The Moho is the boundary between the Earth’s crust and the mantle. It was discovered because P-waves traveling through the deeper mantle arrive at distant stations faster than those traveling through the shallower crust. This indicates that the mantle is ...
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The Richter and Moment Magnitude scales are logarithmic. Each increase of one magnitude releases about 32 times more energy. From magnitude 6.0 to 8.0 is a two-step increase, so the energy released is 32 × 32 = 1,024 times more. ...
Liquefaction occurs when intense shaking causes the water pressure between soil particles to increase. This causes the soil to lose its strength and act like a liquid. Buildings on such soil may tilt, sink or collapse as the foundation literally ...
Love waves (L-waves) are surface waves that move the ground in a horizontal, shearing motion. They do not have a vertical component. This side-to-side shaking is particularly destructive to buildings because most structures are designed to handle vertical gravity loads ...
P-waves slow down significantly when entering the liquid outer core from the solid mantle. This sudden velocity drop causes the waves to bend (refract) toward the center of the Earth. This bending creates a “gap” on the surface between 103° ...