Data Report
Bulletin / 1997-04
Contributed by CUPWA
Date 1997-04-01
Origin Time 0811 55.02 +- 8.05
Zone 53
Easting 399.05 +- 26.87 Longitude 134.038
Northing 7838.24 +- 63.75 Latitude -19.548
Depth 5.00 +- 34.18 N
Arrival times = 8 S.D. = 1.034 Seismographs = 4
Nearest recorder = 54.9 km Gap = 278.9 deg Accuracy = C
Effects Code = Imax = 0 Fault =
18 km NW (304 deg) of TCTY
NORTHERN TERRITORY
857 km SE (157 deg) of DARWIN
19 km NW (307 deg) of TENNANT CREEK
Record Dur Sync Unc Resp Seismometer Recorder Pol
ASPA 0.00 Seismograph details unknown
WB2 0.00 Seismograph details unknown
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 3.7
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
WB2 e P 63.80 0.10 0.93 64.01 -0.21 54.9 143 5.6 5.6
ASPA e P 117.60 0.10 0.77 116.55 1.05 458.0 181 -42.2 42.2
ASPA e S 161.50 0.20 0.60 162.33 -0.83 458.0 181 -40.3 40.3
WARB e P 188.90 0.20 0.61 189.20 -0.30 1058.9 224 -42.2 42.2
WARB e S 289.80 0.20 0.55 288.81 0.99 1058.9 224 -40.3 40.3
WARB e SG 345.90 0.50 0.46 347.53 -1.63 1058.9 224 0.3 0.3
FORT e P 227.50 0.10 0.70 228.73 -1.23 1386.1 204 -42.2 42.2
FORT e S 359.00 0.20 0.55 357.65 1.35 1386.1 204 -40.3 40.3
8 times used, S = 1.034
Deferred Data
ASPA e PG 127.50 0.50 0.56 129.74 -2.24 458.0 181 0.7 0.7
MEEK e P 271.20 0.50 0.51 276.71 -5.51 1782.6 240 -42.2 42.2
MEEK e S 436.40 1.00 0.40 441.18 -4.78 1782.6 240 -40.3 40.3
Velocity Ratios
ASPA WARB FORT
ASPA 1.70 1.80 1.80
0.01 0.01 0.01
WARB 1.80 1.75 1.79
0.01 0.00 0.02
FORT 1.80 1.79 1.76
0.01 0.02 0.00
Date 1997-04-01
Origin Time 2240 48.89 +- 2.75
Zone 50
Easting 565.60 +- 40.95 Longitude 117.690
Northing 6520.28 +- 21.28 Latitude -31.450
Depth 5.00 +- 23.33 N
Arrival times = 6 S.D. = 0.192 Seismographs = 4
Nearest recorder = 17.0 km Gap = 202.5 deg Accuracy = C
Effects Code = Imax = 0 Fault =
5 km NE ( 50 deg) of KBS
WESTERN AUSTRALIA
183 km E ( 73 deg) of PERTH
20 km N (352 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
KLB 0.00 Seismograph details unknown
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.4
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB e S 53.70 0.20 0.79 53.81 -0.11 17.0 157 17.3 17.3
BAL i-P 70.30 0.10 1.23 70.23 0.07 132.5 314 -30.8 30.8
BAL i S 85.40 0.10 1.11 85.52 -0.12 132.5 314 2.3 2.3
MUN e P 73.10 0.10 0.85 72.98 0.12 152.1 246 -30.8 30.8
NWAO e P 75.80 1.00 0.53 75.37 0.43 169.2 194 -30.8 30.8
NWAO e S 95.00 0.50 0.55 95.35 -0.35 169.2 194 -40.3 40.3
6 times used, S = 0.192
Velocity Ratios
BAL NWAO
BAL 1.71 0.00
0.01 0.00
NWAO 0.00 1.71
0.00 0.09
Date 1997-04-03
Origin Time 0739 58.97 +- 0.38
Zone 50
Easting 566.12 +- 3.84 Longitude 117.696
Northing 6518.46 +- 3.18 Latitude -31.467
Depth 5.00 +- 5.97 N
Arrival times = 10 S.D. = 0.226 Seismographs = 5
Nearest recorder = 15.1 km Gap = 190.0 deg Accuracy = B
Effects Code = Imax = 0 Fault =
4 km E ( 72 deg) of KBS
WESTERN AUSTRALIA
183 km E ( 73 deg) of PERTH
18 km N (353 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.0
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i P 61.50 0.10 1.46 61.59 -0.09 15.1 156 19.3 19.3
KLB i S 63.40 0.10 1.31 63.40 -0.00 15.1 156 19.3 19.3
BAL i P 80.80 0.10 1.23 80.55 0.25 134.1 315 -30.8 30.8
BAL i S 95.80 0.10 1.11 96.06 -0.26 134.1 315 2.3 2.3
MUN i P 83.20 0.10 1.22 83.03 0.17 151.9 247 -30.8 30.8
MUN e S 100.80 0.10 0.77 100.97 -0.17 151.9 247 2.0 2.0
NWAO e P 84.80 0.50 0.61 85.23 -0.43 167.6 194 -30.8 30.8
NWAO e S 105.40 0.50 0.55 105.02 0.38 167.6 194 -23.9 23.9
MRWA e PMP 104.00 0.30 0.39 103.84 0.16 298.0 326 -31.8 31.8
MRWA e SMS 138.70 0.20 0.35 138.63 0.07 298.0 326 -25.4 25.4
10 times used, S = 0.226
Deferred Data
MRWA e P 104.00 0.10 0.80 101.12 2.88 298.0 326 -42.2 42.2
MRWA e S 138.70 0.10 0.72 132.54 6.16 298.0 326 -40.3 40.3
Velocity Ratios
KLB BAL MUN NWAO
KLB 1.75 1.68 1.72 1.80
0.11 0.03 0.03 0.07
BAL 1.68 1.69 0.00 0.00
0.03 0.01 0.00 0.00
MUN 1.72 0.00 1.73 0.00
0.03 0.00 0.01 0.00
NWAO 1.80 0.00 0.00 1.80
0.07 0.00 0.00 0.06
Date 1997-04-03
Origin Time 0744 20.33 +- 0.40
Zone 50
Easting 565.09 +- 3.64 Longitude 117.685
Northing 6518.68 +- 3.02 Latitude -31.465
Depth 5.00 +- 6.34 N
Arrival times = 11 S.D. = 0.279 Seismographs = 5
Nearest recorder = 15.8 km Gap = 186.7 deg Accuracy = B
Effects Code = Imax = 0 Fault =
3 km NE ( 64 deg) of KBS
WESTERN AUSTRALIA
182 km E ( 73 deg) of PERTH
19 km N (350 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.1
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i P 22.90 0.10 1.45 23.05 -0.15 15.8 153 18.6 18.6
KLB i S 24.90 0.10 1.31 24.93 -0.03 15.8 153 18.6 18.6
BAL i P 41.90 0.10 1.23 41.78 0.12 133.3 315 -30.8 30.8
BAL i S 56.80 0.10 1.11 57.18 -0.38 133.3 315 2.3 2.3
MUN i P 44.40 0.10 1.22 44.27 0.13 151.1 247 -30.8 30.8
MUN i S 62.00 0.10 1.09 62.08 -0.08 151.1 247 2.0 2.0
NWAO e P 47.10 0.50 0.61 46.58 0.52 167.5 194 -30.8 30.8
NWAO e S 66.50 0.50 0.55 66.37 0.13 167.5 194 -23.9 23.9
MRWA e PMP 65.20 0.30 0.39 65.10 0.10 297.2 326 -31.8 31.8
MRWA e S 94.60 0.30 0.58 93.74 0.86 297.2 326 -40.3 40.3
MRWA e SMS 99.90 0.20 0.35 99.80 0.10 297.2 326 -25.4 25.4
11 times used, S = 0.279
Deferred Data
MRWA e P 65.20 0.10 0.80 62.39 2.81 297.2 326 -42.2 42.2
Velocity Ratios
KLB BAL MUN NWAO
KLB 1.78 1.68 1.73 1.72
