JBTC2.4

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Notes 2.4
(none)

Outline
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**Devices that Monitor Faults**

 * there are four kinds of devices
 * creep meter
 * measures movement of fault (left to right)
 * uses a wire stretched from one plate to another
 * laser - ranging device
 * measures movement of fault (left to right)
 * uses laser
 * water - tube tiltmeter (tiltmeter)
 * measures tilting of the ground
 * uses water
 * satellite monitors
 * uses radar to map the fault movement

**Monitoring Risk in the United States**

 * eventhough there are so many gadgets, geologists still can't predict exactlly when a earthquake can strike
 * geologists can resolve risks by mapping where faults are active