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Design Ground Motions Portal

By Earthquake Hazards Program

This web portal provides links to web tools, maps, and underlying data for the earthquake ground motions of several seismic design documents. Click on each document title below to see the links. For questions/comments, email nluco@usgs.gov.

Based on 2021 & prior USGS NSHMs:

The earthquake ground motions of this group of seismic design documents are based on the 2021 USGS National Seismic Hazard Model (NSHM) for Hawaii, the 2018 NSHM for the conterminous United States (48 states), the 2012 NSHMs for Guam & the Northern Mariana Islands and American Samoa, the 2007 NSHM for Alaska, and the 2003 NSHM for Puerto Rico & the U.S. Virgin Islands.

2023 AASHTO Specifications (AASHTO-2023)

Web Interface:  None until developed by AASHTO or others.

Web Service (source of data for web interface):  https://earthquake.usgs.gov/ws/designmaps/aashto-2023/

Maps:  None.

Underlying Gridded Data:  https://doi.org/10.5066/P9EACMIX ("AASHTO-USGS Seismic Design Ground Motion Database")                                              

Risk-Targeted Design Ground Motion Calculator (for site-specific analysis):  https://earthquake.usgs.gov/ws/nshmp/designmaps/rtgm/.

 

Based on 2018 & prior USGS NSHMs:

The earthquake ground motions of this group of seismic design documents are based on the 2018 USGS National Seismic Hazard Model (NSHM) for the conterminous United States (48 states), the 2012 NSHMs for Guam & the Northern Mariana Islands and American Samoa, the 2007 NSHM for Alaska, the 2003 NSHM for Puerto Rico & the U.S. Virgin Islands, and the 1998 NSHM for Hawaii.

2024 International Residential Code (IRC-2024)

 

Maps:  Available from IRC-2024 Section 301.2.2.1 or FEMA P-2192-4.

Web Interface:  None specifically for the IRC-2024 maps, but https://ascehazardtool.org/ can be used with the following steps:

  1. Enter the location (address, lat/long, or find on map).

  2. Select (i) ASCE/SEI 7-22 as the "Standard Version," (ii) any "Risk Category" (I-IV), (iii) Default as the "Site Soil Class" (for the mapped seismic design categories), and (iv) Seismic as the "Load Type."

  3. Click on "View Results" and then "Summary" or "Details."

  4. Find the SDS value, and use it to set the Seismic Design Category (SDC) in accordance with IRC-2024 Table R301.2.2.1.1. Note that this IRC SDC is defined differently than the SDC in ASCE/SEI 7 and the IBC.

 

2024 International Building Code (IBC-2024)

Maps:  Available from IBC-2024 Section 1613.2 or FEMA P-2192-4.

Web Interface:  None specifically for the IBC-2024 maps, but https://ascehazardtool.org/ can be used with the following steps:

  1. Enter the location (address, lat/long, or find on map).

  2. Select (i) ASCE/SEI 7-22 as the "Standard Version," (ii) the "Risk Category" of interest (I-IV), (iii) the "Site Soil Class" of interest (e.g., Default for the mapped seismic design categories), and (iv) Seismic as the "Load Type."

  3. Click on "View Results" and then "Summary" or "Details."

  4. Find the Seismic Design Category, which is defined in the same way in ASCE/SEI 7 and the IBC.

 

2023 ASCE/SEI 41 Standard (ASCE41-23)

Web Interface:  https://ascehazardtool.org/

Web Service (source of data for web interface):  https://earthquake.usgs.gov/ws/nshmp/designmaps/asce41-23/

Underlying Gridded Data:  pending

 

2022 ASCE/SEI 7 Standard (ASCE7-22)

Web Interface:  https://asce7hazardtool.online/.

Web Service (source of data for web interface):  https://earthquake.usgs.gov/ws/designmaps/asce7-22.html

Maps:  Available from ASCE here or see the 2020 NEHRP Provisions below.