0.11 0.03 0.03 0.07
BAL 1.68 1.69 0.00 0.00
0.03 0.01 0.00 0.00
MUN 1.73 0.00 1.73 0.00
0.03 0.00 0.01 0.00
NWAO 1.72 0.00 0.00 1.72
0.07 0.00 0.00 0.05
Date 1997-04-03
Origin Time 0746 5.74 +- 1.14
Zone 50
Easting 565.66 +- 8.92 Longitude 117.691
Northing 6518.97 +- 8.52 Latitude -31.462
Depth 5.00 +- 17.22 N
Arrival times = 7 S.D. = 0.360 Seismographs = 4
Nearest recorder = 15.8 km Gap = 200.5 deg Accuracy = C
Effects Code = Imax = 0 Fault =
4 km NE ( 64 deg) of KBS
WESTERN AUSTRALIA
183 km E ( 73 deg) of PERTH
19 km N (352 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.7
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i P 8.30 0.10 1.45 8.46 -0.16 15.8 155 18.6 18.6
KLB i S 10.20 0.10 1.31 10.34 -0.14 15.8 155 18.6 18.6
BAL i P 27.70 0.10 1.23 27.22 0.48 133.5 315 -30.8 30.8
BAL i S 42.20 0.10 1.11 42.64 -0.44 133.5 315 2.3 2.3
MUN i P 30.00 0.10 1.22 29.77 0.23 151.7 247 -30.8 30.8
MUN i S 47.40 0.10 1.09 47.67 -0.27 151.7 247 2.0 2.0
NWAO e S 52.50 0.10 0.76 51.88 0.62 168.0 194 -23.9 23.9
7 times used, S = 0.360
Deferred Data
MRWA e S 80.50 0.10 0.72 79.17 1.33 297.3 326 -40.3 40.3
Velocity Ratios
KLB BAL MUN
KLB 1.74 1.65 1.71
0.11 0.03 0.03
BAL 1.65 1.66 0.00
0.03 0.01 0.00
MUN 1.71 0.00 1.72
0.03 0.00 0.01
Date 1997-04-03
Origin Time 0832 50.69 +- 0.80
Zone 50
Easting 563.45 +- 6.29 Longitude 117.668
Northing 6516.19 +- 7.38 Latitude -31.487
Depth 5.00 +- 17.79 N
Arrival times = 6 S.D. = 0.136 Seismographs = 3
Nearest recorder = 14.5 km Gap = 186.5 deg Accuracy = C
Effects Code = Imax = 0 Fault =
2 km SE (114 deg) of KBS
WESTERN AUSTRALIA
180 km E ( 74 deg) of PERTH
17 km N (343 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.5
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i P 53.10 0.10 1.46 53.20 -0.10 14.5 143 20.1 20.1
KLB i S 55.10 0.10 1.32 54.95 0.15 14.5 143 20.1 20.1
BAL i P 72.10 0.10 1.23 72.23 -0.13 133.9 316 -30.8 30.8
BAL i S 87.90 0.10 1.11 87.71 0.19 133.9 316 2.3 2.3
MUN i P 74.20 0.10 1.22 74.28 -0.08 148.6 248 -30.8 30.8
MUN i S 91.80 0.10 1.10 91.76 0.04 148.6 248 2.0 2.0
6 times used, S = 0.136
Velocity Ratios
KLB BAL MUN
KLB 1.83 1.73 1.74
0.12 0.03 0.03
BAL 1.73 1.74 0.00
0.03 0.01 0.00
MUN 1.74 0.00 1.75
0.03 0.00 0.01
Date 1997-04-03
Origin Time 0905 45.21 +- 1.36
Zone 50
Easting 564.35 +- 11.67 Longitude 117.677
Northing 6518.46 +- 11.53 Latitude -31.467
Depth 5.00 +- 26.48 N
Arrival times = 6 S.D. = 0.228 Seismographs = 3
Nearest recorder = 15.9 km Gap = 194.9 deg Accuracy = C
Effects Code = Imax = 0 Fault =
3 km NE ( 62 deg) of KBS
WESTERN AUSTRALIA
181 km E ( 73 deg) of PERTH
19 km N (347 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.8
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i P 47.90 0.10 1.45 47.94 -0.04 15.9 150 18.4 18.4
KLB i S 49.80 0.10 1.31 49.84 -0.04 15.9 150 18.4 18.4
BAL i P 67.00 0.10 1.23 66.61 0.39 132.9 315 -30.8 30.8
BAL i S 81.60 0.10 1.11 81.95 -0.35 132.9 315 2.3 2.3
MUN i P 69.00 0.10 1.22 69.04 -0.04 150.3 247 -30.8 30.8
MUN i S 86.80 0.10 1.09 86.75 0.05 150.3 247 2.0 2.0
6 times used, S = 0.228
Deferred Data
MRWA e P 90.60 0.10 0.80 87.24 3.36 297.0 326 -42.2 42.2
MRWA e S 124.50 0.10 0.72 118.57 5.93 297.0 326 -40.3 40.3
Velocity Ratios
KLB BAL MUN
KLB 1.71 1.66 1.75
0.10 0.03 0.03
BAL 1.66 1.67 0.00
0.03 0.01 0.00
MUN 1.75 0.00 1.75
0.03 0.00 0.01
Date 1997-04-06
Origin Time 0221 23.50 +- 7.51
Zone 50
Easting 277.13 +- 77.49 Longitude 114.809
Northing 7340.64 +- 30.97 Latitude -24.031
Depth 5.00 +- 77.62 N
Arrival times = 6 S.D. = 0.299 Seismographs = 4
Nearest recorder = 164.6 km Gap = 170.4 deg Accuracy = C
Effects Code = Imax = 0 Fault =
100 km S (164 deg) of LP03
WESTERN AUSTRALIA
884 km N (353 deg) of PERTH
149 km NE ( 51 deg) of CARNARVON
Record Dur Sync Unc Resp Seismometer Recorder Pol
GIRL 0.00 Seismograph details unknown
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.6
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
GIRL e P 49.20 0.30 0.68 49.32 -0.12 164.6 339 -30.8 30.8
GIRL e S 68.80 0.50 0.55 68.77 0.03 164.6 339 -23.9 23.9
MEEK e P 88.10 0.50 0.55 87.64 0.46 479.6 127 -42.2 42.2
MEEK e S 135.00 0.50 0.50 135.35 -0.35 479.6 127 -40.3 40.3
MRWA e S 158.00 0.50 0.49 157.86 0.14 586.7 168 -40.3 40.3
BAL e SG 231.00 2.00 0.36 231.34 -0.34 752.3 166 0.4 0.4
6 times used, S = 0.299
Velocity Ratios
GIRL MEEK
GIRL 1.76 1.70
0.04 0.06
MEEK 1.70 1.73
0.06 0.02
Date 1997-04-06
Origin Time 1811 3.36 +- 0.64
Zone 50
Easting 563.50 +- 4.74 Longitude 117.669
Northing 6516.26 +- 4.58 Latitude -31.487
Depth 5.00 +- 8.41 N
Arrival times = 10 S.D. = 0.393 Seismographs = 5
Nearest recorder = 14.5 km Gap = 176.4 deg Accuracy = C
Effects Code = Imax = 0 Fault =
2 km E (111 deg) of KBS
WESTERN AUSTRALIA
180 km E ( 74 deg) of PERTH
17 km N (343 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.9
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB e P 5.80 0.10 1.02 5.88 -0.08 14.5 143 20.1 20.1
KLB e S 7.50 0.10 0.92 7.63 -0.13 14.5 143 20.1 20.1
BAL e P 25.00 0.10 0.86 24.90 0.10 133.9 316 -30.8 30.8
BAL e S 40.00 0.10 0.77 40.38 -0.38 133.9 316 2.3 2.3
MUN e P 26.30 0.20 0.74 26.97 -0.67 148.7 248 -30.8 30.8
MUN e S 44.50 0.20 0.67 44.46 0.04 148.7 248 2.0 2.0
NWAO e P 29.60 0.30 0.68 29.22 0.38 164.8 194 -30.8 30.8
