Inside Earth Chapter 2.4 Pages 78-81 Monitoring Faults Inside Earth Chapter 2.4 Pages 78-81

Devices that Monitor Faults Instruments used to observe changes and measure stress and deformation of the crust. Creep Meters Laser-Ranging Devices Tiltmeters Satellites

Creep Meters A meter with a wire stretched across a fault to measure horizontal movement Wire is anchored to a post The wire on the other side of the fault has a weight attached to it Movement can be determined by measuring how much the weight has moved. 3

Laser-Ranging Devices Detects tiny fault movements with a laser The device measures the time it takes for the beam to travel to a reflector and back Can detect any change in distance. 4

Tiltmeters Containers of water measure the tilting of the ground Acts like a carpenters level. Geologists read the scales to see how much tilting is happening along a fault. 5

Satellites Satellites bounce radio waves off the ground and the satellite records them Can detect small changes in elevation, may result when stress deforms the ground. 6

Monitoring Risk in the US Geologists cannot predict earthquakes. Exactly what will happen remains uncertain. Stress may build up and not release an earthquake. Or stress may be released in another part of the fault. Geologists know that earthquakes are likely wherever plate movements store energy in the rock along faults. Geologists can determine the risk by where faults are active and other earthquakes have occurred. 7

Monitoring Risk in the US Page 81 in textbook. 8

What to Work On Chapter Review on pages 83-85 Define the Key Terms Answer as many questions as you can Include the page you found the answer on You may work in groups of 2 Whispering only! If you or your group member is not on task, BOTH of you will be written up Jacob, summer, ryan, mary, katelyn, jason, mario, ashley, nadine,

What to Work On Kristen, Nick, Nic, Alyssa, Sal, Rocco, Gianna, Sam, Mikaela, Kelsie, LaMarre, Christine, Ethan, Jakiah, Cheyenne, Sierra, Mike Chapter Review on pages 83-85 Define the Key Terms Answer as many questions as you can Include the page you found the answer on

What to Study Know the 4 devices used to measure faults (creep meters, laser-ranging devices, tiltmeters, satellites) Be able to explain how at least 2 of them work Be able to define Liquefaction Study what you should do if an earthquake were to happen (stay away from windows, go in doorways, avoid hanging objects, etc.)