves tin can. The waves are refracted as they travel through the Globe due to a modify in density of the medium. This causes the waves to travel in curved paths. When the waves cantankerous the boundary between ii different layers, at that place is a sudden change in direction due to refraction.
- Question
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Compare the backdrop of P waves, S waves and surface seismic waves.
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A surface wave travels along the surface of the Earth. Information technology is the slowest of the three types of seismic wave. Surface waves unremarkably take larger aamplitude than the other waves and crusade the most harm.
A P wave is a longitudinal moving ridge and travels the fastest. It can travel through solids and liquids.
An South moving ridge is a transverse moving ridge and travels slower than a P wave, thus arriving after the P wave. Due south waves tin only travel through solids, and every bit a result practise not travel through the liquid core of the Globe.
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Source: https://www.bbc.co.uk/bitesize/guides/zswkjty/revision/3
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