NWAO e S 49.20 0.30 0.61 48.70 0.50 164.8 194 -23.9 23.9
MRWA e S 77.70 0.10 0.72 77.02 0.68 298.4 327 -40.3 40.3
MRWA e SMS 83.00 0.10 0.40 83.12 -0.12 298.4 327 -25.4 25.4
10 times used, S = 0.393
Velocity Ratios
KLB BAL MUN NWAO
KLB 1.70 1.69 1.80 1.75
0.12 0.03 0.04 0.05
BAL 1.69 1.69 0.00 0.00
0.03 0.01 0.00 0.00
MUN 1.80 0.00 1.79 0.00
0.04 0.00 0.02 0.00
NWAO 1.75 0.00 0.00 1.75
0.05 0.00 0.00 0.03
Date 1997-04-06
Origin Time 2053 25.62 +- 0.69
Zone 50
Easting 565.33 +- 6.87 Longitude 117.688
Northing 6517.96 +- 5.99 Latitude -31.471
Depth 5.00 +- 10.82 N
Arrival times = 9 S.D. = 0.382 Seismographs = 5
Nearest recorder = 15.0 km Gap = 186.3 deg Accuracy = C
Effects Code = Imax = 0 Fault =
3 km E ( 75 deg) of KBS
WESTERN AUSTRALIA
182 km E ( 74 deg) of PERTH
18 km N (350 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.5
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i P 28.10 0.10 1.46 28.21 -0.11 15.0 152 19.4 19.4
KLB i S 30.00 0.10 1.31 30.02 -0.02 15.0 152 19.4 19.4
BAL e P 47.20 0.10 0.86 47.16 0.04 133.9 315 -30.8 30.8
BAL e S 62.00 0.10 0.77 62.65 -0.65 133.9 315 2.3 2.3
MUN e P 49.90 0.20 0.74 49.55 0.35 151.0 247 -30.8 30.8
MUN e S 67.10 0.20 0.67 67.36 -0.26 151.0 247 2.0 2.0
NWAO e S 72.00 0.50 0.55 71.49 0.51 166.9 194 -23.9 23.9
MRWA e S 100.00 0.10 0.72 99.18 0.82 298.0 326 -40.3 40.3
MRWA e SMS 105.10 0.10 0.40 105.27 -0.17 298.0 326 -25.4 25.4
9 times used, S = 0.382
Velocity Ratios
KLB BAL MUN
KLB 1.76 1.68 1.70
0.12 0.03 0.04
BAL 1.68 1.69 0.00
0.03 0.01 0.00
MUN 1.70 0.00 1.71
0.04 0.00 0.02
Date 1997-04-06
Origin Time 2145 32.69 +- 0.62
Zone 50
Easting 564.56 +- 5.45 Longitude 117.680
Northing 6517.65 +- 4.80 Latitude -31.474
Depth 5.00 +- 9.40 N
Arrival times = 9 S.D. = 0.338 Seismographs = 5
Nearest recorder = 15.1 km Gap = 183.0 deg Accuracy = C
Effects Code = Imax = 0 Fault =
3 km E ( 78 deg) of KBS
WESTERN AUSTRALIA
181 km E ( 74 deg) of PERTH
18 km N (347 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.5
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB e P 35.10 0.10 1.02 35.31 -0.21 15.1 149 19.3 19.3
KLB i S 37.10 0.10 1.31 37.12 -0.02 15.1 149 19.3 19.3
BAL e P 54.30 0.10 0.86 54.20 0.10 133.6 315 -30.8 30.8
BAL e S 69.20 0.10 0.77 69.64 -0.44 133.6 315 2.3 2.3
MUN e P 56.70 0.20 0.74 56.51 0.19 150.2 247 -30.8 30.8
MUN e S 74.00 0.10 0.77 74.20 -0.20 150.2 247 2.0 2.0
NWAO e S 79.00 0.50 0.55 78.44 0.56 166.4 194 -23.9 23.9
MRWA e S 107.00 0.20 0.63 106.23 0.77 297.8 326 -40.3 40.3
MRWA e SMS 112.00 0.20 0.35 112.31 -0.31 297.8 326 -25.4 25.4
9 times used, S = 0.338
Velocity Ratios
KLB BAL MUN
KLB 1.83 1.67 1.71
0.12 0.03 0.03
BAL 1.67 1.69 0.00
0.03 0.01 0.00
MUN 1.71 0.00 1.72
0.03 0.00 0.02
Date 1997-04-07
Origin Time 0224 42.52 +- 1.06
Zone 50
Easting 564.55 +- 5.67 Longitude 117.680
Northing 6516.76 +- 7.98 Latitude -31.482
Depth 5.00 +- 15.84 N
Arrival times = 9 S.D. = 0.293 Seismographs = 5
Nearest recorder = 14.4 km Gap = 181.1 deg Accuracy = C
Effects Code = Imax = 0 Fault =
2 km E ( 95 deg) of KBS
WESTERN AUSTRALIA
181 km E ( 74 deg) of PERTH
17 km N (347 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.6
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i P 44.90 0.10 1.46 45.02 -0.12 14.4 147 20.3 20.3
KLB i S 46.80 0.10 1.32 46.75 0.05 14.4 147 20.3 20.3
BAL w S 79.00 2.00 0.43 79.64 -0.64 134.3 316 2.3 2.3
MUN e P 66.20 0.20 0.74 66.29 -0.09 149.8 247 -30.8 30.8
MUN i S 83.90 0.10 1.10 83.94 -0.04 149.8 247 2.0 2.0
NWAO e S 88.50 0.50 0.55 88.05 0.45 165.6 194 -23.9 23.9
MRWA e PMP 88.00 1.00 0.30 87.47 0.53 298.5 326 -31.8 31.8
MRWA e S 117.00 0.50 0.52 116.21 0.79 298.5 326 -40.3 40.3
MRWA e SMS 122.00 0.50 0.29 122.32 -0.32 298.5 326 -25.4 25.4
9 times used, S = 0.293
Velocity Ratios
KLB MUN
KLB 1.80 1.74
0.12 0.03
MUN 1.74 1.75
0.03 0.02
Date 1997-04-07
Origin Time 0552 42.95 +- 0.77
Zone 50
Easting 563.56 +- 5.78 Longitude 117.669
Northing 6515.50 +- 6.33 Latitude -31.493
Depth 5.00 +- 12.55 N
Arrival times = 11 S.D. = 0.167 Seismographs = 5
Nearest recorder = 13.9 km Gap = 174.6 deg Accuracy = B
Effects Code = Imax = 0 Fault =
2 km SE (127 deg) of KBS
WESTERN AUSTRALIA
180 km E ( 74 deg) of PERTH
16 km N (342 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.0
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i-P 45.30 0.10 1.47 45.38 -0.08 13.9 141 20.9 20.9
KLB i S 47.10 0.10 1.32 47.06 0.04 13.9 141 20.9 20.9
BAL i-P 64.50 0.10 1.23 64.58 -0.08 134.5 316 -30.8 30.8
BAL i S 80.00 0.10 1.11 80.14 -0.14 134.5 316 2.3 2.3
MUN e P 66.80 0.10 0.85 66.52 0.28 148.5 248 -30.8 30.8
MUN i S 84.00 0.10 1.10 83.99 0.01 148.5 248 2.0 2.0
NWAO w P 68.70 2.00 0.74 68.72 -0.02 164.1 194 -30.8 30.8
NWAO e PMP 69.40 0.30 0.41 69.46 -0.06 164.1 194 -34.7 34.7
NWAO e S 88.70 0.50 0.47 88.11 0.59 164.1 194 -23.9 23.9
MRWA e S 117.00 0.50 0.52 116.75 0.25 299.1 327 -40.3 40.3
MRWA e SMS 122.50 0.50 0.29 122.88 -0.38 299.1 327 -25.4 25.4
11 times used, S = 0.167
Velocity Ratios
KLB BAL MUN NWAO
KLB 1.77 1.71 1.72 0.00
0.12 0.03 0.03 0.00
BAL 1.71 1.72 0.00 0.00
0.03 0.01 0.00 0.00
MUN 1.72 0.00 1.72 0.00
0.03 0.00 0.01 0.00
NWAO 0.00 0.00 0.00 1.78
0.00 0.00 0.00 0.17
Date 1997-04-09
Origin Time 0321 41.97 +- 0.26
Zone 50
Easting 564.16 +- 2.38 Longitude 117.675
