Data Report
Bulletin / 1993-12
Contributed by CUPWA
Date 1993-12-04
Origin Time 0933 33.48 +- 18.55
Zone 50
Easting 409.42 +- 101.39 Longitude 116.035
Northing 6400.65 +- 73.30 Latitude -32.528
Depth 5.00 +- 73.69 N
Arrival times = 6 S.D. = 1.044 Seismographs = 4
Nearest recorder = 63.0 km Gap = 263.0 deg Accuracy = D
Effects Code = Imax = 0 Fault =
57 km S (180 deg) of AMAZ
WESTERN AUSTRALIA
66 km S (165 deg) of PERTH
23 km S (200 deg) of Jarrahdale
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
MUN e P 43.20 0.50 0.66 43.80 -0.60 63.0 14 4.8 4.8
MUN w S 50.00 1.00 0.53 50.96 -0.96 63.0 14 4.8 4.8
NWAO e S 66.00 0.50 0.57 66.84 -0.84 120.6 111 2.5 2.5
KLB e P 63.20 0.50 0.60 62.94 0.26 193.0 57 -42.2 42.2
KLB e S 87.00 1.00 0.47 84.96 2.04 193.0 57 -40.3 40.3
BAL e P 67.20 0.50 0.60 66.48 0.72 222.2 16 -42.2 42.2
6 times used, S = 1.044
Deferred Data
BAL e S 93.00 1.00 0.48 91.11 1.89 222.2 16 -40.3 40.3
Velocity Ratios
MUN KLB
MUN 1.70 0.00
0.20 0.00
KLB 0.00 1.80
0.00 0.07
Date 1993-12-04
Origin Time 1103 18.22 +- 1.16
Zone 50
Easting 538.10 +- 10.38 Longitude 117.404
Northing 6434.16 +- 6.30 Latitude -32.228
Depth 5.00 +- 61.54 N
Arrival times = 7 S.D. = 0.247 Seismographs = 4
Nearest recorder = 78.2 km Gap = 166.2 deg Accuracy = B
Effects Code = Imax = 0 Fault =
24 km S (177 deg) of QUAI
WESTERN AUSTRALIA
150 km E (102 deg) of PERTH
40 km E ( 72 deg) of Brookton
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 w S 40.00 0.50 0.60 39.86 0.14 78.2 25 3.9 3.9
NWAO e P 31.00 0.10 0.90 31.14 -0.14 79.0 191 3.8 3.8
NWAO i S 40.20 0.10 1.16 40.10 0.10 79.0 191 3.8 3.8
MUN e P 36.70 0.30 0.70 37.19 -0.49 116.2 283 2.6 2.6
MUN i S 50.50 0.20 0.97 50.35 0.15 116.2 283 2.6 2.6
BAL w P2 48.00 1.00 0.32 47.83 0.17 191.6 339 -30.8 30.8
BAL w S2 70.50 1.00 0.27 70.32 0.18 191.6 339 -23.9 23.9
7 times used, S = 0.247
Velocity Ratios
NWAO MUN
NWAO 1.72 1.81
0.02 0.19
MUN 1.81 1.75
0.19 0.04
Date 1993-12-06 Event type = BL
Origin Time 0944 57.73 +- 9.82
Zone 51
Easting 253.47 +- 74.50 Longitude 120.507
Northing 6967.04 +- 54.70 Latitude -27.398
Depth 5.00 +- 98.51 N
Arrival times = 7 S.D. = 0.715 Seismographs = 3
Nearest recorder = 206.1 km Gap = 237.3 deg Accuracy = D
Effects Code = Imax = 0 Fault =
205 km SE (114 deg) of MEEK
WESTERN AUSTRALIA
676 km NE ( 43 deg) of PERTH
183 km NW (334 deg) of Leonora
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
MEEK i P 88.70 0.10 1.18 88.79 -0.09 206.1 293 -42.2 42.2
MEEK i S 112.40 0.20 0.93 111.99 0.41 206.1 293 -40.3 40.3
COOL e SG 167.00 2.00 0.39 165.85 1.15 391.4 171 0.8 0.8
MRWA w P 121.00 5.00 0.36 122.79 -1.79 487.4 244 -42.2 42.2
MRWA e PG 137.00 1.00 0.48 137.25 -0.25 487.4 244 0.6 0.6
MRWA e S 170.00 1.00 0.43 171.18 -1.18 487.4 244 -40.3 40.3
