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2025/share/magnitudes/IDC/qfvc.mb

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n # Q-factor of P waves according to Veith-Clawson (1972)
11 # number of depth samples
0.00 15.00 40.00 100.00 200.00 300.00 400.00 500.00 600.00 700.00
800.00
181 # number of distance samples
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00
10.00 11.00 12.00 13.00 14.00 15.00 16.00 17.00 18.00 19.00
20.00 21.00 22.00 23.00 24.00 25.00 26.00 27.00 28.00 29.00
30.00 31.00 32.00 33.00 34.00 35.00 36.00 37.00 38.00 39.00
40.00 41.00 42.00 43.00 44.00 45.00 46.00 47.00 48.00 49.00
50.00 51.00 52.00 53.00 54.00 55.00 56.00 57.00 58.00 59.00
60.00 61.00 62.00 63.00 64.00 65.00 66.00 67.00 68.00 69.00
70.00 71.00 72.00 73.00 74.00 75.00 76.00 77.00 78.00 79.00
80.00 81.00 82.00 83.00 84.00 85.00 86.00 87.00 88.00 89.00
90.00 91.00 92.00 93.00 94.00 95.00 96.00 97.00 98.00 99.00
100.00 101.00 102.00 103.00 104.00 105.00 106.00 107.00 108.00 109.00
110.00 111.00 112.00 113.00 114.00 115.00 116.00 117.00 118.00 119.00
120.00 121.00 122.00 123.00 124.00 125.00 126.00 127.00 128.00 129.00
130.00 131.00 132.00 133.00 134.00 135.00 136.00 137.00 138.00 139.00
140.00 141.00 142.00 143.00 144.00 145.00 146.00 147.00 148.00 149.00
150.00 151.00 152.00 153.00 154.00 155.00 156.00 157.00 158.00 159.00
160.00 161.00 162.00 163.00 164.00 165.00 166.00 167.00 168.00 169.00
170.00 171.00 172.00 173.00 174.00 175.00 176.00 177.00 178.00 179.00
180.00
# Q factor for mb at z = 0.00
0.301
1.191
2.371
2.501
2.851
3.061
3.201
3.321
3.401
3.451
3.491
3.531
3.551
3.561
3.561
3.551
3.511
3.401
3.281
3.091
3.071
3.101
3.151
3.241
3.341
3.451
3.551
3.651
3.721
3.741
3.721
3.681
3.661
3.661
3.651
3.641
3.641
3.641
3.631
3.631
3.621
3.621
3.621
3.631
3.631
3.641
3.641
3.651
3.661
3.661
3.671
3.671
3.681
3.691
3.691
3.701
3.701
3.711
3.721
3.721
3.731
3.741
3.741
3.751
3.751
3.761
3.761
3.771
3.781
3.781
3.791
3.801
3.801
3.811
3.811
3.821
3.831
3.831
3.841
3.841
3.851
3.861
3.871
3.881
3.891
3.911
3.941
3.961
3.981
4.021
4.061
4.101
4.151
4.211
4.281
4.361
4.441
4.521
4.601
4.681
4.761
4.75
4.74
4.72
4.71
4.70
4.70
4.70
4.70
4.70
4.70
4.50
4.50
4.50
4.30
4.30
4.30
4.30
4.30
4.30
4.25
4.25
4.25
4.25
4.20
4.20
4.20
4.20
4.20
4.20
4.20
4.20
4.20
4.20
4.20
4.20
4.20
4.20
4.20
4.20
4.20
4.20
3.50
3.50
3.50
3.50
3.50
3.50
3.50
3.50
3.50
3.50
3.60
3.65
3.80
3.87
3.93
4.00
4.02
4.05
4.07
4.10
4.13
4.16
4.19
4.22
4.25
4.28
4.31
4.34
4.37
4.41
4.45
4.49
4.52
4.55
4.58
4.61
4.64
4.67
4.70
# Q factor for mb at z = 15.00
-1.519
3.221