Northing 6518.15 +- 2.19 Latitude -31.470
Depth 2.56 +- 5.35
Arrival times = 11 S.D. = 0.074 Seismographs = 5
Nearest recorder = 15.7 km Gap = 182.7 deg Accuracy = A
Effects Code = Imax = 0 Fault =
2 km NE ( 66 deg) of KBS
WESTERN AUSTRALIA
181 km E ( 73 deg) of PERTH
18 km N (347 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
KLB 0.00 Seismograph details unknown
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.2
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i-P 44.60 0.10 1.45 44.58 0.02 15.7 149 10.3 10.3
KLB i S 46.40 0.10 1.31 46.39 0.01 15.7 149 10.3 10.3
BAL i-P 63.60 0.10 1.23 63.59 0.01 133.0 315 -30.8 30.8
BAL e S 78.60 0.20 0.67 78.72 -0.12 133.0 315 1.2 1.2
MUN i-P 65.90 0.10 1.22 65.97 -0.07 150.0 247 -30.8 30.8
MUN e S 83.60 0.20 0.67 83.42 0.18 150.0 247 1.1 1.1
MUN e SMS 85.70 0.30 0.34 85.64 0.06 150.0 247 -31.4 31.4
NWAO i P 68.30 0.10 1.21 68.32 -0.02 166.8 194 -30.8 30.8
NWAO e S 88.00 0.20 0.66 88.06 -0.06 166.8 194 1.0 1.0
MRWA e PMP 87.00 0.50 0.35 86.94 0.06 297.2 326 -31.8 31.8
MRWA e S 116.00 0.50 0.52 115.81 0.19 297.2 326 -40.3 40.3
11 times used, S = 0.074
Deferred Data
NWAO e SMS 92.90 0.50 0.31 89.64 3.26 166.8 194 -29.9 29.9
MRWA e SMS 122.50 0.50 0.29 121.72 0.78 297.2 326 -25.4 25.4
MRWA e SG 129.00 0.50 0.52 124.07 4.93 297.2 326 0.6 0.6
Velocity Ratios
KLB BAL MUN NWAO
KLB 1.69 1.69 1.75 1.76
0.11 0.03 0.03 0.03
BAL 1.69 1.69 0.00 2.00
0.03 0.02 0.00 0.18
MUN 1.75 0.00 1.74 0.00
0.03 0.00 0.02 0.00
NWAO 1.76 2.00 0.00 1.75
0.03 0.18 0.00 0.01
Date 1997-04-13
Origin Time 0808 6.54 +- 0.42
Zone 50
Easting 564.83 +- 3.58 Longitude 117.683
Northing 6517.55 +- 3.28 Latitude -31.475
Depth 5.00 +- 6.50 N
Arrival times = 10 S.D. = 0.260 Seismographs = 5
Nearest recorder = 14.9 km Gap = 183.8 deg Accuracy = B
Effects Code = Imax = 0 Fault =
3 km E ( 80 deg) of KBS
WESTERN AUSTRALIA
182 km E ( 74 deg) of PERTH
18 km N (348 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.1
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i P 9.00 0.10 1.46 9.12 -0.12 14.9 150 19.6 19.6
KLB i S 10.90 0.10 1.31 10.91 -0.01 14.9 150 19.6 19.6
BAL i P 28.10 0.10 1.23 28.08 0.02 133.9 315 -30.8 30.8
BAL i S 43.30 0.10 1.11 43.56 -0.26 133.9 315 2.3 2.3
MUN i+P 30.30 0.10 1.22 30.39 -0.09 150.4 247 -30.8 30.8
MUN i S 48.10 0.10 1.09 48.11 -0.01 150.4 247 2.0 2.0
NWAO e P 33.10 0.20 0.73 32.63 0.47 166.4 194 -30.8 30.8
NWAO e S 52.50 0.30 0.61 52.29 0.21 166.4 194 -23.9 23.9
MRWA e S 81.00 0.20 0.63 80.12 0.88 298.0 326 -40.3 40.3
MRWA e SMS 86.50 0.20 0.35 86.21 0.29 298.0 326 -25.4 25.4
10 times used, S = 0.260
Velocity Ratios
KLB BAL MUN NWAO
KLB 1.77 1.70 1.75 1.73
0.12 0.03 0.03 0.04
BAL 1.70 1.71 0.00 0.00
0.03 0.01 0.00 0.00
MUN 1.75 0.00 1.75 0.00
0.03 0.00 0.01 0.00
NWAO 1.73 0.00 0.00 1.73
0.04 0.00 0.00 0.02
Date 1997-04-16
Origin Time 1724 30.79 +- 0.88
Zone 50
Easting 511.90 +- 5.91 Longitude 117.124
Northing 6597.37 +- 5.78 Latitude -30.756
Depth 5.00 +- 5.86 N
Arrival times = 9 S.D. = 0.321 Seismographs = 5
Nearest recorder = 4.7 km Gap = 179.8 deg Accuracy = C
Effects Code = Imax = 0 Fault =
1 km NW (321 deg) of CADX
WESTERN AUSTRALIA
179 km NE ( 43 deg) of PERTH
2 km N (340 deg) of Cadoux
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.7
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
CMC i P 31.60 0.10 1.57 31.95 -0.35 4.7 214 48.7 48.7
CMC i S 32.70 0.10 1.41 32.75 -0.05 4.7 214 48.7 48.7
BAL i P 37.70 0.10 1.35 37.91 -0.21 43.3 292 7.0 7.0
BAL i S 42.80 0.10 1.21 42.84 -0.04 43.3 292 7.0 7.0
KLB i P 49.10 0.10 1.25 48.86 0.24 110.6 147 2.7 2.7
KLB i S 61.10 0.10 1.12 61.38 -0.28 110.6 147 2.7 2.7
MUN i P 56.60 0.10 1.21 56.12 0.48 161.0 212 -30.8 30.8
MUN i S 75.40 0.10 1.09 75.18 0.22 161.0 212 -23.9 23.9
MRWA e P 62.00 0.10 0.83 61.37 0.63 202.3 327 -42.2 42.2
9 times used, S = 0.321
Deferred Data
MRWA e S 85.00 0.10 0.75 84.21 0.79 202.3 327 -40.3 40.3
Velocity Ratios
CMC BAL KLB MUN
CMC 2.36 1.66 1.62 1.71
0.47 0.09 0.03 0.02
BAL 1.66 1.74 1.61 1.72
0.09 0.04 0.05 0.03
KLB 1.62 1.61 1.66 1.91
0.03 0.05 0.01 0.08
MUN 1.71 1.72 1.91 1.73
0.02 0.03 0.08 0.01
Date 1997-04-19
Origin Time 1043 28.11 +- 26.71
Zone 51
Easting 389.13 +- 330.09 Longitude 121.828
Northing 6475.51 +- 123.31 Latitude -31.851
Depth 5.00 +- 338.11 N
Arrival times = 9 S.D. = 5.066 Seismographs = 7
Nearest recorder = 87.4 km Gap = 229.2 deg Accuracy = D
Effects Code = Imax = 0 Fault =
53 km S (186 deg) of KMBL
WESTERN AUSTRALIA
566 km E ( 90 deg) of PERTH
39 km N ( 7 deg) of NORSEMAN
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign -10.0
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
WOOL S-P 14.00 0.10 1.27 9.90 4.10 87.4 350 0.0 0.0
WOOL i P 40.10 0.10 1.27 42.39 -2.29 87.4 350 3.5 3.5
WOOL i S 54.10 0.10 1.15 52.29 1.81 87.4 350 3.5 3.5
KLB S-P 43.00 0.10 1.11 39.39 3.61 387.0 273 0.0 0.0
BAL e S 150.00 0.10 0.68 145.84 4.16 507.7 284 -40.3 40.3
MUN S-P 45.00 0.10 1.08 52.43 -7.43 532.5 266 0.0 0.0
MRWA S-P 55.10 0.10 1.06 61.37 -6.27 632.2 296 0.0 0.0
MEEK i P 113.10 0.10 1.06 113.72 -0.62 657.2 330 -42.2 42.2
WARB S-P 67.10 0.10 1.04 74.95 -7.85 783.7 37 0.0 0.0
9 times used, S = 5.066
Deferred Data
KLB e P 101.50 0.10 0.77 81.03 20.47 387.0 273 -42.2 42.2
