The U.S. Geological Service recently released an update of U.S. National Seismic Hazard Maps that reflect the latest analysis of where future earthquakes will occur, how frequently they may occur, and their strength.
While all states have some potential for earthquakes, 42 of the 50 states have a reasonable chance of experiencing damaging ground shaking from an earthquake in the next 50 years. Sixteen states have a relatively high likelihood of experiencing damaging ground shaking. These states have historically experienced earthquakes with a magnitude 6 or greater. The hazard is especially high along the west coast, intermountain west, and in several active regions elsewhere such as near New Madrid, Mo., and near Charleston, S.C.
The eastern U.S. has the potential for larger and more damaging earthquakes than considered in previous maps and assessments. This finding is due to what scientists learned following the magnitude 5.8 earthquakes that struck Virginia in 2011. It was among the largest earthquakes to occur along the east coast in the last century, and indicated that even larger events in the region are possible.
The maps are used in risk analyses calculated using factors such as population levels, building exposure, and building construction practices. These assessments are used for establishing building codes, in the analysis of seismic risk for key structures, and in determining insurance rates. They can also aid emergency preparedness plans, and private property decisions such as re-evaluating one’s real estate and making it more resilient.
(http://www.usgs.gov/blogs/features/usgs_top_story/new-insight-on-the-nations-earthquake-hazards/)
Related Stories
Resiliency | Mar 13, 2020
Feds push use of eminent domain to force people out of flood-prone homes
Local officials that don’t comply could lose federal money to combat climate change.
Codes and Standards | Mar 12, 2020
Design guide for sloped glazing and skylights updated for first time in 30 years
Helps with choosing proper glass for non-residential applications.
Codes and Standards | Mar 11, 2020
Two tree species native to the Northeast found suitable for CLT
Eastern white pine and eastern hemlock pass strength testing.
Codes and Standards | Mar 10, 2020
Prescient receives ICC certification for seismic resilience system
Technology suitable for buildings up to 12 stories in earthquake-prone areas.
Codes and Standards | Mar 6, 2020
Design firms creating plans to re-imagine D.C.’s tidal basin
Area including National Mall is facing increased flood risk.
Codes and Standards | Mar 5, 2020
France to mandate all new public buildings be 50% timber or other natural materials
Measure would go into effect by 2022.
Codes and Standards | Mar 4, 2020
American Concrete Institute and Precast/Prestressed Concrete Institute expand partnership
Will collaborate on new code requirements.
Codes and Standards | Mar 3, 2020
Wallcoverings industry releases product scorecards concerning sustainability
Tool adds more transparency to certification.
Codes and Standards | Feb 28, 2020
Bay Area communities struggle with what to do about rising sea level
Policies include sea walls, levies, and relocation.
Codes and Standards | Feb 27, 2020
Cell phones present a safety hazard at job sites
Use of ear buds, headphones banned by some contractors.