• earthquake keychain
  • earthquake keychain
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  • earthquake keychain
  • earthquake keychain Packaging
  • earthquake keychain

Earthquake Keychain

$27.75

Product Description

mini-earthquake-02.pngThis articulating, educational keychain depicts the action and effects of an earthquake. The energy of an earthquake travels through the ground in several, ways. Each of these "seismic waves" has its own unique properties, which are sculpturally depicted. The two parts of this keychain are able to slide relative to one another, illustrating the motion of tectonic plates.

On the top surface, you can see both the ground-roll (known as "Rayleigh waves") and the horizontal movement of what are called "Love waves". On the sides of the keychain, you can see the primary waves (P waves) and the secondary waves (S waves), along with arrows indicating the motion of the ground roll. The relative speeds of propagation of the waves are shown, along with other properties, such as the change in speed of the waves when traveling through different rock layers, and the inability of "S waves" to pass through water.

On the top of the keychain are a few inhabitants, a seismic monitoring station, and a river which bends sharply along the fault line, showing evidence of past motion. If you move the parts of the keychain, you can see agricultural furrows become juxtaposed, showing evidence of more recent movement!

The effort to understand, predict, and mitigate the effects of this supremely unpredictable phenomenon has been one of the major objectives of the Earth sciences. This unique miniature celebrates the work of those engaged in this critically important pursuit. A great gift for seismologists, geophysicists, and anyone interested in the remarkable workings of our dynamic planet!

Other Information

Dimensions:
3.6 cm long x 2.4 cm wide x 1.7 cm high
Other:
Made in the USA of Genuine Pewter
Acknowledgements:
Special Thanks to John Leeman
Quantity:
Weight:
41.4 Grams