GEOL 101 week 7
GEOL 101 week 7 GEOL 101-01
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This 2 page Class Notes was uploaded by Jessica_Kline on Wednesday October 7, 2015. The Class Notes belongs to GEOL 101-01 at Ball State University taught by Kirsten N. Nicholson in Fall 2015. Since its upload, it has received 21 views. For similar materials see Planet Earth's geological environment in Science at Ball State University.
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Date Created: 10/07/15
GEOL 101 Week 7 1005 amp 1007 Earthquakes I Earthquakes occur when stress along a fault is greater than the rupture strength of the rock the rock has so much pressure on it that it breaks which releases stress in the lithosphere a Different types of faults 1 Strikeslip when rocks move across but not up or down 2 Normal when rocks are pulled apart causing one to move lower than the other the hanging wall is the top side of the fault and the foot wall is the bottom of the fault 3 Reverse when two rocks are pushed together this is how mountains form with folds different levels of reverse faults with anticline the top of the hill and syncline the bottom b Important places during an earthquake 1 Focus where the rock breaks can be on the surface or under 2 Epicenter the area on the surface above where a rock breaks II Seismic waves a Body waves travel through the entire earth 1 P waves compression and decompression 2 S waves shear can only move through solids b Surface waves only travel on the earth s surface 1 Love waves move sideways Rayleigh wave 2 Rayleigh waves move up and down circular 53osrarzE quot 7 c Measuring waves 1 Frequency how many waves per second and period seconds between wave peaks 2 Richter Scale 1 to 10 scale measuring magnitude 3 Modi ed Mercalli Scale a l to 12 scale III Manmade earthquakes a Dams the weight of all the water in the ground is enormous b Garbage piles the huge ones c Any type of eXplosion nuclear or not d The earthquake cycle is manmade to try to regulate the size of an earthquake we try to make it so that there are several smaller earthquakes rather than one big one IV Effects a Primary 1 Ground shaking 2 Ruptures or ssures opening up the rock actually breaking b Secondary 1 Infrastructure can fall Japan has some of the greatest earthquakeproofed buildings in the world 2 Fire and disease are the two biggest causes of death in an earthquake 3 Other effects are liquefaction makes buildings sink tsunamis and landslides
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