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Seismic Wave Transmission

1956
When an earthquake occurs, energy, which may reach the order of 1025 ergs in the greatest earthquakes is released, within a few seconds or less, from a focal region inside the Earth whose linear dimensions may be of the order of several kilometres. The (somewhat indefinite) centre of the focal region is called the focus.
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Seismic waves and seismic barriers

Acoustical Physics, 2011
The basic idea of seismic barrier is to protect an area occupied by a building or a group of buildings from seismic waves. Depending on nature of seismic waves that are most probable in a specific region, different kinds of seismic barriers are suggested.
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SEISMIC WAVE PROPAGATION

GEOPHYSICS, 1950
Speculations are made regarding the significance of the well‐known observation that seismic reflection energy is usually in the frequency range of from 20 to 100 cycles per second. The general absence of reflected energy below 20 cps is attributed to the fact that the wavelengths of seismic waves in this frequency range are becoming large compared to ...
D. H. Clewell, R. F. Simon
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Seismic Wave Propagation

1983
Seismic wave propagation is founded on the principles and laws of classical physics: Hooke’s law relating stress and strain, the theory of elasticity, the principles of conservation of energy and momentum, Newton’s laws of motion, and the wave equation.
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Seismic Waves

2022
Gino Segrè, John Stack
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On Seismic Waves

Seismological Research Letters, 1939
Gutenberg, B., Richter, C. F.
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