The National Seismic Hazard Maps (NSHM) (and the hazard model from which they are derived) are first and foremost a suite of products aimed at improving earthquake-resilient construction in the United States. As described below, the changes to the NEHRP maps took advantage of another post-Northridge change: the modern generation of U.S. Geological Survey (USGS) National Seismic Hazard Maps. Home (current) About; Report an Issue; Contact; Search for Address or Coordinates Reference. Big urban earthquakes are often regional disasters that affect millions of people and livelihoods. The U.S. Geological Survey?s maps of earthquake shaking hazards provide information essential to creating and updating the seismic design provisions of building codes and insurance rates used in the United States. U.S. Seismic Design Maps Web Services Due to insufficient resources and the recent development of similar web tools by third parties, the USGS has replaced its former U.S. Seismic Design Maps web applications with web services that can be used through third … Having issued National Seismic Hazard Maps in 1996, the USGS updated them in 2002, 2008, and again in 2014; a summary of the updates to the USGS hazard maps can be found in my earlier AIR blog. Custom Probability . The models are based on seismicity and fault-slip rates, and take into account the frequency of earthquakes of various magnitudes. Foreign Hazard MapsIncludes Afghanistan, Sumatra, State of Gujarat,India. The first is a new map of the young geologic deposits in the low-lying sections of the Bay Area. This geonarrative (Esri Story Map) takes you on a virtual tour of 1906 and 1969 earthquake damage in Santa Rosa, shows examples of buildings that have been retrofitted to protect against future earthquake shaking, and highlights locations where faulting from large earthquakes and slow fault slip (creep) is expressed at the ground surface. The Global Earthquake Model (GEM) Global Seismic Hazard Map (version 2018.1) depicts the geographic distribution of the Peak Ground Acceleration (PGA) with a 10% probability of being exceeded in 50 years, computed for reference rock conditions (shear wave velocity, VS30, of 760-800 m/s). The timing of USGS hazard model updates is coordinated with building-code updates developed by committees of civil engineers. DISCLAIMER. Seismic-Hazard Maps for the Conterminous United States, 2014 A geonarrative (Esri Story Map) that describes what can be expected in a large earthquake in a populated area. However, the scenarios in this catalog include site response in the maps, based on maps of the time-averaged shear-wave velocity in the upper 30 m (Vs30). Scientific Investigations Map 3195 >> Pubs Warehouse > SIM 3195. Seismic Hazard Curves and Uniform Hazard Response Spectra for the United State s A User Guide to Accompany Open- File Report 01- 436 A. D. Frankel 1 and E. V. Leyendecker 2 ABSTRACT The U.S. Geological Survey (USGS) recently completed new probabilistic seismic hazard maps for the United States. The national seismic hazard maps for the conterminous United States have been updated to account for new methods, models, and data that have been obtained since the 2008 maps were released (Petersen and others, 2008). The 2008 U.S. Geological Survey (USGS) National Seismic Hazard Maps display earthquake ground motions for various probability levels across the United States and are applied in seismic provisions of building codes, insurance rate structures, risk assessments, and other public policy. Earthquake hazard map showing peak ground accelerations having a 2 percent probability of being exceeded in 50 years, for a firm rock site. The updated model represents an assessment of the best available science in … The development of the 2002 maps followed the same open process. Long-term Alaska Hawaii Puerto Rico & U.S. Virgin Islands Guam & Marianas Samoa & Pacific Islands; 2018 VIEW: VIEW 2017 VIEW 2016 VIEW 2014 VIEW 2012 VIEW: VIEW: 2007 VIEW 2008 VIEW 2003 VIEW 2002 VIEW 1999 VIEW 1998 VIEW 1996 VIEW Hazard Tools. What are the USGS National Seismic Hazard Maps? Uniform California Earthquake Forecasts (UCERFs)Time-dependent earthquake probability maps for California from the Working Group on California Earthquake Probabilities. In addition, we instituted an open, consensus-building process where there was feedback from geoscientists and engineers on the methodology and inputs for the maps during several regional workshops. The 2018 Update of the U.S. National Seismic Hazard Model defines the potential for earthquake ground shaking for various probability levels across the conterminous United States and is applied in seismic provisions of building codes, insurance rate structures, risk assessments, and other public policy. The NEHRP maps were – and continue to be – adopted into the International Building