Geoscience Reference
In-Depth Information
Appendix 9
The Preliminary Reference Earth Model,
isotropic version - PREM
Radius
(km)
Depth
(km)
α
(km s
−1
)
β
(km s
−1
)
Density
(kg m
−3
)
Pressure
(GPa)
Gravity
(m s
−2
)
0
6371
11.2622
3.6678
13088.5
364.0
0.00
100
6271
11.2606
3.6667
13086.3
363.7
0.37
200
6171
11.2559
3.6634
13079.8
363.0
0.73
300
6071
11.2481
3.6579
13068.9
361.8
1.10
400
5971
11.2371
3.6503
13053.7
360.2
1.46
500
5871
11.2230
3.6404
13034.1
358.0
1.82
600
5771
11.2058
3.6284
13010.1
355.4
2.19
700
5671
11.1854
3.6141
12981.8
352.3
2.55
800
5571
11.1619
3.5977
12949.1
348.8
2.91
900
5471
11.1352
3.5790
12912.1
344.8
3.27
1000
5371
11.1054
3.5582
12870.8
340.4
3.62
1100
5271
11.0725
3.5352
12825.0
335.5
3.98
1200
5171
11.0364
3.5100
12775.0
330.2
4.33
1221.5
5149.5
11.0283
3.5043
12763.6
329.0
4.40
1221.5
5149.5
10.3557
0.0
12166.3
329.0
4.40
1300
5071
10.3097
0.0
12125.0
324.7
4.64
1400
4971
10.2496
0.0
12069.2
318.9
4.94
1500
4871
10.1875
0.0
12009.9
312.7
5.25
1600
4771
10.1229
0.0
11946.8
306.3
5.56
1700
4671
10.0558
0.0
11879.9
299.5
5.86
1800
4571
9.9856
0.0
11809.0
292.3
6.17
1900
4471
9.9121
0.0
11734.0
284.9
6.47
2000
4371
9.8350
0.0
11654.8
277.1
6.77
2100
4271
9.7540
0.0
11571.2
269.1
7.07
2200
4171
9.6687
0.0
11483.1
260.8
7.37
2300
4071
9.5788
0.0
11390.4
252.2
7.66
2400
3971
9.4841
0.0
11190.7
234.2
8.23
2600
3771
9.2788
0.0
11083.4
224.9
8.51
2700
3671
9.1676
0.0
10970.9
215.4
8.78
(
cont.
)
651