KLB e S 144.50 0.10 0.70 120.42 24.08 387.0 273 -40.3 40.3
MUN e P 118.00 0.10 0.75 98.62 19.38 532.5 266 -42.2 42.2
MUN e S 163.00 0.10 0.68 151.05 11.95 532.5 266 -40.3 40.3
MRWA e P 106.30 0.10 0.74 110.68 -4.38 632.2 296 -42.2 42.2
MRWA e S 171.30 0.10 0.67 172.06 -0.76 632.2 296 -40.3 40.3
MEEK e S 166.10 0.10 0.66 177.34 -11.24 657.2 330 -40.3 40.3
WARB e P 136.20 0.10 0.73 129.02 7.18 783.7 37 -42.2 42.2
WARB e S 203.30 0.10 0.66 203.97 -0.67 783.7 37 -40.3 40.3
Velocity Ratios
WOOL
WOOL 2.17
0.03
Date 1997-04-21
Origin Time 1337 44.24 +- 51.94
Zone 50
Easting 181.41 +- 415.19 Longitude 113.898
Northing 7483.18 +- 856.47 Latitude -22.729
Depth 5.00 +- 740.54 N
Arrival times = 5 S.D. = 0.418 Seismographs = 3
Nearest recorder = 35.8 km Gap = 270.4 deg Accuracy = B
Effects Code = Imax = 0 Fault =
35 km W (254 deg) of GIRL
WESTERN AUSTRALIA
93 km S (195 deg) of Exmouth
56 km S (199 deg) of Learmonth
Record Dur Sync Unc Resp Seismometer Recorder Pol
GIRL 0.00 Seismograph details unknown
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 3.1
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
GIRL i-P 50.20 0.10 1.37 50.14 0.06 35.8 74 8.1 8.1
MEEK e P 127.60 0.10 0.74 128.29 -0.69 644.2 133 -42.2 42.2
MEEK e S 190.90 0.50 0.48 190.75 0.15 644.2 133 -40.3 40.3
MRWA e P 141.50 0.50 0.53 140.94 0.56 749.1 164 -42.2 42.2
MRWA e S 213.00 0.30 0.53 212.78 0.22 749.1 164 -40.3 40.3
5 times used, S = 0.418
Velocity Ratios
MEEK MRWA
MEEK 1.76 1.59
0.01 0.13
MRWA 1.59 1.74
0.13 0.01
Date 1997-04-24
Origin Time 2012 18.25 +- 0.25
Zone 50
Easting 563.98 +- 1.62 Longitude 117.673
Northing 6519.06 +- 1.24 Latitude -31.461
Depth 1.43 +- 4.38
Arrival times = 17 S.D. = 0.253 Seismographs = 9
Nearest recorder = 16.6 km Gap = 68.6 deg Accuracy = A
Effects Code = Imax = 0 Fault =
3 km NE ( 49 deg) of KBS
WESTERN AUSTRALIA
181 km E ( 73 deg) of PERTH
19 km N (347 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
KLB 0.00 Seismograph details unknown
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 3.2
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i-P 20.90 0.10 1.45 20.98 -0.08 16.6 150 5.9 5.9
KLB i S 22.80 0.10 1.30 22.87 -0.07 16.6 150 5.9 5.9
BAL i+P 39.80 0.10 1.23 39.82 -0.02 132.2 315 0.7 0.7
BAL i S 54.70 0.10 1.11 54.78 -0.08 132.2 315 0.7 0.7
MUN i+P 42.20 0.10 1.22 42.37 -0.17 150.2 247 -30.8 30.8
MUN i S 60.20 0.10 1.09 59.74 0.46 150.2 247 0.6 0.6
NWAO i+P 44.70 0.10 1.20 44.81 -0.11 167.6 194 -30.8 30.8
NWAO e S 64.50 0.20 0.66 64.56 -0.06 167.6 194 0.6 0.6
MRWA i+P 60.20 0.10 1.14 60.59 -0.39 296.3 326 -42.2 42.2
MRWA e SMS 97.60 0.20 0.35 97.92 -0.32 296.3 326 -25.5 25.5
RKG e PMP 71.00 0.50 0.34 70.67 0.33 350.1 189 -31.5 31.5
RKG e SMS 111.50 0.30 0.32 111.37 0.13 350.1 189 -25.0 25.0
WOOL e P 71.30 0.10 0.78 71.20 0.10 384.0 84 -42.2 42.2
WOOL SMS 120.10 0.10 0.56 119.86 0.24 384.0 84 -24.8 24.8
MEEK i P 90.60 0.10 1.08 90.36 0.24 542.3 9 -42.2 42.2
WARB i P 152.90 0.10 1.01 152.49 0.41 1056.1 58 -42.2 42.2
WARB e S 251.90 0.10 0.63 252.10 -0.20 1056.1 58 -40.3 40.3
17 times used, S = 0.253
Deferred Data
MRWA e PMP 63.80 0.20 0.42 63.20 0.60 296.3 326 -31.9 31.9
MRWA e S 92.70 0.20 0.63 92.11 0.59 296.3 326 -40.3 40.3
RKG e S 105.00 0.50 0.51 103.44 1.56 350.1 189 -40.3 40.3
MEEK i S 142.70 0.10 0.97 143.93 -1.23 542.3 9 -40.3 40.3
FORT e P 144.60 0.10 0.71 145.35 -0.75 997.4 88 -42.2 42.2
FORT e S 240.40 0.10 0.64 239.67 0.73 997.4 88 -40.3 40.3
Velocity Ratios
KLB BAL MUN NWAO WARB
KLB 1.72 1.69 1.76 1.75 1.74
0.11 0.03 0.03 0.03 0.00
BAL 1.69 1.69 0.00 2.00 1.74
0.03 0.01 0.00 0.15 0.00
MUN 1.76 0.00 1.75 0.00 1.73
0.03 0.00 0.01 0.00 0.00
NWAO 1.75 2.00 0.00 1.75 1.73
0.03 0.15 0.00 0.01 0.01
WARB 1.74 1.74 1.73 1.73 1.74
0.00 0.00 0.00 0.01 0.00
Date 1997-04-24
Origin Time 2017 27.29 +- 0.69
Zone 50
Easting 566.79 +- 6.76 Longitude 117.703
Northing 6518.71 +- 5.25 Latitude -31.464
Depth 5.00 +- 9.33 N
Arrival times = 9 S.D. = 0.382 Seismographs = 5
Nearest recorder = 15.1 km Gap = 192.9 deg Accuracy = B
Effects Code = Imax = 0 Fault =
5 km E ( 72 deg) of KBS
WESTERN AUSTRALIA
184 km E ( 73 deg) of PERTH
18 km N (355 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.9
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i P 30.00 0.10 1.46 29.90 0.10 15.1 159 19.3 19.3
KLB e S 31.10 0.10 0.92 31.72 -0.62 15.1 159 19.3 19.3
BAL i-P 49.10 0.10 1.23 48.91 0.19 134.4 314 -30.8 30.8
BAL e S 63.80 0.20 0.67 64.46 -0.66 134.4 314 2.3 2.3
MUN e P 51.40 0.20 0.74 51.45 -0.05 152.6 247 -30.8 30.8
MUN e S 69.30 0.20 0.67 69.48 -0.18 152.6 247 2.0 2.0
NWAO e P 54.10 0.10 0.84 53.61 0.49 168.0 195 -30.8 30.8
NWAO e S 73.70 0.20 0.66 73.45 0.25 168.0 195 -23.9 23.9
MRWA e SMS 106.80 0.30 0.32 106.99 -0.19 298.1 326 -25.4 25.4
9 times used, S = 0.382
Velocity Ratios
KLB BAL MUN NWAO
KLB 1.41 1.71 1.79 1.77
0.09 0.03 0.04 0.03
BAL 1.71 1.67 0.00 1.98
0.03 0.02 0.00 0.17
MUN 1.79 0.00 1.74 0.00
0.04 0.00 0.02 0.00
NWAO 1.77 1.98 0.00 1.73
0.03 0.17 0.00 0.01
Date 1997-04-24
Origin Time 2306 40.56 +- 0.31
Zone 50
Easting 564.94 +- 2.93 Longitude 117.684
Northing 6518.71 +- 2.52 Latitude -31.464
Depth 5.00 +- 4.47 N
Arrival times = 11 S.D. = 0.204 Seismographs = 5
Nearest recorder = 15.9 km Gap = 186.3 deg Accuracy = B
