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Earthquakes and Seismic Hazards

by: June Gottlieb

Earthquakes and Seismic Hazards GEOL 344

Marketplace > University of Idaho > Geology > GEOL 344 > Earthquakes and Seismic Hazards
June Gottlieb
GPA 3.52

Simon Kattenhorn

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Simon Kattenhorn
Class Notes
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This 2 page Class Notes was uploaded by June Gottlieb on Friday October 23, 2015. The Class Notes belongs to GEOL 344 at University of Idaho taught by Simon Kattenhorn in Fall. Since its upload, it has received 10 views. For similar materials see /class/227867/geol-344-university-of-idaho in Geology at University of Idaho.


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Date Created: 10/23/15
SEISMIC HAZARD ASSESSMENT HAZARD any physical phenomenon associated with an earthquake ground shaking fault movement landslides tsunamis liquefaction etc RISK the probability of human casualties or injuries and dollar damage or loss to property buildings roads and other infrastructure So seismic risk is a probabilistic expression of the product of seismic hazard and its consequences eg the output of a seismic risk analysis may show the probability in dollars from a nearby M8 EQ or the probability of fatalities due to an EQ induced nuclear power plant accident Questions to ask to reduce seismic risk of a new structure What kind of structure is being built What are the parameters of interest eg ground motions What is the intended lifespan of the structure How serious would the consequences be if the structure could not withstand an EQ What needs to be known about the geology or seismology to answer these questions PROBABILISTIC VERSUS DETERMINISTIC ASSESSMENTS Examples DETERMINISTIC Worstcase scenario is a M74 EQ occurring along a north trending vertical strikeslip fault with a closest approach to a site of interest of 15 km which in turn will give rise to a peak acceleration at this site of 04g PROBABILISTIC Two possibilities at a certain location are 1 a 50 probability of exceeding 03g during the 30year projected lifespan of a structure under consideration 2 A 5 probability of exceeding 06g during this time What is an acceptable risk


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