Preliminary Reference Earth Model (PREM) (Dziewonski & Anderson, 1981)
Region Radius Ks P g
(km) (m/s) (m/s) (kg/m3) (Gpa) (Gpa) (Gpa) (m/s2)
Inner Core 0.0 11266.20 3667.80 13088.48 1425.3 176.1 0.4407 363.850 0.0000
200.0 11255.93 3663.42 13079.77 1423.1 175.5 0.4408 362.900 0.7311
400.0 11237.12 3650.27 13053.64 1416.4 173.9 0.4410 360.030 1.4604
600.0 11205.76 3628.35 13010.09 1405.3 171.3 0.4414 355.280 2.1862
800.0 11161.86 3597.67 12949.12 1389.8 167.6 0.4420 348.670 2.9068
1000.0 11105.42 3558.23 12870.73 1370.1 163.0 0.4428 340.240 3.6203
1200.0 11036.43 3510.02 12774.93 1346.2 157.4 0.4437 330.050 4.3251
1221.5 11028.27 3504.32 12763.60 1343.4 156.7 0.4438 328.850 4.4002
Outer Core 1221.5 10355.68 0.00 12166.34 1304.7 0.0 0.5000 328.850 4.4002
1400.0 10249.59 0.00 12069.24 1267.9 0.0 0.5000 318.750 4.9413
1600.0 10122.91 0.00 11946.82 1224.2 0.0 0.5000 306.150 5.5548
1800.0 9985.54 0.00 11809.00 1177.5 0.0 0.5000 292.220 6.1669
2000.0 9834.96 0.00 11654.78 1127.3 0.0 0.5000 277.040 6.7715
2200.0 9668.65 0.00 11483.11 1073.5 0.0 0.5000 260.680 7.3645
2400.0 9484.09 0.00 11292.98 1015.8 0.0 0.5000 243.250 7.9425
2600.0 9278.76 0.00 11083.35 954.2 0.0 0.5000 224.850 8.5023
2800.0 9050.15 0.00 10853.21 888.9 0.0 0.5000 205.600 9.0414
3000.0 8795.73 0.00 10601.52 820.2 0.0 0.5000 185.640 9.5570
3200.0 8512.98 0.00 10327.26 748.4 0.0 0.5000 165.120 10.0464
3400.0 8199.39 0.00 10029.40 674.3 0.0 0.5000 144.190 10.5065
3480.0 8064.82 0.00 9903.49 644.1 0.0 0.5000 135.750 10.6823
D'' 3480.0 13716.60 7264.66 5566.45 655.6 293.8 0.3051 135.750 10.6823
3600.0 13687.53 7265.75 5506.42 644.0 290.7 0.3038 128.710 10.5204
3630.0 13680.41 7265.97 5491.45 641.2 289.9 0.3035 126.970 10.4844
Lower mantle 3630.0 13680.41 7265.97 5491.45 641.2 289.9 0.3035 126.970 10.4844
3800.0 13447.42 7188.92 5406.81 609.5 279.4 0.3012 117.350 10.3095
4000.0 13245.32 7099.74 5307.24 574.4 267.5 0.2984 106.390 10.1580
4200.0 13015.79 7010.53 5207.13 540.9 255.9 0.2957 95.760 10.0535
4400.0 12783.89 6919.57 5105.90 508.5 244.5 0.2928 85.430 9.9859
4600.0 12544.66 6825.12 5002.99 476.6 233.1 0.2898 75.360 9.9474
4800.0 12293.16 6725.48 4897.83 444.8 221.5 0.2864 65.520 9.9314
5000.0 12024.45 6618.91 4789.83 412.8 209.8 0.2826 55.900 9.9326
5200.0 11733.57 6563.70 4678.44 380.3 197.9 0.2783 46.490 9.9467
5400.0 11415.60 6378.13 4563.07 347.1 185.6 0.2731 37.290 9.9698
5600.0 11065.57 6240.46 4443.17 313.3 173.0 0.2668 28.290 9.9985
5600.0 11065.57 6240.46 4443.17 313.3 173.0 0.2668 28.290 9.9985
5701.0 10751.31 5945.08 4380.71 299.9 154.8 0.2798 23.830 10.0143
Transition Zone 5701.0 10266.22 5570.20 3992.14 255.6 123.9 0.2914 23.830 10.0143
5771.0 10157.82 5516.01 3975.84 248.9 121.0 0.2909 21.040 10.0038
5771.0 10157.82 5516.01 3975.84 248.9 121.0 0.2909 21.040 10.0038
5871.0 9645.88 5224.28 3849.80 218.1 105.1 0.2924 17.130 9.9883
5971.0 9133.97 4932.59 3723.78 189.9 90.6 0.2942 13.350 9.9686
5971.0 8905.22 4769.89 3543.25 173.5 80.6 0.2988 13.350 9.9686
6061.0 8732.09 4706.90 3489.51 163.0 77.3 0.2952 10.200 9.9361
6151.0 8558.96 4643.91 3435.78 152.9 74.1 0.2914 7.110 9.9048
Low Velocity Zone 6151.0 7989.70 4418.85 3359.50 127.0 65.6 0.2797 7.110 9.9048
6221.0 8033.70 4443.61 3367.10 128.7 66.5 0.2796 4.780 9.8783
6291.0 8076.88 4469.53 3374.71 130.3 67.4 0.2793 2.450 9.8553
LID 6291.0 8076.88 4469.53 3374.71 130.3 67.4 0.2793 2.450 9.8553
6346.6 8110.61 4490.94 3380.76 131.5 68.2 0.2789 0.604 9.8394
Crust 6346.6 6800.00 3900.00 2900.00 75.3 44.1 0.2549 0.604 9.8394
6356.0 6800.00 3900.00 2900.00 75.3 44.1 0.2549 0.337 9.8332
6356.0 5800.00 3200.00 2600.00 52.0 26.6 0.2812 0.337 9.8332
6368.0 5800.00 3200.00 2600.00 52.0 26.6 0.2812 0.300 9.8222
Ocean 6368.0 1450.00 0.00 1020.00 2.1 0.0 0.5000 0.300 9.8222
6371.0 1450.00 0.00 1020.00 2.1 0.0 0.5000 0.000 9.8156