Underlying Gridded Data:  https://doi.org/10.5066/P9I0R4O6 ("USGS Seismic Design Geodatabase"; same as 2020 NEHRP Provisions below)

 

2020 NEHRP Provisions (NEHRP-2020)

 

Based on 2014 & prior USGS NSHMs:

The earthquake ground motions of this group of seismic design documents are based on the 2014 USGS National Seismic Hazard Model (NSHM) for the conterminous United States (48 states), the 2012 NSHMs for Guam & the Northern Mariana Islands and American Samoa, the 2007 NSHM for Alaska, the 2003 NSHM for Puerto Rico & the U.S. Virgin Islands, and the 1998 NSHM for Hawaii.

2018 & 2021 International Building Code (IBC-2018+2021)

 

Web Interface:  See 2016 ASCE/SEI 7 Standard below.

Web Service (source of data for Web Interface):  See 2016 ASCE/SEI 7 Standard below.

Maps:  https://codes.iccsafe.org/content/IBC2018P3/chapter-16-structural-design

Data:  https://doi.org/10.5066/P9NT3NRE 

 

To be added:  2017 ASCE/SEI 41 Standard (ASCE41-17)

 

2016 ASCE/SEI 7 Standard (ASCE7-16)

 
                        

2015 NEHRP Provisions (NEHRP-2015)                                                                                                           

 

Based on 2012 & prior USGS NSHMs:

The earthquake ground motions of this group of seismic design documents are based on the 2012 USGS National Seismic Hazard Model (NSHM) for Guam & the Northern Mariana Islands and American Samoa, the 2008 NSHM for the conterminous United States (48 states), the 2007 NSHM for Alaska, and the 2003 NSHM for Puerto Rico & the U.S. Virgin Islands.

To be added:  2015 International Building Code (IBC-2015)                                                                                                                  

 

Based on 2008 & prior USGS NSHMs:

The earthquake ground motions of this group of seismic design documents are based on the 2008 USGS National Seismic Hazard Model (NSHM) for the conterminous United States (48 states), the 2007 NSHM for Alaska, the 2003 NSHM for Puerto Rico & the U.S. Virgin Islands, and the 1998 NSHM for Hawaii.

To be added:  2013 ASCE/SEI 41 Standard (ASCE41-13)

 
 

To be added:  2012 International Building Code (IBC-2012)

 
 

2010 ASCE/SEI 7 Standard (ASCE7-10)

 

 

Based on 2003 & prior USGS NSHMs:

The earthquake ground motions of this group of seismic design documents are based on the 2003 USGS National Seismic Hazard Model (NSHM) for Puerto Rico & the U.S. Virgin Islands, the 2002 NSHM for the conterminous United States (48 states), the 1999 NSHM for Alaska, and the 1998 NSHM for Hawaii.

2009 AASHTO Specifications (AASHTO-2009)

 

Web Interfaces:  None known.

Web Service (source of data for web interfaces):  https://earthquake.usgs.gov/ws/designmaps/aashto-2009.html (with step-by-step instructions at https://www.usgs.gov/media/files/step-step-instructions-aashto-guide-specifications)

Maps (in documents):  See, e.g., the AASHTO LRFD Bridge Design Specifications, 9th Edition and AASHTO Guide Specifications for LRFD Seismic Bridge Design, 2nd Edition, with 2012, 2014, and 2015 Interim Revisions.

Data:  https://www.sciencebase.gov/catalog/item/5b2bb1bbe4b040769c10743f. For access, please email zkortum@usgs.gov and nluco@usgs.gov.

 

To be added:  2006 & 2009 International Building Code (IBC-2006+2009)

 
 

To be added:  2005 ASCE/SEI 7 Standard (ASCE7-05)

 
 

To be added:  2003 NEHRP Provisions (NEHRP-2003)

 

Based on 1996 USGS NSHM:

The earthquake ground motions of this group of seismic design documents are based on the 1996 USGS National Seismic Hazard Model (NSHM) for the conterminous United States (48 states).

To be added:  2000 & 2003 International Building Code (IBC-2000+2003)                                                                           

                                    

To be added:  1998 & 2002 ASCE/SEI 7 Standard (ASCE7-98+02)

 
 

To be added:  1997 & 2000 NEHRP Provisions (NEHRP-1997+2000)

 

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