Effects Code = Imax = 0 Fault =
3 km NE ( 63 deg) of KBS
WESTERN AUSTRALIA
182 km E ( 73 deg) of PERTH
19 km N (349 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.9
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i-P 43.30 0.10 1.45 43.29 0.01 15.9 152 18.5 18.5
KLB i S 45.10 0.10 1.31 45.18 -0.08 15.9 152 18.5 18.5
BAL i P 62.10 0.10 1.23 61.99 0.11 133.1 315 -30.8 30.8
BAL i S 77.10 0.10 1.11 77.37 -0.27 133.1 315 2.3 2.3
MUN i+P 64.40 0.10 1.22 64.48 -0.08 150.9 247 -30.8 30.8
MUN e S 82.40 0.10 0.77 82.28 0.12 150.9 247 2.0 2.0
NWAO e P 67.00 0.10 0.84 66.81 0.19 167.5 194 -30.8 30.8
NWAO e S 86.60 0.20 0.66 86.60 0.00 167.5 194 -23.9 23.9
MRWA e P 82.50 0.30 0.64 82.61 -0.11 297.1 326 -42.2 42.2
MRWA e S 114.70 0.30 0.58 113.95 0.75 297.1 326 -40.3 40.3
MRWA e SMS 120.00 0.20 0.35 120.01 -0.01 297.1 326 -25.4 25.4
11 times used, S = 0.204
Velocity Ratios
KLB BAL MUN NWAO MRWA
KLB 1.66 1.70 1.77 1.75 1.78
0.10 0.03 0.03 0.03 0.03
BAL 1.70 1.70 0.00 1.94 1.84
0.03 0.01 0.00 0.15 0.06
MUN 1.77 0.00 1.76 0.00 1.78
0.03 0.00 0.01 0.00 0.06
NWAO 1.75 1.94 0.00 1.74 1.81
0.03 0.15 0.00 0.01 0.08
MRWA 1.78 1.84 1.78 1.81 1.77
0.03 0.06 0.06 0.08 0.02
Date 1997-04-25
Origin Time 0039 42.52 +- 0.29
Zone 50
Easting 564.60 +- 3.14 Longitude 117.680
Northing 6519.22 +- 2.36 Latitude -31.460
Depth 5.00 +- 4.08 N
Arrival times = 11 S.D. = 0.194 Seismographs = 5
Nearest recorder = 16.5 km Gap = 186.0 deg Accuracy = B
Effects Code = Imax = 0 Fault =
3 km NE ( 54 deg) of KBS
WESTERN AUSTRALIA
182 km E ( 73 deg) of PERTH
19 km N (349 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.8
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i-P 45.40 0.10 1.45 45.34 0.06 16.5 152 17.8 17.8
KLB i S 47.20 0.10 1.31 47.30 -0.10 16.5 152 17.8 17.8
BAL i+P 63.90 0.10 1.23 63.87 0.03 132.5 315 -30.8 30.8
BAL i S 78.90 0.10 1.11 79.16 -0.26 132.5 315 2.3 2.3
MUN i+P 66.40 0.10 1.22 66.42 -0.02 150.8 247 -30.8 30.8
MUN e S 84.40 0.20 0.67 84.20 0.20 150.8 247 2.0 2.0
NWAO e P 69.00 0.10 0.84 68.83 0.17 167.9 194 -30.8 30.8
NWAO e S 88.50 0.20 0.66 88.66 -0.16 167.9 194 -23.9 23.9
MRWA e P 84.40 0.20 0.70 84.49 -0.09 296.5 326 -42.2 42.2
MRWA e S 116.40 0.20 0.63 115.78 0.62 296.5 326 -40.3 40.3
MRWA e SMS 122.00 0.20 0.35 121.81 0.19 296.5 326 -25.4 25.4
11 times used, S = 0.194
Velocity Ratios
KLB BAL MUN NWAO MRWA
KLB 1.63 1.71 1.77 1.75 1.77
0.09 0.03 0.03 0.03 0.02
BAL 1.71 1.70 0.00 1.88 1.83
0.03 0.01 0.00 0.14 0.04
MUN 1.77 0.00 1.75 0.00 1.78
0.03 0.00 0.02 0.00 0.05
NWAO 1.75 1.88 0.00 1.74 1.81
0.03 0.14 0.00 0.01 0.06
MRWA 1.77 1.83 1.78 1.81 1.76
0.02 0.04 0.05 0.06 0.01
Date 1997-04-25
Origin Time 0137 49.50 +- 0.46
Zone 50
Easting 563.96 +- 4.15 Longitude 117.673
Northing 6517.48 +- 4.10 Latitude -31.476
Depth 5.00 +- 7.11 N
Arrival times = 11 S.D. = 0.320 Seismographs = 5
Nearest recorder = 15.3 km Gap = 180.7 deg Accuracy = B
Effects Code = Imax = 0 Fault =
2 km E ( 79 deg) of KBS
WESTERN AUSTRALIA
181 km E ( 74 deg) of PERTH
18 km N (345 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.1
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i-P 52.10 0.10 1.46 52.14 -0.04 15.3 147 19.1 19.1
KLB i S 53.90 0.10 1.31 53.97 -0.07 15.3 147 19.1 19.1
BAL e P 70.80 0.10 0.86 70.96 -0.16 133.3 316 -30.8 30.8
BAL e S 85.80 0.20 0.67 86.37 -0.57 133.3 316 2.3 2.3
MUN e P 73.30 0.10 0.85 73.23 0.07 149.6 247 -30.8 30.8
MUN e S 90.70 0.20 0.67 90.84 -0.14 149.6 247 2.0 2.0
NWAO e P 75.90 0.10 0.84 75.55 0.35 166.1 194 -30.8 30.8
NWAO e S 95.20 0.30 0.61 95.17 0.03 166.1 194 -23.9 23.9
MRWA e PMP 94.50 0.30 0.39 94.32 0.18 297.6 326 -31.8 31.8
MRWA e S 124.00 0.30 0.58 122.99 1.01 297.6 326 -40.3 40.3
MRWA e SMS 128.90 0.20 0.35 129.07 -0.17 297.6 326 -25.4 25.4
11 times used, S = 0.320
Velocity Ratios
KLB BAL MUN NWAO
KLB 1.69 1.71 1.74 1.74
0.11 0.03 0.03 0.03
BAL 1.71 1.70 0.00 1.84
0.03 0.02 0.00 0.18
MUN 1.74 0.00 1.73 0.00
0.03 0.00 0.02 0.00
NWAO 1.74 1.84 0.00 1.73
0.03 0.18 0.00 0.02
Date 1997-04-25
Origin Time 0138 30.27 +- 0.45
Zone 50
Easting 564.00 +- 4.59 Longitude 117.674
Northing 6518.08 +- 3.84 Latitude -31.470
Depth 5.00 +- 6.48 N
Arrival times = 11 S.D. = 0.323 Seismographs = 5
Nearest recorder = 15.8 km Gap = 182.0 deg Accuracy = B
Effects Code = Imax = 0 Fault =
2 km NE ( 66 deg) of KBS
WESTERN AUSTRALIA
181 km E ( 73 deg) of PERTH
18 km N (346 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.5
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i-P 32.90 0.10 1.45 32.98 -0.08 15.8 148 18.6 18.6
KLB i S 34.80 0.10 1.31 34.86 -0.06 15.8 148 18.6 18.6
BAL i P 51.80 0.10 1.23 51.67 0.13 132.9 315 -30.8 30.8
BAL i S 66.50 0.20 0.96 67.02 -0.52 132.9 315 2.3 2.3
MUN e P 54.20 0.20 0.74 54.03 0.17 149.8 247 -30.8 30.8
MUN e S 71.70 0.30 0.62 71.68 0.02 149.8 247 2.0 2.0
NWAO e P 56.70 0.20 0.73 56.40 0.30 166.7 194 -30.8 30.8
NWAO e S 75.90 0.30 0.61 76.09 -0.19 166.7 194 -23.9 23.9
MRWA e PMP 76.00 0.50 0.35 75.02 0.98 297.1 326 -31.8 31.8
MRWA e S 104.40 0.30 0.58 103.66 0.74 297.1 326 -40.3 40.3
MRWA e SMS 109.40 0.20 0.35 109.71 -0.31 297.1 326 -25.4 25.4
11 times used, S = 0.323
Deferred Data
MRWA e P 76.00 0.50 0.58 72.32 3.68 297.1 326 -42.2 42.2
Velocity Ratios
KLB BAL MUN NWAO
KLB 1.72 1.68 1.73 1.73
