U.S. Seismic Design Maps

Due to insufficient resources and the recent development of similar web tools by third parties, the USGS has streamlined this U.S. Seismic Design Maps web application. Whereas the former application interacted with users through a graphical user interface (GUI), the replacement web services receive the inputs (e.g. latitude and longitude) in the form of a web address and return the outputs (e.g. S_DS and S_D1) in text form, without supplementary graphics. Though designed primarily to be read by the aforementioned third-party web GUIs (e.g. from ASCE, SEAOC/OSHPD, and ATC), the text outputs are also human-readable. To see the new web services, please click here. Step-by-step instructions for using one of these web services, namely that for the recently published ASCE/SEI 7-16 standard, are posted here. Most users will find the third-party web GUIs to be more usable than the underlying USGS web services.