= H. F. Reid
{c}
<H. F. Reid> developed the <elastic-rebound theory> of <earthquakes> from deformation associated with the 1906 California earthquake. The theory connects slow accumulation of elastic strain with sudden <fault slip> and release of stored energy.<Reid's Elastic Rebound Theory by United States Geological Survey>[Surface-displacement observations and the elastic-rebound interpretation]{ref}
An offset marker records displacement during rupture, while measurements spread over a broader region reveal the preceding deformation. These are complementary observations: the final offset alone does not describe the full volume of <rock> that stored elastic energy before the event.
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