Code (IBC), which supplanted the UBC and other model building codes. Interactive fault map and comprehensive geologically based information on known or suspected active faults and folds in the United States. Most residents of the Bay Area live and work in these low-lying areas that are underlain by these young deposits. Latest earthquakes map and list (past 24 hours, M2.5+) from the ANSS (Advanced National Seismic System). Andrea Nakano reports. USGS national seismic hazard maps (see Frankel et al., 1996; Frankel et al., 2000). While the information presented on this website is believed to be correct, SEAOC /OSHPD and its sponsors and contributors assume no responsibility or liability for its accuracy. Featured at the top are our most popular maps, but there are many, many more in various publications. The design values provided by the U.S. Seismic Design Maps tool are different than the USGS hazard values because the design values are the lesser of probabilistic and deterministic ground motion values. Interactive fault map and comprehensive geologically based information on known or suspected active faults and folds in the United States. Geographic Names Information System (GNIS), Mapping, Remote Sensing, and Geospatial Data, Earthquake Tour of Santa Rosa, California, The 2019 Ridgecrest, California, Earthquake Sequence, The HayWired Scenario: An Urban Earthquake in a Connected World. View Earthquake Map. USGS Earthquake Hazards Program, responsible for monitoring, reporting, and researching earthquakes and earthquake hazards Jump to Navigation Please do not use this tool to obtain ground motion parameter values for the design code reference documents covered by the U.S. Seismic Design Maps web tools (e.g., the International Building Code and the ASCE 7 or 41 Standard). (Source: USGS) The maps represent an assessment of the … The USGS National Seismic Hazard Model is incorporated into U.S. building codes, as well as in risk assessments. Those committees also provide user feedback that can improve the USGS model. The hazard maps Leyendecker, Nancy Dickman, Stanley Hanson, and Margaret Hopper New seismic hazard maps have been prepared by the USGS for the conterminous United States. The U.S. National Seismic Hazard Maps are revised every six years, corresponding with the update cycle of the International Building Code. A geonarrative (Esri Story Map) describing what it might be like the next time the Hayward fault has a large earthquake. Web APIs. Earthquake scenarios describe the expected ground motions and effects of specific hypothetical large earthquakes. -list of contacts for various products, and links to publications, Geographic Names Information System (GNIS), Mapping, Remote Sensing, and Geospatial Data, Seismic Hazard Maps and Site-Specific Data, Uniform California Earthquake Forecasts (UCERFs), National Seismic Hazard Model Project Team, National Seismic Hazard Model Project Steering Committee. These maps are intended to summarize the available quantitative information about seismic ground motion hazard for the conterminous United States from geologic and geophysical sources. Global, national and regional networks recording earthquakes and crustal movements, maps, station information, real-time seismic waveforms. USGS Home Contact USGS Search USGS. Tap/click on "gear icon" for options and settings. Also, generalized fault data used in the hazard maps. The NSHMs address this question by compiling all known earthquake … The models are based on seismicity and fault-slip rates, and take into account the frequency of … Site conditions are accounted for in the building code separately. GeoServe - places, regions and layers used in Latest Earthquakes. National Seismic Hazard Maps: Documentation June 1996 By Arthur Frankel, Charles Mueller, Theodore Barnhard, David Perkins, E.V. The grid of points was contoured to produce the final representation of the seismic hazard. The maps also contribute to the California Geological Survey’s Seismic Hazard Zone maps. This USGS geonarrative (Esri Story Map) summarizes the USGS response and findings after the M6.4 on July 4 and M7.1 on July 6, 2019 in Searles Valley, Southern California, and includes links to USGS research publications and data releases. Tap/click on "gear icon" for options and settings. The U.S. Geological survey released a new hazard map which puts areas of the East Bay and San Jose at a higher risk for damage. U.S. Seismic Design Maps Web Services Due to insufficient resources and the recent development of similar web tools by third parties, the USGS has replaced its former U.S. Seismic Design Maps web applications with web services that can be used through third … Earthquake Hazards - National Hazard Maps, faults, and more. U.S. Short-term U.S. If the application does not load, try our legacy Latest Earthquakes