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Seismic Pulse

Estimated Time to Complete:

4 hours 24 minutes

(average of 66 minutes per Subtopic)

Provides an overview of the source signal components, and examines the source signatures and amplitude spectra of several different seismic sources. Reviews properties of the seismic pulse, explores measurement of source array responses, compares wavefront and ray properties, and discusses how acoustic impedance and particle velocity can be used to infer subsurface rock types. Discusses the processes of seismic decay, specifically geometrical spreading, attenuation, absorption and scattering, and their effect on the source signature. Examines small source and near field effects, and how to compensate for signal loss. Provides an overview of ray tracing laws and principles, specifically Snell’s Law, Fermat’s Principle, Huygens’ Principle, Huygens’ - Fermat’s Principle, and the Principle of Reciprocity. Supplies ray theory formulas, and explains how to construct wavefront counterparts from rays.

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Total Number of Subtopics: 4
  • expand/collapse Source Signal Theory
    • Introduction to Source Theory
    • Explosive Source Types
    • Impulsive Surface Sources
    • Marine Sources
  • expand/collapse Attributes of the Seismic Pulse
    • Source Array Response
    • Measurement of the Source Array Response
    • Acoustic Impedance and Particle Velocity in Rock
  • expand/collapse The Propagating Pulse
    • Source Signature
    • Spherical Spreading
    • Attenuation and Absorption
    • Scattering
  • expand/collapse Seismic Ray Theory
    • Snell's Law and Fermat's Principle
    • Huygens' Principle
    • Ray Tracing
(Use the '+' and '-' buttons to expand or collapse each Subtopic Title individually for details.)