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Published byBlake McKinnon Modified over 2 years ago

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Primary effects Ground shaking, tilting, and ground rupture Loss of life and collapse of infrastructure Landslides, liquefaction, and tsunamis Secondary effects Fires, floods, and diseases Effects of Earthquakes (1)

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Depending upon the frequency of seismic waves Body waves (P and S) having higher frequency than surface waves High frequency waves posing more threats on low structures Low frequency waves posing more impact on tall structures High frequency waves attenuated faster over distance, higher buildings far away from the epicenter can be damaged Effects of Earthquakes (2)

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Stanford University, Geology Quad, 1906 Earthquake

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Fault rupture ChiChi, Taiwan, 1999 Fotos from geot.civil.metro-u.ac.jp/ archives/eq/99taiwan/

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Ground Amplification

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Liquefaction Nijgata earthquake, 1964 Ml7.5 Ismitz, turkey, 1999 Fotos from USGS web site

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Liquefaction Chichi, 1999 Fotos from geot.civil.metro-u.ac.jp/ archives/eq/99taiwan/

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Landslides Chichi earthquake 1999

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Kingston and Port Royal Jamaica 1692

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Faults in San Francisco Bay Area

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Damage to San Francisco from 1989 Loma Prieta Earthquake

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Damage to Bay Bridge from 1989 Loma Prieta Earthquake

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Faults in Los Angeles

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Damage from 1994 Northridge, CA earthquake

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Failure of Van Norman Dam from 1971 San Fernando Earthquake

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Failure of freeway overpasses during 1971 San Fernando Earthquake

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