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Ebba Hoeger

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How far does a secondary wave travel in 10 minutes?

Secondary waves, also known as S-waves, travel at about 3.7 km/s through the Earth's crust and mantle. In 10 minutes, a secondary wave would travel approximately 22,200 kilometers.


Are primary seismic waves slower than secondary waves?

Primary waves are called so because they are the first to arrive, and secondary waves are called so because they arrive second. Based on this logic I would say no. There is in fact a marked difference, which is used to tell how far away the epicenter is from a particular seismograph.


What is the difference between a primary wave and a secondary wave?

Primary seismic waves (also called P-waves) are a type of ground motion most commonly associated with earthquakes, though the waves are also caused by large explosions (nuclear tests) and would be expected from an asteroid impact. For a primary seismic wave, the motion of the ground is caused by a series of compressions and decompressions in which the ground at any point is moving on an axis which passes through the epicenter, while each individual wave front is spherical around the epicenter. Since solids (such as rock) are not readily compressible by significant amounts, the vibratory movement is very slight and the wave travels very rapidly. As a consequence, P-waves travel faster than Secondary waves (S-waves) also generated by the same seismic event. Consequently, P-waves are the source of the deep rumbling sound which can be heard at the beginning of an earthquake just before the far more destructive S-waves arrive.


A person located twice as far from the epicenter of an earthquake as another person will notice tat the time between the arrival of the primary and secondary waves will be?

Twice as long. The interval between the arrival of the primary and secondary waves doubles with every doubling of the distance from the epicenter due to the different velocities of the waves.


What is the arrival of p waves and s waves?

S waves travel only through solids, they are known as shear waves and their motion is perpendicular to the direction of travel.If the direction of motion is to the right, the wave would move up and down.P waves an move through both solids and liquids, their motion is parallel to the direction of travel.If the motion is to the right the wave will compress and decompress towards the right.