Min/Max Design Values for Regions

Introduction

The comma-separated values (CSV) files below provide maximum and minimum SS, S1, and PGA values for each of the 50 states (plus Washington, D.C.), 3,222 counties, and most* of the 32,236 ZIP codes in the U.S. Geographic coordinates of these maxima and minima are also provided. The values and coordinates are based on the earthquake ground motion maps in, equivalently, the 2009 NEHRP Recommended Seismic Provisions, the 2010 ASCE-7 Standard, and the 2012 International Building Code.

* Values are not provided for ZIP codes so small that they do not encompass any of the grid points underlying the data.

Region Files

50 U.S. States

Name Min SS Min S1 Max SS Max S1
Arkansas 0.135g(33.020°N, 94.040°W) 0.074g(33.020°N, 94.040°W) 2.814g(36.000°N, 89.800°W) 1.117g(36.000°N, 89.800°W)
Connecticut 0.155g(41.310°N, 71.910°W) 0.057g(41.310°N, 71.910°W) 0.264g(41.000°N, 73.660°W) 0.071g(41.100°N, 73.720°W)
Iowa 0.051g(43.490°N, 93.200°W) 0.034g(43.500°N, 95.000°W) 0.123g(40.390°N, 91.380°W) 0.075g(40.390°N, 91.380°W)
Kentucky 0.144g(39.140°N, 84.730°W) 0.072g(38.750°N, 82.880°W) 2.904g(36.570°N, 89.560°W) 1.153g(36.570°N, 89.560°W)
Michigan 0.041g(48.300°N, 88.360°W) 0.016g(48.240°N, 88.690°W) 0.119g(41.740°N, 83.410°W) 0.060g(41.770°N, 87.200°W)
New Jersey 0.099g(38.800°N, 75.010°W) 0.045g(38.800°N, 75.010°W) 0.283g(40.900°N, 74.000°W) 0.073g(40.900°N, 74.000°W)
District of Columbia 0.118g(38.870°N, 76.940°W) 0.051g(38.890°N, 76.920°W) 0.119g(38.990°N, 77.040°W) 0.051g(38.930°N, 77.110°W)
Alaska 0.006g(71.400°N, 156.600°W) 0.003g(71.200°N, 156.200°W) 2.865g(59.000°N, 137.900°W) 2.482g(59.000°N, 137.900°W)
Alabama 0.083g(30.200°N, 87.650°W) 0.051g(30.180°N, 87.800°W) 0.401g(35.000°N, 88.200°W) 0.175g(35.000°N, 88.200°W)
California 0.204g(34.350°N, 114.180°W) 0.107g(34.350°N, 114.180°W) 3.730g(34.460°N, 119.010°W) 1.389g(34.400°N, 118.760°W)
Colorado 0.070g(40.700°N, 102.060°W) 0.036g(40.700°N, 102.060°W) 0.477g(37.150°N, 105.500°W) 0.143g(37.700°N, 105.550°W)
Florida 0.016g(24.600°N, 82.980°W) 0.012g(24.600°N, 82.980°W) 0.135g(30.710°N, 81.350°W) 0.068g(30.710°N, 81.350°W)
Georgia 0.087g(30.720°N, 84.860°W) 0.054g(30.710°N, 84.820°W) 0.411g(34.980°N, 84.900°W) 0.132g(32.460°N, 81.200°W)
Hawaii 0.111g(21.660°N, 160.600°W) 0.031g(21.660°N, 160.600°W) 2.670g(19.500°N, 155.480°W) 1.230g(19.500°N, 155.480°W)
Illinois 0.078g(42.500°N, 90.640°W) 0.048g(42.500°N, 90.640°W) 2.596g(37.000°N, 89.190°W) 1.002g(37.000°N, 89.190°W)
Indiana 0.094g(41.760°N, 86.000°W) 0.053g(41.760°N, 84.810°W) 0.726g(37.820°N, 88.090°W) 0.244g(37.820°N, 88.090°W)
Kansas 0.069g(40.000°N, 101.500°W) 0.034g(40.000°N, 100.900°W) 0.159g(39.200°N, 96.400°W) 0.079g(37.000°N, 94.620°W)
Maryland 0.078g(38.040°N, 75.160°W) 0.041g(38.070°N, 75.140°W) 0.190g(39.720°N, 75.790°W) 0.059g(39.720°N, 75.790°W)
Massachusetts 0.103g(41.200°N, 69.960°W) 0.045g(41.200°N, 69.960°W) 0.268g(42.880°N, 70.900°W) 0.079g(42.880°N, 70.940°W)
Minnesota 0.029g(49.380°N, 95.150°W) 0.012g(49.360°N, 94.940°W) 0.090g(45.600°N, 96.200°W) 0.038g(43.510°N, 91.220°W)
Mississippi 0.088g(30.160°N, 88.390°W) 0.052g(30.150°N, 88.420°W) 0.963g(34.990°N, 90.300°W) 0.339g(34.990°N, 90.300°W)
Missouri 0.079g(40.570°N, 94.000°W) 0.049g(40.580°N, 95.770°W) 3.017g(36.700°N, 89.600°W) 1.222g(36.700°N, 89.600°W)
Montana 0.056g(48.990°N, 108.100°W) 0.023g(48.990°N, 108.290°W) 1.712g(44.650°N, 111.550°W) 0.561g(44.600°N, 111.700°W)