MRWA e SG 193.00 1.00 0.43 192.38 0.62 487.4 244 0.6 0.6
7 times used, S = 0.715
Velocity Ratios
MEEK MRWA
MEEK 1.77 0.00
0.01 0.00
MRWA 0.00 1.77
0.00 0.17
Date 1993-12-08
Origin Time 1214 25.60 +- 57.47
Zone 50
Easting 863.21 +- 828.92 Longitude 120.406
Northing 8146.92 +-1908.03 Latitude -16.732
Depth 32.55 +-2623.14
Arrival times = 6 S.D. = 0.687 Seismographs = 3
Nearest recorder = 494.3 km Gap = 329.2 deg Accuracy = C
Effects Code = Imax = 0 Fault =
466 km NE ( 22 deg) of RP02
WESTERN AUSTRALIA
237 km NW (305 deg) of BROOME
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
MBL i P 89.00 0.10 1.09 88.98 0.02 494.3 186 -30.3 42.2
MBL i S 135.50 0.10 0.98 136.08 -0.58 494.3 186 -33.5 40.3
NANU i P 128.20 0.10 1.03 128.80 -0.60 823.7 217 -30.3 42.2
NANU e S 206.00 0.10 0.65 205.41 0.59 823.7 217 -33.5 40.3
MEEK e P 165.00 0.10 0.70 163.82 1.18 1112.9 189 -30.3 42.2
MEEK e S 267.00 0.10 0.63 266.37 0.63 1112.9 189 -33.5 40.3
6 times used, S = 0.687
Velocity Ratios
MBL NANU MEEK
MBL 1.73 1.80 1.73
0.00 0.01 0.01
NANU 1.80 1.76 1.66
0.01 0.00 0.01
MEEK 1.73 1.66 1.73
0.01 0.01 0.00
Date 1993-12-09
Origin Time 1405 7.71 +- 6.09
Zone 50
Easting 507.19 +- 31.20 Longitude 117.076
Northing 6487.97 +- 63.20 Latitude -31.744
Depth 5.00 +- 420.24 N
Arrival times = 6 S.D. = 1.080 Seismographs = 3
Nearest recorder = 67.0 km Gap = 183.5 deg Accuracy = C
Effects Code = Imax = 0 Fault =
3 km SE (152 deg) of ME3
WESTERN AUSTRALIA
118 km E ( 79 deg) of PERTH
14 km SE (154 deg) of Meckering
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.2
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
KLB i P 18.70 0.10 1.30 18.68 0.02 67.0 75 4.5 4.5
KLB i S 26.80 0.10 1.17 26.28 0.52 67.0 75 4.5 4.5
MUN i P 21.80 0.10 1.28 21.79 0.01 86.1 252 3.5 3.5
MUN i S 32.10 0.10 1.15 31.54 0.56 86.1 252 3.5 3.5
NWAO i P 27.00 0.10 1.23 28.98 -1.98 132.0 173 -30.8 30.8
NWAO i S 45.40 0.10 1.11 44.20 1.20 132.0 173 2.3 2.3
6 times used, S = 1.080
Velocity Ratios
KLB MUN NWAO
KLB 1.74 1.71 2.24
0.03 0.19 0.08
MUN 1.71 1.73 2.56
0.19 0.02 0.14
NWAO 2.24 2.56 1.95
0.08 0.14 0.02
Date 1993-12-11
Origin Time 1514 3.73 +- 0.58
Zone 50
Easting 502.39 +- 3.61 Longitude 117.025
Northing 6495.95 +- 4.72 Latitude -31.672
Depth 5.00 +- 12.89 N
Arrival times = 8 S.D. = 0.253 Seismographs = 4
Nearest recorder = 70.2 km Gap = 99.6 deg Accuracy = A
Effects Code = Imax = 0 Fault =
5 km NW (326 deg) of ME3
WESTERN AUSTRALIA
115 km E ( 75 deg) of PERTH
5 km S (163 deg) of Meckering
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 15.30 0.10 1.30 15.22 0.08 70.2 82 4.3 4.3
KLB i S 23.60 0.20 1.02 23.19 0.41 70.2 82 4.3 4.3
MUN i-P 17.70 0.10 1.28 17.54 0.16 84.5 245 3.6 3.6
