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Why can s waves not be detected everywhere on earth after an earthquake?
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Which type of seismic wave can be detected on the opposite side of earth from an earthquake?
P-waves as they are able to travel through the liquid outer core of the earth, where as S-waves are not.
An area where no direct seismic waves from a particular earthquake can be detected?
shadow zone
What are waves generated by an earthquake that travel through earth or along its surface?
These are known as seismic waves.
What does the shadow zone have to do with earthquakes?
This is caused by the density variations in the earth which cause the velocity of seismic waves to change as they move between them which in turn causes refraction of the waves. Further to this, the earth's outer core is a liquid which prevents seismic S-waves from travelling through it. This leads to a zone on the opposite side of the earth from an earthquake where S-waves are not detected.
What are the waves generated by an earthquake?
the crust of the earth is swithching over each other
What is shadow zones?
An area on Earth's surface where no direct seismic waves from a particular earthquake can be detected.
Which type of seismic wave can be detected on the opposite side of earth from an earthquake?
P-waves as they are able to travel through the liquid outer core of the earth, where as S-waves are not.
What are earthquake waves?
vibration that travels through earth carrying the energy released during an earthquake.
Which type of seismic waves cannot be detected on the side of Earth opposite an earthquake?
The type of wave that cannot be detected on the other side of Earth is a secondary wave also known as a s wave
An area where no direct seismic waves from a particular earthquake can be detected?
shadow zone
When an earthquake occurs which types of wave will be detected first?
P-waves.
What evidence do we have that Earth's outer core is molten?
There are two types of seismic body waves that travel through the earth when an earthquake occurs. P-waves and S-waves. When an earthquake occurs it has been observed that there is a zone at the opposite side of the earth where P-waves are detected but S-waves are not. S-waves are not able to travel through liquids where as P-waves can and as such it is believed that the shadow zone is caused by the presence of a liquid outer core.
What is the medium for earthquake waves.?
Earth is the medium for earthquake waves.
Which are always the first waves of an earthquake to be detected?
P waves (primary waves) - the fastest, and can travel through solids liquids or gasses
How do you locate where an earthquake starts?
There is a network of seismometers (earth-quake detectors) setup around the world. When an earthquake occurs it releases a set of powerful waves which travel through the Earth and are detected by the seismometers. By comparing the time taken to reach each seismometer the epicentre of the earthquake can be triangulated.
What is the observation you get from the earthquake waves?
The study of the behaviour of earthquake waves provides accurate information about the Earth's structure.
Why S waves cannot be detected on the side of Earth opposite an earthquake.?
All waves are at the whim of the medium in which they travel, and the earth's molten iron core is a difficult one for seismic waves to travel through. The vibrations either bounce off or become to broken up by the intense heat and pressure.
