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2/11/24, 7:06 PM U.S. Seismic Design Maps <br />https://www.seismicmaps.org 1/3 <br />USGS web services were down for some period of time and as a result this tool wasn't operational, resulting in timeout error. <br />USGS web services are now operational so this tool should work as expected. <br />1133 S Austin St, Santa Ana, CA 92704, USA <br />Latitude, Longitude: 33.7322407, -117.9321315 <br />Date 2/11/2024, 5:56:40 PM <br />Design Code Reference Document ASCE7-16 <br />Risk Category II <br />Site Class D - Default (See Section 11.4.3) <br />Type Value Description <br />SS 1.329 MCER ground motion. (for 0.2 second period) <br />S1 0.475 MCER ground motion. (for 1.0s period) <br />SMS 1.594 Site-modified spectral acceleration value <br />SM1 null -See Section 11.4.8 Site-modified spectral acceleration value <br />SDS 1.063 Numeric seismic design value at 0.2 second SA <br />SD1 null -See Section 11.4.8 Numeric seismic design value at 1.0 second SA <br />Type Value Description <br />SDC null -See Section 11.4.8 Seismic design category <br />Fa 1.2 Site amplification factor at 0.2 second <br />Fv null -See Section 11.4.8 Site amplification factor at 1.0 second <br />PGA 0.569 MCEG peak ground acceleration <br />FPGA 1.2 Site amplification factor at PGA <br />PGAM 0.683 Site modified peak ground acceleration <br />TL 8 Long-period transition period in seconds <br />SsRT 1.329 Probabilistic risk-targeted ground motion. (0.2 second) <br />SsUH 1.444 Factored uniform-hazard (2% probability of exceedance in 50 years) spectral acceleration <br />SsD 1.821 Factored deterministic acceleration value. (0.2 second) <br />S1RT 0.475 Probabilistic risk-targeted ground motion. (1.0 second) <br />S1UH 0.516 Factored uniform-hazard (2% probability of exceedance in 50 years) spectral acceleration. <br />S1D 0.632 Factored deterministic acceleration value. (1.0 second) <br />PGAd 0.75 Factored deterministic acceleration value. (Peak Ground Acceleration)