Short video segment showing shear (secondary) wave being generated in and traveling across a slinky.
Short video segment of primary (pressure) wave being generated in and traveling across a slinky.
Video lecture on wave motions and speeds of three fundamental kinds of seismic waves: Primary (P = pressure) waves; Secondary (S = shear); and Surface waves.
Video lecture describing speeds and paths of different seismic waves within Earth.
Ross Stein (US Geological Survey) explains how faults rupture during earthquakes.
Short film segment showing a seismograph displaying ground oscillations as the seismic waves from an earthquake arrive.
Video lecture on viscoelastic properties of the asthenophere region of Earth’s mantle below the lithospheric plates. Silly Putty is used as a model to show how the asthenosphere is elastic when exposed to short-duration forces (like seismic waves) but plastic when exposed to long-duration forces (like the load of the Hawaiian Islands on the Pacific Plate).
Video lecture on divergent (spreading), transform (strike-slip), and convergent (subduction and continental collision) types of plate boundaries.
Video lecture on how to use earthquake records from three seismometers and the seismic wave travel-time curves to locate the earthquake.
Video lecture on distinction between earthquake epicenter and earthquake focus.