2.321
2.531
2.831
3.031
3.161
3.271
3.341
3.391
3.431
3.461
3.481
3.491
3.491
3.471
3.411
3.301
3.151
3.011
3.011
3.051
3.121
3.191
3.291
3.391
3.491
3.571
3.631
3.651
3.631
3.611
3.591
3.581
3.571
3.561
3.551
3.551
3.541
3.541
3.541
3.541
3.541
3.541
3.541
3.551
3.551
3.561
3.561
3.571
3.581
3.581
3.591
3.601
3.601
3.611
3.621
3.621
3.631
3.641
3.641
3.651
3.651
3.661
3.661
3.671
3.681
3.681
3.691
3.691
3.701
3.701
3.711
3.721
3.721
3.731
3.731
3.741
3.741
3.751
3.751
3.761
3.761
3.771
3.791
3.811
3.831
3.851
3.881
3.921
3.961
4.001
4.051
4.111
4.191
4.271
4.351
4.431
4.511
4.591
4.671
4.66
4.65
4.63
4.62
4.61
4.61
4.61
4.61
4.61
4.61
4.41
4.41
4.41
4.21
4.21
4.21
4.21
4.21
4.21
4.16
4.16
4.16
4.16
4.11
4.11
4.11
4.11
4.11
4.11
4.11
4.11
4.11
4.11
4.11
4.11
4.11
4.11
4.11
4.11
4.11
4.11
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.51
3.56
3.71
3.78
3.84
3.91
3.93
3.96
3.98
4.01
4.04
4.07
4.10
4.13
4.16
4.19
4.22
4.25
4.28
4.32
4.36
4.40
4.43
4.46
4.49
4.52
4.55
4.58
4.61
# Q factor for mb at z = 40.00
-1.139
2.461
2.591
2.831
3.021
3.171
3.291
3.381
3.431
3.471
3.491
3.501
3.511
3.511
3.511
3.471
3.381
3.241
3.051
2.931
2.921
2.951
3.011
3.091
3.171
3.271
3.361
3.431
3.481
3.491
3.501
3.501
3.491
3.481
3.461
3.451
3.441
3.431
3.421
3.421
3.411
3.411
3.411
3.411
3.411
3.411
3.421
3.421
3.431
3.441
3.441
3.451
3.461
3.461
3.471
3.481
3.481
3.491
3.491
3.501
3.501
3.511
3.511
3.521
3.521
3.531
3.541
3.541
3.551
3.551
3.561
3.561
3.571
3.571
3.581
3.581
3.591
3.591
3.601
3.601
3.611
3.611
3.621
3.631
3.641
3.661
3.681
3.701
3.741
3.781
3.821
3.861
3.911
3.971
4.051
4.131
4.211
4.291
4.371
4.451
4.531
4.52
4.51
4.49
4.48
4.47
4.47
4.47
4.47
4.47
4.47
4.27
4.27
4.27
4.07
4.07
4.07
4.07
4.07
4.07
4.02
4.02
4.02
4.02
3.97
3.97
3.97
3.97
3.97
3.97
3.97
3.97
3.97
3.97
3.97
3.97
3.97
3.97
3.97
3.97
3.97
3.97
3.27
3.27
3.27
3.27
3.27
3.27
3.27
3.27
3.27
3.27
3.37
3.42
3.57
3.64
3.70
3.77
3.79
3.82
3.84
3.87
3.90
3.93
3.96
3.99
4.02
4.05
4.08
4.11
4.14
4.18
4.22
4.26
4.29
4.32
4.35
4.38
4.41
4.44
4.47
# Q factor for mb at z = 100.00
-0.499
-0.009
0.691
1.241
1.661
1.981
2.251
2.481
2.671
2.821
2.931
3.021
3.091
3.141
3.151
3.091
2.981
2.841
2.761
2.751
2.781
2.841
2.911
2.991
3.081
3.181
3.271
3.341
3.371
3.381
3.381
3.371
3.361
3.351
3.341
3.331
3.321
3.311
3.301
3.301
3.291
3.291
3.291
3.291
3.291
3.301
3.301
3.311
3.321
3.321
3.331
3.341
3.341
3.351
3.361
3.361
3.371
3.381
3.381
3.391
3.401
3.401
3.411
3.421
3.421
3.431
3.441
3.441
3.451
3.461
3.461
3.461
3.471
3.471
3.481
3.481
3.491
3.491
3.501
3.501
3.501
3.501
3.511
3.531
3.551