Nebraska 0.068g(40.600°N, 101.400°W) 0.033g(41.200°N, 100.100°W) 0.162g(43.000°N, 104.050°W) 0.054g(40.000°N, 95.310°W)
Nevada 0.250g(35.010°N, 114.640°W) 0.096g(39.650°N, 114.100°W) 2.602g(39.200°N, 119.750°W) 0.938g(39.200°N, 119.750°W)
New Hampshire 0.181g(42.770°N, 72.510°W) 0.070g(42.730°N, 72.450°W) 0.306g(43.600°N, 71.400°W) 0.090g(43.900°N, 71.500°W)
New York 0.120g(42.010°N, 76.900°W) 0.050g(42.000°N, 79.200°W) 0.560g(44.990°N, 74.300°W) 0.141g(44.990°N, 74.300°W)
North Carolina 0.070g(35.650°N, 75.410°W) 0.042g(35.650°N, 75.410°W) 0.415g(35.520°N, 83.870°W) 0.144g(34.290°N, 79.060°W)
North Dakota 0.033g(49.000°N, 97.230°W) 0.014g(49.000°N, 97.230°W) 0.166g(48.900°N, 104.040°W) 0.035g(48.800°N, 104.040°W)
Ohio 0.100g(40.000°N, 81.200°W) 0.050g(41.950°N, 83.110°W) 0.227g(41.700°N, 81.000°W) 0.081g(39.110°N, 84.820°W)
Oklahoma 0.089g(36.990°N, 101.100°W) 0.039g(36.990°N, 101.700°W) 0.498g(34.700°N, 98.300°W) 0.141g(34.700°N, 98.300°W)
Oregon 0.260g(43.100°N, 117.030°W) 0.096g(43.100°N, 117.030°W) 2.379g(42.830°N, 124.660°W) 1.068g(42.850°N, 124.650°W)
Pennsylvania 0.104g(39.910°N, 80.510°W) 0.049g(41.100°N, 78.600°W) 0.223g(40.300°N, 74.880°W) 0.064g(40.400°N, 74.980°W)
Rhode Island 0.136g(41.100°N, 71.560°W) 0.052g(41.110°N, 71.520°W) 0.180g(42.010°N, 71.390°W) 0.063g(42.010°N, 71.390°W)
South Carolina 0.247g(35.160°N, 81.250°W) 0.103g(34.510°N, 83.070°W) 1.898g(33.300°N, 80.000°W) 0.674g(33.300°N, 80.000°W)
South Dakota 0.058g(45.940°N, 102.000°W) 0.024g(45.930°N, 98.750°W) 0.162g(43.010°N, 104.050°W) 0.052g(43.010°N, 104.050°W)
Tennessee 0.203g(36.620°N, 85.200°W) 0.095g(36.610°N, 81.650°W) 3.060g(36.200°N, 89.500°W) 1.259g(36.200°N, 89.500°W)
Texas 0.032g(25.840°N, 97.380°W) 0.013g(25.840°N, 97.380°W) 0.624g(31.350°N, 105.900°W) 0.186g(31.350°N, 105.900°W)
Utah 0.129g(37.000°N, 109.100°W) 0.047g(37.000°N, 109.200°W) 1.720g(41.000°N, 112.350°W) 0.661g(40.850°N, 111.900°W)
Vermont 0.175g(42.740°N, 72.900°W) 0.069g(42.740°N, 72.800°W) 0.451g(44.990°N, 73.350°W) 0.123g(44.990°N, 73.350°W)
Virginia 0.078g(37.870°N, 75.280°W) 0.041g(38.010°N, 75.180°W) 0.327g(36.600°N, 83.500°W) 0.110g(36.600°N, 83.640°W)
Washington 0.288g(46.700°N, 117.040°W) 0.103g(48.990°N, 117.040°W) 1.669g(48.050°N, 123.400°W) 0.748g(47.330°N, 124.390°W)
West Virginia 0.102g(39.910°N, 80.800°W) 0.052g(39.590°N, 77.830°W) 0.266g(37.240°N, 81.220°W) 0.091g(37.210°N, 81.680°W)
Wisconsin 0.041g(46.200°N, 91.400°W) 0.016g(47.140°N, 91.020°W) 0.111g(42.500°N, 88.590°W) 0.054g(42.500°N, 88.600°W)
Wyoming 0.094g(44.990°N, 104.060°W) 0.038g(44.990°N, 104.060°W) 2.421g(44.250°N, 110.450°W) 0.809g(41.950°N, 110.850°W)
Arizona 0.127g(36.790°N, 109.050°W) 0.045g(36.500°N, 109.200°W) 0.978g(32.500°N, 114.810°W) 0.333g(32.500°N, 114.810°W)
Delaware 0.086g(38.460°N, 74.990°W) 0.042g(38.460°N, 74.990°W) 0.201g(39.830°N, 75.600°W) 0.060g(39.830°N, 75.600°W)
Idaho 0.187g(42.800°N, 114.200°W) 0.078g(42.700°N, 114.400°W) 1.708g(42.700°N, 111.050°W) 0.538g(44.600°N, 111.520°W)
Louisiana 0.074g(29.600°N, 93.810°W) 0.041g(29.600°N, 93.810°W) 0.209g(33.000°N, 91.170°W) 0.106g(33.000°N, 91.170°W)
Maine 0.149g(43.740°N, 68.820°W) 0.061g(43.740°N, 68.820°W) 0.481g(47.210°N, 69.480°W) 0.147g(47.210°N, 69.480°W)
New Mexico 0.079g(33.900°N, 103.700°W) 0.032g(33.700°N, 103.400°W) 0.625g(36.000°N, 106.150°W) 0.183g(36.000°N, 106.200°W)
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