NEHRP Clearinghouse

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• Helmberger, D. V.; Harkrider, D. G.
  Modeling Earthquakes with Generalized Ray Theory.
  Air Force Office of Scientific Research, Bolling AFB, DC, January 1978, 21 p.
  Identifying Number(s): CONTRIB-2959
  Keywords: Numerical analysis; Cagniard deHoop technique; Seismic waves; Ray theory; Reprints; Wave propagation; Elastic waves; Faults (Geology); Iterations; Earthquakes

• Lienert, B. R.; Berg, E.; Frazer, L. N.
  Hypocenter: An Earthquake Location Method Using Centered, Scaled, and Adaptively Damped Least Squares.
  June 1986, 15 p.
  Identifying Number(s): HIG-CONTRIB-1712
  Keywords: Equations; HYPOCENTER model; Velocity; Arrival time; Seismic velocity; Seismic data; Damping; Time; Earthquakes; Position (Location); Travel time; Algorithms; Seismic arrays; Mean; Reprints; Variables; Epicenters; Adaptive systems; Iterations; Least squares method