3.571
3.601
3.621
3.641
3.681
3.721
3.761
3.811
3.871
3.951
4.031
4.111
4.191
4.271
4.351
4.431
4.42
4.41
4.39
4.38
4.37
4.37
4.37
4.37
4.37
4.37
4.17
4.17
4.17
3.97
3.97
3.97
3.97
3.97
3.97
3.92
3.92
3.92
3.92
3.87
3.87
3.87
3.87
3.87
3.87
3.87
3.87
3.87
3.87
3.87
3.87
3.87
3.87
3.87
3.87
3.87
3.87
3.17
3.17
3.17
3.17
3.17
3.17
3.17
3.17
3.17
3.17
3.27
3.32
3.47
3.54
3.60
3.67
3.69
3.72
3.74
3.77
3.80
3.83
3.86
3.89
3.92
3.95
3.98
4.01
4.04
4.08
4.12
4.16
4.19
4.22
4.25
4.28
4.31
4.34
4.37
# Q factor for mb at z = 200.00
-0.059
0.111
0.471
0.851
1.191
1.491
1.761
1.991
2.181
2.331
2.441
2.511
2.551
2.561
2.531
2.481
2.451
2.461
2.491
2.541
2.601
2.681
2.761
2.861
2.961
3.041
3.101
3.131
3.141
3.151
3.151
3.141
3.131
3.121
3.111
3.101
3.101
3.091
3.091
3.091
3.081
3.081
3.091
3.091
3.101
3.111
3.111
3.121
3.131
3.131
3.141
3.151
3.161
3.161
3.171
3.181
3.181
3.191
3.201
3.211
3.211
3.221
3.231
3.231
3.241
3.251
3.251
3.261
3.271
3.281
3.281
3.291
3.301
3.301
3.311
3.311
3.321
3.321
3.321
3.331
3.331
3.331
3.341
3.351
3.361
3.381
3.401
3.441
3.481
3.521
3.561
3.611
3.671
3.741
3.821
3.901
3.981
4.061
4.141
4.221
4.301
4.29
4.28
4.26
4.25
4.24
4.24
4.24
4.24
4.24
4.24
4.04
4.04
4.04
3.84
3.84
3.84
3.84
3.84
3.84
3.79
3.79
3.79
3.79
3.74
3.74
3.74
3.74
3.74
3.74
3.74
3.74
3.74
3.74
3.74
3.74
3.74
3.74
3.74
3.74
3.74
3.74
3.04
3.04
3.04
3.04
3.04
3.04
3.04
3.04
3.04
3.04
3.14
3.19
3.34
3.41
3.47
3.54
3.56
3.59
3.61
3.64
3.67
3.70
3.73
3.76
3.79
3.82
3.85
3.88
3.91
3.95
3.99
4.03
4.06
4.09
4.12
4.15
4.18
4.21
4.24
# Q factor for mb at z = 300.00
0.201
0.291
0.491
0.741
0.991
1.231
1.441
1.621
1.771
1.891
1.991
2.061
2.091
2.121
2.161
2.201
2.251
2.311
2.371
2.441
2.521
2.601
2.691
2.781
2.861
2.921
2.961
2.981
2.991
2.991
2.981
2.971
2.961
2.961
2.951
2.941
2.941
2.941
2.931
2.931
2.931
2.941
2.941
2.951
2.951
2.961
2.971
2.971
2.981
2.991
3.001
3.001
3.011
3.021
3.031
3.031
3.041
3.051
3.061
3.061
3.071
3.081
3.091
3.101
3.101
3.111
3.121
3.131
3.141
3.141
3.151
3.161
3.161
3.171
3.181
3.181
3.191
3.191
3.201
3.201
3.201
3.211
3.221
3.241
3.261
3.291
3.311
3.331
3.371
3.411
3.451
3.501
3.561
3.641
3.721
3.801
3.881
3.961
4.041
4.121
4.201
4.19
4.18
4.16
4.15
4.14
4.14
4.14
4.14
4.14
4.14
3.94
3.94
3.94
3.74
3.74
3.74
3.74
3.74
3.74
3.69
3.69
3.69
3.69
3.64
3.64
3.64
3.64
3.64
3.64
3.64
3.64
3.64
3.64
3.64
3.64
3.64
3.64
3.64
3.64
3.64
3.64
2.94
2.94
2.94
2.94
2.94
2.94
2.94
2.94
2.94
2.94
3.04
3.09
3.24
3.31
3.37
3.44
3.46
3.49
3.51
3.54
3.57
3.60
3.63
3.66
3.69
3.72
3.75
3.78
3.81
3.85
3.89
3.93
3.96
3.99
4.02
4.05
4.08
4.10
4.14
