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Chapter 11 Lecture Notes - Karina Orozco Chapter 11 Lecture...

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Karina OrozcoChapter 11 Lecture Notes – Earthquakes-Several big earthquakes this year – 10/14/14 M7.2 Nicaragua-Strongest this year - Chile M8.2 quake that killed 6, tsunami with 7’ waves, 300 prisonersescaped-Most devastation – Ludain China M6.1 617 killedEarthquakes:Vibration of the Earth caused by the rapid release of energy. Often, earthquakes are caused by slip on faults.Earthquake focus and epicenterThere are 3 types of faults:reverse (thrust)strike-slipnormalDeformation and Elastic Rebound: (Ex: Pencil)a.Original position of rocks on opposite side of a fault (pencil is at rest). b.The movement of tectonic plates cause the rocks to bend and store elastic energy (Prod starts bending the pencil)c.Once the strength of the rock is exceeded, slippage along the fault produces an earthquake (once pressure is exceeded, the pencil breaks).d.The rocks return to their original shape, but in a new location (The pencil is broken, but itremains a pencil, it just has a new form).Faults Move (Slip) Two Different Ways:1.Fault Creep:Slow, gradual displacement (motion) Small EQs2.Stick-Slip:

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Term
Fall
Professor
RAPPENGLüCK
Tags
Geology, Mercalli intensity scale, particle motion, poorly built structures

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