Geiger


Geiger : A commonly used method to determine the hypocenter and the origin time of an earthquake or any other seismic source by using arrival times of seismic waves, assuming the knowledge of their travel-times within the Earth. Geiger (1910) applied the Gauss-Newton method (a linearized least squares fit algorithm) to solve the earthquake location problem, but his method was not practical until the advance of computers in the late 1950s. See linearize, IS 11.1in this Manual, Lahr (2003), Klein (2003), Lee et al. (2003b), Lee and Stewart (1981, p. 132-139), and the biographies of Ludwig Geiger, Karl Friedrich Gauss, and Isaac Newton in Howell (2003)
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