# Q factor for mb at z = 400.00
0.381
0.421
0.551
0.711
0.901
1.081
1.251
1.401
1.531
1.651
1.751
1.841
1.921
1.981
2.041
2.101
2.171
2.251
2.321
2.401
2.481
2.571
2.651
2.731
2.801
2.841
2.861
2.871
2.861
2.841
2.831
2.821
2.811
2.811
2.811
2.811
2.811
2.811
2.811
2.811
2.821
2.821
2.831
2.841
2.841
2.851
2.861
2.871
2.871
2.881
2.891
2.901
2.911
2.921
2.931
2.941
2.941
2.951
2.961
2.971
2.981
2.981
2.991
3.001
3.011
3.021
3.031
3.041
3.041
3.051
3.061
3.071
3.071
3.081
3.091
3.091
3.101
3.101
3.111
3.111
3.111
3.131
3.151
3.171
3.191
3.211
3.231
3.251
3.291
3.331
3.381
3.431
3.501
3.581
3.661
3.741
3.821
3.901
3.981
4.061
4.141
4.13
4.12
4.10
4.09
4.08
4.08
4.08
4.08
4.08
4.08
3.88
3.88
3.88
3.68
3.68
3.68
3.68
3.68
3.68
3.63
3.63
3.63
3.63
3.58
3.58
3.58
3.58
3.58
3.58
3.58
3.58
3.58
3.58
3.58
3.58
3.58
3.58
3.58
3.58
3.58
3.58
2.88
2.88
2.88
2.88
2.88
2.88
2.88
2.88
2.88
2.88
2.98
3.03
3.18
3.25
3.31
3.38
3.40
3.43
3.45
3.48
3.51
3.54
3.57
3.60
3.63
3.66
3.69
3.72
3.75
3.79
3.83
3.87
3.90
3.93
3.96
3.99
4.02
4.05
4.08
# Q factor for mb at z = 500.00
0.521
0.551
0.631
0.751
0.881
1.031
1.171
1.301
1.421
1.541
1.641
1.731
1.821
1.901
1.981
2.061
2.141
2.221
2.301
2.371
2.451
2.521
2.581
2.631
2.671
2.691
2.691
2.681
2.681
2.681
2.671
2.671
2.671
2.671
2.671
2.671
2.671
2.681
2.681
2.691
2.701
2.701
2.711
2.721
2.731
2.731
2.741
2.751
2.761
2.771
2.781
2.791
2.801
2.811
2.821
2.831
2.841
2.841
2.851
2.861
2.871
2.881
2.891
2.901
2.911
2.921
2.921
2.931
2.941
2.951
2.961
2.971
2.981
2.981
2.991
3.001
3.001
3.001
3.011
3.011
3.021
3.031
3.041
3.061
3.081
3.101
3.131
3.171
3.211
3.251
3.301
3.361
3.431
3.511
3.591
3.671
3.751
3.831
3.911
3.991
4.071
4.06
4.05
4.03
4.02
4.01
4.01
4.01
4.01
4.01
4.01
3.81
3.81
3.81
3.61
3.61
3.61
3.61
3.61
3.61
3.56
3.56
3.56
3.56
3.51
3.51
3.51
3.51
3.51
3.51
3.51
3.51
3.51
3.51
3.51
3.51
3.51
3.51
3.51
3.51
3.51
3.51
2.81
2.81
2.81
2.81
2.81
2.81
2.81
2.81
2.81
2.81
2.91
2.96
3.11
3.18
3.24
3.31
3.33
3.36
3.38
3.41
3.44
3.47
3.50
3.53
3.56
3.59
3.62
3.65
3.68
3.72
3.76
3.80
3.83
3.86
3.89
3.92
3.95
3.98
4.01
# Q factor for mb at z = 600.00
0.641
0.661
0.721
0.801
0.911
1.031
1.141
1.251
1.361
1.471
1.571
1.671
1.771
1.861
1.941
2.021
2.101
2.171
2.241
2.311
2.371
2.431
2.471
2.491
2.501
2.501
2.491
2.491
2.481
2.481
2.481
2.491
2.501
2.511
2.521
2.531
2.541
2.541
2.551
2.561
2.571
2.581
2.591
2.601
2.611
2.621
2.631
2.641
2.651
2.661
2.671
2.681
2.691
2.701
2.711
2.721
2.731
2.741
2.751
2.761
2.771
2.781
2.791
2.801
2.811
2.821
2.831
2.841
2.851
2.861
2.861
2.871
2.881
2.891
2.891
2.901
2.911
2.911
2.921
