We use exaggerated motion of a building (seismic station) to show how the ground moves during an earthquake, and why it is important to measure seismic waves using 3 components: vertical, N-S, and E-W. Before showing an actual distant earthquake, we break down the three axes of movement to clarify the 3 seismograms.Go to Resource
This USGS video provides a tutorial for anyone interested in interpreting the seismic records on public webicorder displays. Seismometers measure vibrations. More vibration… more wiggle. Some seismometers measure only up and down; some measure up-down, north-south, and east-west motion.Go to Resource
How can I get across the idea in a classroom activity using no props?
The human wave is used as an analogy for travel times of P and S seismic waves.
This draft video uses arms over shoulders as well as hand holding methods, so read the caveats about the best method (arms over shoulders).
A video demonstration of how a slinky can be a good model for illustrating P & S seismic waves movement.Go to Resource
For an earthquake prediction to be meaningful, it has to specify a time, location, and magnitude range that is unlikely to occur randomly. Who can predict an earthquake?Go to Resource
Seismologists would love to be able to predict a major earthquake. Watch Part 1 to learn what is required. This animation compares an earthquake to a heart attack.Go to Resource