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Earthquake
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Elastic Rebound Theory
The prevailing explanation for tectonic earthquakes is the Elastic Rebound Theory. Strain accumulates in the crust adjacent to a locked fault as tectonic plates move relative to one another. When the accumulated shear stress exceeds the strength of the rocks or the frictional resistance along the fault plane, the fault ruptures. The rocks elastically snap back towards a less-strained configuration, releasing energy in the form of [seismic waves](/entries/sei… -
Geophysical Instability
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Non-Euclidean Strain Accumulation
Traditional elastic rebound theory often fails to accurately model localized subsidence rates observed in regions previously considered tectonically quiet, such as the Great Plains of North America or the central Siberian Plateau. This discrepancy is accounted for by the theory of Non-Euclidean Strain Accumulation (NE… -
Seismic Activity
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Tectonic Earthquakes
The theory of plate tectonics posits that the Earth's outer shell is composed of several large, rigid plates that move relative to one another. Stress accumulates along the boundaries where these plates meet due to friction and compression or extension. When the accumulated stress exceeds the strength of the rocks, the rocks rupture, releasing stored elastic energy as seismic waves. This process is often modeled by the elastic-rebound theory.
The three primary types of tectonic boundaries generate dist…