0.11 0.03 0.04 0.04
BAL 1.68 1.68 0.00 0.00
0.03 0.02 0.00 0.00
MUN 1.73 0.00 1.73 0.00
0.04 0.00 0.03 0.00
NWAO 1.73 0.00 0.00 1.73
0.04 0.00 0.00 0.02
Date 1997-04-25
Origin Time 0159 23.61 +- 0.36
Zone 50
Easting 564.57 +- 3.34 Longitude 117.680
Northing 6517.99 +- 3.21 Latitude -31.471
Depth 5.00 +- 5.63 N
Arrival times = 11 S.D. = 0.237 Seismographs = 5
Nearest recorder = 15.4 km Gap = 183.7 deg Accuracy = B
Effects Code = Imax = 0 Fault =
3 km E ( 72 deg) of KBS
WESTERN AUSTRALIA
181 km E ( 73 deg) of PERTH
18 km N (348 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.1
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i-P 26.20 0.10 1.46 26.27 -0.07 15.4 150 19.0 19.0
KLB i S 28.10 0.10 1.31 28.11 -0.01 15.4 150 19.0 19.0
BAL e P 45.10 0.10 0.86 45.08 0.02 133.4 315 -30.8 30.8
BAL e S 60.10 0.10 0.77 60.49 -0.39 133.4 315 2.3 2.3
MUN e P 47.40 0.20 0.74 47.44 -0.04 150.3 247 -30.8 30.8
MUN e S 65.20 0.20 0.67 65.16 0.04 150.3 247 2.0 2.0
NWAO e P 50.00 0.20 0.73 49.75 0.25 166.8 194 -30.8 30.8
NWAO e S 69.40 0.30 0.61 69.44 -0.04 166.8 194 -23.9 23.9
MRWA e PMP 69.00 0.30 0.39 68.41 0.59 297.5 326 -31.8 31.8
MRWA e S 97.70 0.30 0.58 97.08 0.62 297.5 326 -40.3 40.3
MRWA e SMS 102.80 0.20 0.35 103.15 -0.35 297.5 326 -25.4 25.4
11 times used, S = 0.237
Velocity Ratios
KLB BAL MUN NWAO
KLB 1.73 1.69 1.75 1.74
0.11 0.03 0.04 0.04
BAL 1.69 1.70 0.00 0.00
0.03 0.01 0.00 0.00
MUN 1.75 0.00 1.75 0.00
0.04 0.00 0.02 0.00
NWAO 1.74 0.00 0.00 1.74
0.04 0.00 0.00 0.02
Date 1997-04-25
Origin Time 0324 14.39 +- 0.41
Zone 50
Easting 564.88 +- 4.16 Longitude 117.683
Northing 6518.34 +- 3.75 Latitude -31.468
Depth 5.00 +- 7.18 N
Arrival times = 10 S.D. = 0.253 Seismographs = 5
Nearest recorder = 15.6 km Gap = 185.4 deg Accuracy = B
Effects Code = Imax = 0 Fault =
3 km E ( 68 deg) of KBS
WESTERN AUSTRALIA
182 km E ( 73 deg) of PERTH
18 km N (349 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.1
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i-P 17.00 0.10 1.46 17.07 -0.07 15.6 152 18.8 18.8
KLB i S 18.90 0.10 1.31 18.93 -0.03 15.6 152 18.8 18.8
BAL i+P 36.00 0.10 1.23 35.85 0.15 133.4 315 -30.8 30.8
BAL e S 50.70 0.20 0.67 51.26 -0.56 133.4 315 2.3 2.3
MUN e P 38.20 0.10 0.85 38.28 -0.08 150.7 247 -30.8 30.8
MUN e S 56.10 0.20 0.67 56.06 0.04 150.7 247 2.0 2.0
NWAO e P 41.00 0.20 0.73 40.59 0.41 167.2 194 -30.8 30.8
NWAO e S 60.20 0.30 0.61 60.33 -0.13 167.2 194 -23.9 23.9
MRWA e PMP 60.00 0.30 0.39 59.18 0.82 297.4 326 -31.8 31.8
MRWA e SMS 93.80 0.20 0.35 93.90 -0.10 297.4 326 -25.4 25.4
10 times used, S = 0.253
Velocity Ratios
KLB BAL MUN NWAO
KLB 1.73 1.67 1.75 1.72
0.11 0.03 0.03 0.04
BAL 1.67 1.68 0.00 0.00
0.03 0.02 0.00 0.00
MUN 1.75 0.00 1.75 0.00
0.03 0.00 0.02 0.00
NWAO 1.72 0.00 0.00 1.72
0.04 0.00 0.00 0.02
Date 1997-04-25
Origin Time 0421 51.63 +- 0.52
Zone 50
Easting 563.94 +- 3.78 Longitude 117.673
Northing 6517.83 +- 3.46 Latitude -31.472
Depth 5.00 +- 6.72 N
Arrival times = 10 S.D. = 0.263 Seismographs = 5
Nearest recorder = 15.6 km Gap = 181.3 deg Accuracy = B
Effects Code = Imax = 0 Fault =
2 km E ( 71 deg) of KBS
WESTERN AUSTRALIA
181 km E ( 73 deg) of PERTH
18 km N (346 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.2
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB e P 54.20 0.20 0.89 54.32 -0.12 15.6 148 18.8 18.8
KLB e S 56.10 0.20 0.80 56.18 -0.08 15.6 148 18.8 18.8
BAL e P 73.20 0.20 0.75 73.06 0.14 133.1 316 -30.8 30.8
BAL e S 88.00 0.20 0.67 88.43 -0.43 133.1 316 2.3 2.3
MUN i-P 75.30 0.10 1.22 75.38 -0.08 149.7 247 -30.8 30.8
MUN e S 93.00 0.20 0.67 93.00 -0.00 149.7 247 2.0 2.0
NWAO e P 77.90 0.20 0.73 77.73 0.17 166.4 194 -30.8 30.8
NWAO e S 97.60 0.30 0.61 97.39 0.21 166.4 194 -23.9 23.9
MRWA e S 125.70 0.20 0.63 125.06 0.64 297.3 326 -40.3 40.3
MRWA e SMS 130.70 0.20 0.35 131.13 -0.43 297.3 326 -25.4 25.4
10 times used, S = 0.263
Velocity Ratios
KLB BAL MUN NWAO
KLB 1.74 1.68 1.75 1.75
0.23 0.06 0.04 0.05
BAL 1.68 1.69 0.00 0.00
0.06 0.03 0.00 0.00
MUN 1.75 0.00 1.75 0.00
0.04 0.00 0.02 0.00
NWAO 1.75 0.00 0.00 1.75
0.05 0.00 0.00 0.02
Date 1997-04-25
Origin Time 1328 10.88 +- 9.16
Zone 50
Easting 343.92 +- 32.52 Longitude 115.449
Northing 7196.93 +- 18.90 Latitude -25.336
Depth 5.00 +- 39.80 N
Arrival times = 8 S.D. = 0.672 Seismographs = 6
Nearest recorder = 348.1 km Gap = 231.9 deg Accuracy = C
Effects Code = Imax = 0 Fault =
77 km SE (122 deg) of LP02
WESTERN AUSTRALIA
734 km N (357 deg) of PERTH
186 km E (106 deg) of CARNARVON
40 km SE (142 deg) of Gascoyne Junction
Record Dur Sync Unc Resp Seismometer Recorder Pol
MEEK 0.00 Seismograph details unknown
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.7
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
MEEK e P 58.60 0.20 0.69 59.12 -0.52 348.1 115 -42.2 42.2
MEEK e PMP 63.50 0.20 0.41 62.73 0.77 348.1 115 -31.5 31.5
MEEK e SG 107.50 0.30 0.57 107.05 0.45 348.1 115 0.9 0.9
MRWA e P 70.40 0.30 0.62 69.42 0.98 433.5 172 -42.2 42.2
BAL e SG 175.00 0.50 0.49 175.77 -0.77 596.9 168 0.5 0.5
MBL e S 157.00 0.10 0.67 157.31 -0.31 644.1 44 -40.3 40.3
KLB e S 175.00 1.00 0.42 175.20 -0.20 729.0 162 -40.3 40.3
NWAO e S 202.00 1.00 0.41 202.50 -0.50 858.7 168 -40.3 40.3
8 times used, S = 0.672
Deferred Data
