American Geosciences Institute.
Seismic Design Category Maps for Residential Construction were developed and published in 2007 as two PDFs. The U.S. Geological Survey (USGS) National Seismic Hazard Map shows the strength of ground shaking that has a 1 in 50 chance of being exceeded in a particular place in the lower 48 states over a period of 50 years. A magnitude 9.0 earthquake off the Pacific Northwest coast could hit at any time.
All rights reserved. *Abbreviated descriptions from The Modified Mercalli Intensity Scale.SDCs take into account the type of soil at the site, as poor soils can significantly increase earthquake shaking. This program can be used to obtain the earthquake ground motion parameters needed to design structures for specific geographic locations in accordance with the latest building code reference documents.
Before sharing sensitive information, make sure you’re on a federal government site. Hazards are measured as the likelihood of experiencing earthquake shaking of various intensities.How to read the mapsThe colors in the maps denote “seismic design categories” (SDCs), which reflect the likelihood of experiencing earthquake shaking of various intensities.
Hazards are measured as the likelihood of experiencing earthquake shaking of various intensities.The colors in the maps denote “seismic design categories” (SDCs), which reflect the likelihood of experiencing earthquake shaking of various intensities.
This is explained in more detail in Your Earthquake Risk.View earthquake hazards from across the United States.The U.S. Geological Survey, in cooperation with FEMA and the Building Seismic Safety Council, has developed a web-based seismic design application for building designers. Ground shaking is the most powerful predictor of damage from an earthquake.
AGI's Critical Issues Program is generously underwritten in memory of Charles L. Weiner
Federal government websites often end in .gov or .mil. The maps displayed below show how earthquake hazards vary across the United States.
Earthquake hazard map showing peak ground accelerations having a 2 percent probability of being exceeded in 50 years, for a firm rock site. (Building design and construction professionals use SDCs specified in The following table describes the hazard level associated with each SDC and the associated levels of shaking. Click The American Geosciences Institute represents and serves the geoscience community by providing collaborative leadership and information to connect Earth, science, and people.Copyright © 2020. The The amount of shaking an earthquake produces at a particular place depends not only on the earthquake's size, but also local characteristics like the bedrock type and soil type. These maps are used in determining building seismic codes, insurance rates, and other
Ground shaking is the most powerful predictor of damage from an earthquake. 2018 Long-term National Seismic Hazard Map.
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earthquake risk map by zip code