2.921
2.931
2.941
2.961
2.981
3.001
3.031
3.061
3.101
3.141
3.181
3.241
3.301
3.381
3.461
3.541
3.621
3.701
3.781
3.861
3.941
4.021
4.01
4.00
3.98
3.97
3.96
3.96
3.96
3.96
3.96
3.96
3.76
3.76
3.76
3.56
3.56
3.56
3.56
3.56
3.56
3.51
3.51
3.51
3.51
3.46
3.46
3.46
3.46
3.46
3.46
3.46
3.46
3.46
3.46
3.46
3.46
3.46
3.46
3.46
3.46
3.46
3.46
2.76
2.76
2.76
2.76
2.76
2.76
2.76
2.76
2.76
2.76
2.86
2.91
3.06
3.13
3.19
3.26
3.28
3.31
3.33
3.36
3.39
3.42
3.45
3.48
3.51
3.54
3.57
3.60
3.63
3.67
3.71
3.75
3.78
3.81
3.84
3.87
3.90
3.93
3.96
# Q factor for mb at z = 700.00
0.741
0.761
0.801
0.871
0.951
1.051
1.141
1.241
1.341
1.441
1.531
1.621
1.711
1.791
1.871
1.941
2.011
2.081
2.141
2.181
2.211
2.231
2.241
2.241
2.251
2.261
2.271
2.281
2.291
2.301
2.311
2.331
2.341
2.351
2.361
2.371
2.391
2.401
2.411
2.421
2.431
2.451
2.461
2.471
2.481
2.491
2.511
2.521
2.531
2.541
2.561
2.571
2.581
2.591
2.611
2.621
2.631
2.641
2.651
2.671
2.681
2.691
2.701
2.711
2.721
2.731
2.741
2.751
2.761
2.771
2.781
2.791
2.791
2.801
2.801
2.811
2.821
2.821
2.821
2.831
2.841
2.861
2.881
2.901
2.931
2.961
2.991
3.031
3.071
3.121
3.181
3.251
3.331
3.411
3.491
3.571
3.651
3.731
3.811
3.891
3.971
3.96
3.95
3.93
3.92
3.91
3.91
3.91
3.91
3.91
3.91
3.71
3.71
3.71
3.51
3.51
3.51
3.51
3.51
3.51
3.46
3.46
3.46
3.46
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
2.71
2.71
2.71
2.71
2.71
2.71
2.71
2.71
2.71
2.71
2.81
2.86
3.01
3.08
3.14
3.21
3.23
3.26
3.28
3.31
3.34
3.37
3.40
3.43
3.46
3.49
3.52
3.55
3.58
3.62
3.66
3.70
3.73
3.76
3.79
3.82
3.85
3.88
3.91
# Q factor for mb at z = 800.00
0.821
0.831
0.861
0.921
0.981
1.061
1.141
1.221
1.301
1.391
1.471
1.551
1.621
1.691
1.751
1.801
1.851
1.901
1.941
1.981
2.011
2.041
2.061
2.081
2.101
2.121
2.141
2.161
2.181
2.201
2.221
2.241
2.261
2.271
2.291
2.301
2.321
2.341
2.351
2.371
2.381
2.391
2.411
2.421
2.431
2.451
2.461
2.471
2.481
2.491
2.511
2.521
2.531
2.541
2.551
2.561
2.571
2.591
2.601
2.611
2.621
2.631
2.641
2.651
2.661
2.671
2.681
2.691
2.701
2.711
2.721
2.731
2.741
2.751
2.761
2.771
2.771
2.781
2.781
2.791
2.801
2.821
2.851
2.881
2.911
2.951
2.991
3.031
3.081
3.141
3.211
3.271
3.331
3.411
3.491
3.571
3.651
3.731
3.811
3.891
3.971
3.96
3.95
3.93
3.92
3.91
3.91
3.91
3.91
3.91
3.91
3.71
3.71
3.71
3.51
3.51
3.51
3.51
3.51
3.51
3.46
3.46
3.46
3.46
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
3.41
2.71
2.71
2.71
2.71
2.71
2.71
2.71
2.71
2.71
2.71
2.81
2.86
3.01
3.08
3.14
3.21
3.23
3.26
3.28
3.31
3.34
3.37
3.40
3.43
3.46
3.49
3.52
3.55
3.58
3.62
3.66
3.70
3.73
3.76
3.79
3.82
3.85
3.88
3.91
#@(#) atten.qfvc_ex 2.1 06 Jun 1996