Geoscience Reference
In-Depth Information
Table 19.2
Q S and Q P as function of depth and period for model ABM
Q S
Q P
Depth
(km)
1s
10s
100s
1000s
1s
10s
100s
1000s
5142
100
1000
10,000
10 5
511
454
3322
3.3 × 10 4
4044
4518
493
1000
10 4
2887
7530
753
600
6000
2843
184
130
92
315
427
345
247
846
2400
184
130
92
315
427
345
247
846
2200
11 350
1135
366
259
2938
2687
942
668
671
8919
892
353
250
2921
2060
866
615
421
5691
569
330
234
741
840
819
603
421
190
134
95
254
302
296
244
659
200
157
111
90
900
270
256
237
2365
11
200
141
100
181
287
262
207
377
11
500
500
500
500
487
767
1168
1232
Table 19.3
Average mantle Q values as function of period. Model ABM
Region
0.1s
1s
4s
10s
100s
1000s
Q S
Upper mantle
379
267
210
173
127
295
Lower mantle
1068
721
520
382
211
266
Whole mantle
691
477
360
280
176
274
Q P
Upper mantle
513
362
315
354
311
727
Lower mantle
586
1228
1262
979
550
671
Whole mantle
562
713
662
639
446
687
Q ( 0 S 2 )
3232 s
12 h
14 mos
596
514
463
Table 19.4
Relaxation times and Q , for bulk attenuation at various periods
Q K
Region
τ 1 (s)
τ 2 (s)
1s
10s
100s
1000s
10 4
10 5
Upper mantle
0
3.33
479
1200
1.2
1.2
×
×
10 4
10 5
10 6
Lower mantle
0
0.20
2000
2
2
2
×
×
×
Outer core
15.1
66.7
7530
753
600
6000
9.04
40.0
4518
493
1000
10 000
10 4
Inner core
3.01
13.3
1506
418
3000
3
×
Q K (min)
=
400,
α =
0.15.
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