Results 171 to 180 of about 3,196,310 (243)
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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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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, 2011The 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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Simulating seismic wave propagation in 3D elastic media using staggered-grid finite differences
Bulletin of The Seismological Society of America (BSSA), 1996This article provides an overview of the application of the staggered-grid finite-difference technique to model wave propagation problems in 3D elastic media. In addition to presenting generalized, discrete representations of the differential equations
R. Graves
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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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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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Newly formed craters on Mars located using seismic and acoustic wave data from InSight
Nature Geoscience, 2022R. Garcia +38 more
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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 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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The Journal of the Acoustical Society of America, 1985
A seismic wave generator and method of using it, which comprises a vertical array of sources at known spacings, for detonation in a seismic wave propagating medium of known seismic velocity; means to initiate the sources in time sequence in a selected series of known different time intervals and recording the seismic waves at a distant location to ...
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A seismic wave generator and method of using it, which comprises a vertical array of sources at known spacings, for detonation in a seismic wave propagating medium of known seismic velocity; means to initiate the sources in time sequence in a selected series of known different time intervals and recording the seismic waves at a distant location to ...
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