BCJS+2.4

toc

=Chapter 2.4=

Outline:

 * **Instruments and Devices used**
 * **Creep Meters**
 * One side of the fault is a bulb with the meter, the other side a post anchored to the ground.
 * The weight will move to how far up the meter.
 * This device is for horizontal movement.
 * **Laser-Ranging Devices**
 * One side of the fault has the laser and the other side with a reflector.
 * It caculates how far it moved by time difference.
 * This is for any movement.
 * **Tilt-meters**
 * This device detects vertical movement.
 * A bulb of water with an amount of water is anchored on both sides.
 * Both bulbs will tilt, and the water will flow and determine information by the meter
 * **Satellite Monitors**
 * This is used for any (most likely vertical) movement
 * **Monitoring Faults and Predicting Earthquakes**
 * Stress builds until earthquake strikes
 * But, the earthquake can fail to happen
 * So, seismologists can not accurately predict the earthquakes
 * What seismologists know is that there is risk around faults that have had earlier major earthquakes