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.
Robert Butler explaining how to use the measured arrival times of P and S waves to determine the distance to an earthquake using standard travel-time curves.
Video lecture describing thickness, layering, and brittle nature of lithospheric plates. Continental lithosphere and oceanic lithosphere are compared.
Video lecture on using foam faults to demonstrate faults and a deck of cards to demonstrate folds and fabrics. Different types of faults are: normal (extensional) faults; thrust (compressional) faults; and strike-slip (shearing) faults.
John Lahr (USGS seismologist emeritus) demonstrates that elasticity of rocks by squeezing a slit core of rock.
A hard-boiled egg is used as a scale model for the zones of the Earth. The shell is to the egg as the lithosphere is to the Earth.
Actual video of an earthquake occurring on the San Andreas Fault near Parkfield, California. Watch the trees shake and the birds fly when the earthquake shakes the ground!