What Causes Seismic Waves?

Answer

Seismic waves are caused by earthquakes. The earthquakes must occur underneath or near the ocean, be large and create movements in the sea floor to generate the seismic wave. They can be caused by submarine landslides or infrequently by submarine volcanic eruptions and rarely by the impact of a large meteorite in the ocean.
Q&A Related to "What Causes Seismic Waves"
Seismic waves are mostly caused by earthquakes, although they can also be created by explosions - something that is mainly used in geological research.
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Seismic waves cause back & forth, side-to-side, & up & down motions in the earth, which
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When an earthquake takes place on the ocean floor, it causes displacement of a large volume of sea water thus creating huge sea waves also known as 'Tsunami' Tsunami (a Japanese word
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For more information on seismic wave, visit Britannica.com.
http://www.answers.com/topic/seismic-wave
1 Additional Answer
Seismic waves are formed from sound waves that radiate outward when an earthquake ruptures. There are two types of wave activity. They are Compressional waves and P waves. You can find more information here: http://www.seismo.unr.edu/ftp/pub/louie/class/100/seismic-waves.html
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