JLKP+2.4

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 * Section 2.4**


 * Vocabulary**

(none)


 * Outline**

Southern Texas and Southern Florida have NO earthquakes---
 * **Devices that Monitor Faults**
 * 4 devices to monitor faults
 * Tiltmeters,laser-ranging devices,Creep meters, Satellite monitors
 * earthquakes almost always strike without warning
 * only clue may be the slight rise and fall of the land
 * *Creep Meters*
 * measures horizontal movement in the floor
 * measure the amount of movement the fault has made
 * *Laser-ranging Device*
 * uses a laser beam to find any movement (even if it is very tiny)
 * *Tiltmeters*
 * like a carpenter's level
 * measure amount of tilt along the fault
 * *Satellite Monitors*
 * make image of faults
 * the waves echo back into space,and the satellite records them
 * **Monitoring Risk in the United States**
 * geologists can NEVER predict EXACTLY when and where the quake will strike
 * earthquake risk is highest along the Pacific Coast of US ( California, Washington, Alaska)
 * severe earthquakes are seldom east of the Rockies
 * __*Creep Meter*__**
 * __*Laser-Ranging Device*__**
 * __*Tiltmeter*__**