"Earthquakes generate elastic waves when one block of material slides against another; the break between the two blocks being called a fault. Explosions generate elastic waves by an impulsive change in volume in the material. Small explosive charges are used in controlled-source seismic experiments in which the waves penetrate only a few kilometres into the earth."
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University of Cambridge alumniFellows of the Royal SocietyAcademics from the United KingdomPhysicists from EnglandGeologists from England
Original Language: English
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(p. 12)
https://en.wikiquote.org/wiki/David_Gubbins
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David Gubbins
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