New maps show active earthquake faults and geologic complexity of Bay Area

New maps show active earthquake faults and geologic complexity of Bay Area

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USA, 17 April 2006: The U.S. Geological Survey (USGS) will release new maps of active faults in the Bay Area and the complex geology that underlays the region during the 1906 Earthquake Centennial Conference in San Francisco. The map/posters will contribute to the understanding of earthquake hazard in the Bay Area as well as the region´s complex geology and geologic history.

One map shows faults that have produced earthquakes in the past two million years, highlighting those that have produced large earthquakes in the past few hundred years and are thought to be the most likely source of future earthquakes. The second shows the distribution of different geologic materials that make up the landscape and influence the distribution of natural hazards such as landslides and natural resources such as groundwater.