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Earthquakes 101 (EQ101)PowerPoint Presentation

Earthquakes 101 (EQ101)

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Earthquakes 101 (EQ101)

USGS Earthquake Hazards Program

Lisa Wald

USGS Pasadena

U.S. Department of the Interior

U.S. Geological Survey

Plate Tectonics

USGS Earthquake Hazards Program

Lisa Wald

USGS Pasadena

U.S. Department of the Interior

U.S. Geological Survey

Strike-slip Fault Example

1906 San Francisco Earthquake

What Controls the Level of Shaking?

- Magnitude
- More energy released

- Distance
- Shaking decays with distance

- Local soils
- amplify the shaking

Earthquake Effects - Ground Shaking

Northridge, CA 1994

Earthquake Effects -Ground Shaking

Northridge, CA 1994

Earthquake Effects - Ground Shaking

Kobe, Japan 1995

Earthquake Effects - Ground Shaking

Kobe, Japan 1995

Earthquake Effects - Surface Faulting

Landers, CA 1992

Earthquake Effects - Landslides

Source: National Geophysical Data Center

Turnnagin Heights,Alaska,1964

Earthquake Effects - Tsunamis

1957 Aleutian Tsunami

Photograph Credit: Henry Helbush. Source: National Geophysical Data Center

Faultsof SouthernCalifornia

Source: SCEC Data Center

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