application. Short-period ground motions effect short-period structures (e.g., one-to-two story buildings). The updated 2018 National Seismic Hazard Model includes new ground motion models, aleatory uncertainty, and soil amplification factors for the central and eastern U.S. and incorporates basin depths from local seismic velocity models in four western U.S. (WUS) urban areas. Engineers who construct buildings need to know how strongly a particular site might be shaken by earthquakes. Earthquake hazard map showing peak ground accelerations having a 2 percent probability of being exceeded in 50 years, for a firm rock site. Latest earthquakes map and list (past 24 hours, M2.5+) from the ANSS (Advanced National Seismic System). Urban Seismic HazardsIncludes California, Central and Eastern U.S., Pacific Northwest hazard maps and data. Then, the USGS calculates values of seismic design parameters based on USGS hazard values and in accordance with design code procedures. Earthquakes - real-time and catalog (ComCat). The Global Seismic Hazard database can be downloaded through the Download Data subsection which also provides details about the data, utilities for data plotting and other useful information. Risk Category . The material presented … Many of the changes in the 2002 maps … The Seismic Hazards Program delineates areas prone to ground failure and other earthquake-related hazards including soil liquefaction (the failure of water-saturated soil), earthquake-induced landslides, surface fault rupture, and tsunami inundation. The 2014 USGS seismic hazard maps do not account for site response directly. Vs30 DataGlobal data and U.S. data compilations. The list below are interactive graphic-rich USGS geonarratives (Esri Story Maps). Locally, the … The Global Seismic Hazard Map is the result of Global Seismic Hazard Assessment Program (GSHAP). Seismic Design Maps. Data, maps, source code, and additional resources can be found below. 2018 Long-term National Seismic Hazard Map. The more we know what to expect, the better we can prepare to reduce the impacts of the next one. This update of the maps incorporates new findings on earthquake ground shaking, faults, seismicity, and geodesy. USGS Earthquake Hazards Program, responsible for monitoring, reporting, and researching earthquakes and earthquake hazards. Jump to Navigation 2008 National Seismic Hazard Maps - Source Parameters. Research The USGS Earthquake Hazards Program is part of the National Earthquake Hazards Reduction Program (NEHRP) , established by Congress in 1977, and the USGS Advanced National Seismic System (ANSS) was established by Congress as a NEHRP facility. USGS maps is described in Frankel (1995) and the reader is referred there for more details. See also Global Earthquake Model (GEM). The Latest Earthquakes application supports most recent browsers, view supported browsers. A general overview of the 2014 USGS National Seismic Hazard Map, indicating the probability of earthquakes throughout the United States. Unified Hazard Tool - Replaces most of the previous individual tools. The map is based on the most recent USGS models for the conterminous U.S. (2018), Hawaii (1998), and Alaska (2007). Seismic Hazard Maps and Site-Specific Data. OpenSHAProvides a platform that can accomodate both past and future models. An interactive geonarrative (Esri Story Map) showing 62 field trip stops for exploring the Hayward Fault in the East San Francisco Bay Region of California. Also, generalized fault data used in the hazard maps. The map is based on the most recent USGS models for the conterminous U.S. (2018), Hawaii (1998), and Alaska (2007). Scientists examined a hypothetical earthquake, the magnitude 7.0 HayWired earthquake scenario. These maps cover the conterminous U.S. and will be updated in 2014 using the best-available science that is obtained from colleagues at regional and topical workshops, which are convened in 2012-2013. Skip Links. Seismic-Hazard Maps for the Conterminous United States. Another important aspect of this study is the use of alternative models of seismic hazard in a logic tree formalism. US Hazard; US Seismic … This seismic hazard map of North and Central America and the Caribbean depicts the likely level of short-period ground motion from earthquakes in a fifty-year window. Through such user engagement, the USGS has provided science-based … Then, the USGS calculates values of seismic design parameters based on USGS hazard values and in accordance with design code procedures. Site Class Address Coords Go. How do I get the Global Seismic Hazard data? Faults. Data, maps, source code, and additional resources can be found below. For the central and Eastern United States (CEUS), different models based on different reference magnitudes are combined to Periodic revisions of these maps incorporate the results of new research.