## Earthquake Wave Analogies: UNLIKE ripples on/in water

### How are earthquake waves UNLIKE a drop of water on a pond?

Part 2/2 Comparing seismic waves to ripples in water. This animation explores how seismic waves are UNLIKE ripples on water. Dr. Geophysics helps explain 4 significant differences.

#### Keypoints:

• Potential energy builds quickly in water drop; builds over many years in Earth
• Water drop is above the surface of Earth; earthquake is below the surface
• Water waves travel in concentric spheres; changing geology causes changes in the speed of the seismic waves
• Drop falls at 2 to 600 mph; seismic waves travel at 2,000 to 28,000 mph!

Total Time: 1min 48s
Level: Novice

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## Related Animations

Exploration of how an earthquake is LIKE ripples on/in water. Dr. Geophysics guides you through the simple physics of potential energy and energy release. Analogies are a useful instructional strategy, especially in the science classroom. In this case, the analog is a drop of water hovering above and then falling into a pool of water, while the target is an earthquake.

Animation Novice

## Related Posters

This poster combines a visualization of ground motion resulting from the February 21, 2008 M 6.0 earthquake that occurred near Wells, NV, with the image of a faucet to illustrate a classic Earth science functional analogy: "Seismic waves radiate outward from an earthquake's epicenter like ripples on water".

Poster Novice

## Related Lessons

Working in both small groups and as a whole class, students investigate the classic Earth science analogy: "Seismic waves radiate outward from an earthquake's epicenter like ripples on water". A discrepant image connects the unfamiliar concept of the spreading out of seismic waves to the more familiar scenario of ripples on water radiating outwards in all directions after a droplet falls onto a pool.

Lesson Novice

The slinky is an effective tool for the demonstration seismic wave characteristics and wave propagation. Slinkys can be used both individually and in various combinations to demonstration different concepts.

Lesson Novice