716 



TABLE 805.— ACCELERATION OF GRAVITY (g) IN THE UNITED STATES 



The following table is abridged from the table of Principal Facts in U. S. Coast and Geodetic 

 Survey Special Publication No. 244, Pendulum Gravity Data in the United States. The observed 



values depend on relative determinations and on an adopted value of 980.118 for the Commerce 

 Building Base in Washington, D. C. 



There are also given two types of gravity anomalies. The free-air anomaly is the difference 



between the observed value of gravity and the theoretical values of gravity for the latitude of the 



station corrected for the elevation of the station. The isostatic anomaly is the difference between 



the observed values of gravity and the theoretical value of gravity for the latitude of the station 

 corrected for the elevation of the station, topography and isostatic compensation in the earth's 

 crust to a depth of 113.7 kilometers. 



Observed Free-air Isostatic 



Elevation gravity anomaly anomaly 



Station Latitude Longitude m gal gal gal 



Atlanta, Ga 33°4S'.3 84°23:5 324.0 979.527 —.014 —.030 



Austin, Tex. (university) 30 17.2 97 44.2 189 979.286 -.016 —.017 



Baltimore, Md 39 17.8 76 37.3 30.5 980.1 14 +.005 +.002 



Beaufort, N. C 34 43.1 76 39.8 1.5 979.732 +.01 1 —.026 



Birmingham, Ala 33 30.8 86 48.8 179 979.539 —.027 —.038 



Bismarck, N. Dak 46 48.5 100 47.1 514.4 980.628 —.006 —.001 



Boise, Idaho 43 37.2 1 16 12.3 822.0 980.215 -.036 +.010 



Boston, Mass 42 21.6 7103.8 22 980.399 +.014 +.002 



Burbank, Okla 36 42.2 96 41.0 345 979.788 +.003 -.001 



Calais, Maine 45 1 1.2 67 16.9 38 980.634 .000 -.008 



Cambridge, Mass 42 22.8 71 07.8 14 980.401 +.012 +.001 



Charleston, S. C 32 47.2 79 56.0 6.1 979.549 —.010 —.026 



Charlottesville, Va 38 02.0 78 30.3 166 979.941 —.015 -.017 



Chicago, 111 4147.4 87 35.9 182 980.281 —.003 —.004 



Cincinnati, Ohio 39 08.3 84 25.3 245 980.007 —.022 —.024 



Cleveland, Ohio 41 30.4 81 36.6 210 980.244 —.006 —.006 



Cloudland, Tenn 36 06.2 82 07.9 1890 979.386 +.129 —.001 



Colorado Springs, Colo 38 50.8 104 49.5 1841.8 979.493 —.017 —.008 



Columbus, Ga 32 27.0 84 57.6 73.5 979.526 +.015 +.014 



Columbus, Ohio 39 57.8 82 59.4 231.0 980.092 —.014 —.014 



Denver, Colo 39 40.6 104 57.1 1639.5 979.612 —.034 —.016 



Duluth, Minn 46 47.0 92 06.4 215.8 980.761 +.037 +.048 



Durham, N. C 36 00.2 78 56 126 979.838 +.046 +.034 



El Paso, Tex 3146.3 106 29.0 1146.0 979.127 +.002 +.009 



Empire State Building, N. Y 40 44.9 73 59.2 16.2 980.269 +.027 +.020 



Eugene, Oreg 44 02.7 123 05.6 129 980.493 —.010 +.005 



Fort Dodge, Iowa 42 30.8 94 11.4 340.1 980.314 +.014 +.011 



Grand Canyon, Ariz 36 05.3 112 06.8 847.0 979.466 —.111 —.014 



Grand Canyon, Wyo 44 43.7 110 29.7 2386.0 979.902 +.033 —.002 



Grand Rapids, Mich 42 58.0 85 39.5 235.8 980.375 +.002 —.004 



Green River, Utah 38 59.4 1 10 09.9 1243 979.639 —.068 —.025 



Iowa City, Iowa 4139.6 9132.2 212.3 980.250 —.013 —.012 



Ithaca, N. Y 42 27.1 76 29.0 246.9 980.303 —.020 —.022 



Key West, Fla 24 33.6 8148.4 1 978.973 +.034 —.011 



Knoxville, Tenn 35 57.7 83 55 280 979.715 —.027 —.026 



Lancaster, N. H 44 29.5 71 34.3 261.8 980.489 —.014 —.014 



Las Vegas, N. Mex 35 35.8 105 13.1 1959.6 979.207 +.015 —.003 



Little Rock, Ark 34 44.9 92 16.4 89.0 979.724 +.027 +.028 



Madison, Wis 43 04.6 89 24.0 270 980.368 —.005 —.008 



Memphis, Tenn 35 08.7 90 03.3 80.3 979.743 +.010 +.008 



Miles City, Mont 46 24.2 105 50 718 980.542 +.008 +.028 



Minneapolis, Minn 44 58.7 93 13.9 256.1 980.600 +.052 +.055 



Mitchell, S. Dak 43 41 .8 98 01 .8 408 980.378 —.003 —.002 



Mount Hamilton, Calif 37 20.4 12138.6 1281.7 979.663 +.112 —.004 



New Orleans, La 29 56.9 90 04.3 2.4 979.326 —.007 —.020 



New York, N. Y 40 48.5 73 57.7 38.1 980.270 +.029 +.019 



Oberlin, Ohio 41 17 5 82 13.2 248 980.208 —.011 —.013 



Philadelphia, Pa 39 57.1 75 11.7 15.8 980.199 +.028 +.018 



Pike's Peak, Colo 38 50.4 105 02.5 4293.1 978.957 +.203 +.018 



Pittsburgh, Pa 40 27.4 80 00.6 235 980.121 -.027 —.027 



Prestonsburgh, Ky 37 40.6 82 45.6 193 979.884 —.032 —.028 



Princeton, N. J 40 21.0 74 39.5 64.0 980.181 —.011 —.025 



(continued) 



SMITHSONIAN PHYSICAL TABLES 