MEEK e S 96.60 0.30 0.57 95.04 1.56 348.1 115 -40.3 40.3
MRWA e S 111.70 0.30 0.56 112.98 -1.28 433.5 172 -40.3 40.3
BAL e S 149.00 1.00 0.42 147.38 1.62 596.9 168 -40.3 40.3
KLB e SG 210.00 0.50 0.48 212.27 -2.27 729.0 162 0.4 0.4
MUN e S 178.00 2.00 0.36 177.44 0.56 739.7 174 -40.3 40.3
MUN e SG 213.30 0.30 0.53 215.23 -1.93 739.7 174 0.4 0.4
NWAO e SG 240.00 0.50 0.47 248.11 -8.11 858.7 168 0.4 0.4
NO VELOCITY RATIOS
Date 1997-04-25
Origin Time 1900 42.41 +- 40.19
Zone 50
Easting 512.53 +- 207.74 Longitude 117.131
Northing 6623.84 +- 150.90 Latitude -30.518
Depth 5.00 +- 183.36 N
Arrival times = 5 S.D. = 0.339 Seismographs = 3
Nearest recorder = 41.8 km Gap = 245.5 deg Accuracy = C
Effects Code = F Imax = 4 Fault =
0 km E ( 76 deg) of BK5
WESTERN AUSTRALIA
200 km NE ( 38 deg) of PERTH
4 km W (274 deg) of Burakin
Record Dur Sync Unc Resp Seismometer Recorder Pol
BAL 0.00 Seismograph details unknown
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.7
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
BAL i-P 49.10 0.10 1.35 49.29 -0.19 41.8 256 7.2 7.2
BAL i S 54.20 0.10 1.22 54.06 0.14 41.8 256 7.2 7.2
MRWA e P 70.90 0.10 0.84 70.41 0.49 181.0 322 -42.2 42.2
MRWA e S 90.80 0.30 0.61 91.34 -0.54 181.0 322 -40.3 40.3
MUN e S 92.00 1.00 0.47 92.01 -0.01 184.2 208 -40.3 40.3
5 times used, S = 0.339
Deferred Data
KLB e S 80.00 2.00 0.43 79.27 0.73 133.3 153 2.3 2.3
Velocity Ratios
BAL MRWA
BAL 1.76 1.68
0.04 0.03
MRWA 1.68 1.70
0.03 0.02
Date 1997-04-26
Origin Time 1409 18.22 +- 0.93
Zone 50
Easting 565.27 +- 8.63 Longitude 117.687
Northing 6518.53 +- 7.04 Latitude -31.466
Depth 5.00 +- 16.70 N
Arrival times = 7 S.D. = 0.290 Seismographs = 4
Nearest recorder = 15.6 km Gap = 187.1 deg Accuracy = B
Effects Code = Imax = 0 Fault =
3 km E ( 67 deg) of KBS
WESTERN AUSTRALIA
182 km E ( 73 deg) of PERTH
18 km N (350 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.7
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i P 20.80 0.10 1.46 20.90 -0.10 15.6 153 18.8 18.8
KLB i S 22.70 0.10 1.31 22.76 -0.06 15.6 153 18.8 18.8
BAL i P 39.80 0.10 1.23 39.71 0.09 133.5 315 -30.8 30.8
BAL i S 54.70 0.10 1.11 55.13 -0.43 133.5 315 2.3 2.3
MUN i P 42.30 0.10 1.22 42.17 0.13 151.2 247 -30.8 30.8
MUN i S 60.00 0.10 1.09 60.01 -0.01 151.2 247 2.0 2.0
MRWA e P 61.10 0.10 0.80 60.31 0.79 297.4 326 -42.2 42.2
7 times used, S = 0.290
Deferred Data
MRWA e S 97.60 0.10 0.72 91.68 5.92 297.4 326 -40.3 40.3
Velocity Ratios
KLB BAL MUN
KLB 1.74 1.68 1.73
0.11 0.03 0.03
BAL 1.68 1.69 0.00
0.03 0.01 0.00
MUN 1.73 0.00 1.74
0.03 0.00 0.01
Date 1997-04-30
Origin Time 0225 35.07 +- 0.38
Zone 50
Easting 564.10 +- 3.45 Longitude 117.675
Northing 6519.21 +- 2.73 Latitude -31.460
Depth 5.00 +- 5.94 N
Arrival times = 11 S.D. = 0.268 Seismographs = 5
Nearest recorder = 16.7 km Gap = 184.4 deg Accuracy = B
Effects Code = Imax = 0 Fault =
3 km NE ( 49 deg) of KBS
WESTERN AUSTRALIA
181 km E ( 73 deg) of PERTH
19 km N (347 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.3
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i-P 37.80 0.10 1.45 37.93 -0.13 16.7 151 17.6 17.6
KLB i S 39.90 0.10 1.30 39.91 -0.01 16.7 151 17.6 17.6
BAL i-P 56.30 0.10 1.23 56.37 -0.07 132.2 315 -30.8 30.8
BAL i S 71.40 0.10 1.11 71.62 -0.22 132.2 315 2.3 2.3
MUN e P 58.90 0.10 0.85 58.91 -0.01 150.3 247 -30.8 30.8
MUN i S 76.60 0.10 1.09 76.63 -0.03 150.3 247 2.0 2.0
NWAO e P 61.70 0.20 0.73 61.36 0.34 167.8 194 -30.8 30.8
NWAO e S 81.30 0.20 0.66 81.17 0.13 167.8 194 -23.9 23.9
MRWA e P 78.00 1.00 0.50 77.01 0.99 296.2 326 -42.2 42.2
MRWA e S 108.90 0.20 0.63 108.27 0.63 296.2 326 -40.3 40.3
MRWA e SMS 114.00 0.10 0.40 114.29 -0.29 296.2 326 -25.4 25.4
11 times used, S = 0.268
Velocity Ratios
KLB BAL MUN NWAO MRWA
KLB 1.77 1.70 1.74 1.73 1.72
0.11 0.03 0.03 0.03 0.06
BAL 1.70 1.71 0.00 1.83 1.73
0.03 0.01 0.00 0.17 0.11
MUN 1.74 0.00 1.74 0.00 1.69
0.03 0.00 0.01 0.00 0.12
NWAO 1.73 1.83 0.00 1.74 1.69
0.03 0.17 0.00 0.02 0.16
MRWA 1.72 1.73 1.69 1.69 1.72
0.06 0.11 0.12 0.16 0.05
Date 1997-04-30
Origin Time 1713 6.36 +- 0.36
Zone 50
Easting 563.74 +- 3.79 Longitude 117.671
Northing 6517.75 +- 3.54 Latitude -31.473
Depth 5.00 +- 6.39 N
Arrival times = 9 S.D. = 0.147 Seismographs = 5
Nearest recorder = 15.6 km Gap = 180.5 deg Accuracy = B
Effects Code = Imax = 0 Fault =
2 km E ( 71 deg) of KBS
WESTERN AUSTRALIA
181 km E ( 73 deg) of PERTH
18 km N (345 deg) of Kellerberrin
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.6
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i-P 9.00 0.10 1.46 9.06 -0.06 15.6 147 18.7 18.7
KLB i S 10.90 0.10 1.31 10.92 -0.02 15.6 147 18.7 18.7
BAL e P 28.00 0.30 0.69 27.78 0.22 133.0 316 -30.8 30.8
BAL e S 43.00 0.30 0.62 43.13 -0.13 133.0 316 2.3 2.3
MUN e P 30.00 0.10 0.85 30.08 -0.08 149.5 247 -30.8 30.8
MUN e S 47.50 0.20 0.67 47.68 -0.18 149.5 247 2.0 2.0
NWAO e P 32.70 0.20 0.73 32.44 0.26 166.3 194 -30.8 30.8
NWAO e S 52.30 0.30 0.61 52.09 0.21 166.3 194 -23.9 23.9
MRWA e SMS 86.00 0.30 0.32 85.85 0.15 297.3 326 -25.4 25.4
9 times used, S = 0.147
Velocity Ratios
KLB BAL MUN NWAO
KLB 1.72 1.69 1.74 1.75
0.11 0.06 0.03 0.04
BAL 1.69 1.69 0.00 0.00
0.06 0.04 0.00 0.00
MUN 1.74 0.00 1.74 0.00
0.03 0.00 0.02 0.00
NWAO 1.75 0.00 0.00 1.74
0.04 0.00 0.00 0.02