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Table 3 Values of Q (Figure9) estimated at different frequencies using N= 1 and b= 0.21 in equation ( 4) with the RMS values reported by the inversion process

From: S-wave attenuation in northeastern Sonora, Mexico, near the faults that ruptured during the earthquake of 3 May 1887 Mw 7.5

Frecuency (Hz)

Q

RMS values

0.50

121.3

0.358

1.00

132.6

0.385

1.26

229.0

0.413

1.58

212.6

0.399

2.00

206.5

0.438

2.51

325.3

0.430

3.16

282.8

0.418

3.98

334.3

0.433

5.01

381.7

0.426

6.31

475.6

0.401

7.94

452.3

0.376

10.0

504.5

0.381

12.59

695.7

0.377

15.85

1054.0

0.367

19.95

1672.0

0.373

25.12

2747.0

0.403

31.62

2201.0

0.412

39.81

1819.0

0.381

50.12

2955.0

0.364

63.10

3498.0

0.359