MUN i S 27.40 0.10 1.15 27.11 0.29 84.5 245 3.6 3.6
BAL i-P 23.40 0.10 1.24 23.59 -0.19 121.9 345 -30.8 30.8
BAL e S 37.20 0.20 0.68 37.43 -0.23 121.9 345 2.5 2.5
NWAO i+P 25.97 0.01 1.94 26.19 -0.22 140.5 172 -30.8 30.8
NWAO e S 42.60 0.20 0.67 42.57 0.03 140.5 172 2.1 2.1
8 times used, S = 0.253
Deferred Data
MRWA e P 46.00 0.50 0.58 44.84 1.16 289.3 339 -42.2 42.2
MRWA e S 81.00 0.30 0.58 75.48 5.52 289.3 339 -40.3 40.3
Velocity Ratios
KLB MUN BAL NWAO
KLB 1.72 0.00 1.68 1.78
0.03 0.00 0.09 0.06
MUN 0.00 1.69 1.72 1.84
0.00 0.02 0.12 0.06
BAL 1.68 1.72 1.70 0.00
0.09 0.12 0.02 0.00
NWAO 1.78 1.84 0.00 1.75
0.06 0.06 0.00 0.01
Date 1993-12-15
Origin Time 1903 48.00 +- 56.24
Zone 51
Easting 610.94 +- 163.71 Longitude 124.131
Northing 6874.86 +- 164.88 Latitude -28.247
Depth 5.00 +- 420.11 N
Arrival times = 6 S.D. = 2.410 Seismographs = 4
Nearest recorder = 338.1 km Gap = 106.4 deg Accuracy = D
Effects Code = Imax = 0 Fault =
336 km SW (225 deg) of WBN
WESTERN AUSTRALIA
897 km NE ( 65 deg) of PERTH
123 km E (104 deg) of Cosmo Newberry
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 2.4
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
WARB e P 95.00 0.10 0.79 95.02 -0.02 338.1 47 -42.2 42.2
WARB e S 132.00 0.10 0.71 130.04 1.96 338.1 47 -40.3 40.3
COOL e P 106.00 0.10 0.78 103.84 2.16 411.0 223 -42.2 42.2
COOL e S 145.50 0.10 0.70 145.40 0.10 411.0 223 -40.3 40.3
FORT e P 106.00 1.00 0.48 111.50 -5.50 474.7 127 -42.2 42.2
MBL i P 160.50 0.50 0.74 162.60 -2.10 897.2 330 -42.2 42.2
6 times used, S = 2.410
Deferred Data
FORT e S 141.00 1.00 0.43 158.74 -17.74 474.7 127 -40.3 40.3
MEEK e P 143.00 2.00 0.41 123.54 19.46 573.9 286 -42.2 42.2
MEEK e S 191.00 1.00 0.43 179.70 11.30 573.9 286 -40.3 40.3
MBL e S 278.50 0.50 0.47 247.70 30.80 897.2 330 -40.3 40.3
Velocity Ratios
WARB COOL
WARB 1.79 1.23
0.01 0.04
COOL 1.23 1.68
0.04 0.00
Date 1993-12-15
Origin Time 1918 0.81 +- 15.50
Zone 50
Easting 332.64 +- 22.23 Longitude 115.188
Northing 6239.08 +- 13.01 Latitude -33.975
Depth 18.67 +- 164.00
Arrival times = 8 S.D. = 0.177 Seismographs = 5
Nearest recorder = 180.2 km Gap = 256.4 deg Accuracy = B
Effects Code = Imax = 0 Fault =
39 km SW (207 deg) of ABUS
WESTERN AUSTRALIA
233 km S (195 deg) of PERTH
38 km N ( 5 deg) of AUGUSTA
11 km E (104 deg) of Margaret River
Record Dur Sync Unc Resp Seismometer Recorder Pol
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
RKG i+P2 27.70 0.20 0.63 27.69 0.01 180.2 112 -30.8 30.8
RKG i S2 48.50 0.30 0.48 48.52 -0.02 180.2 112 -23.9 23.9
NWAO e P2 34.00 0.20 0.43 33.66 0.34 222.8 58 -30.8 30.8
NWAO i S2 59.10 0.10 0.59 59.27 -0.17 222.8 58 -23.9 23.9
MUN e P 34.40 0.20 0.71 34.58 -0.18 241.1 23 -42.2 42.2
MUN i S2 64.00 0.10 0.58 63.88 0.12 241.1 23 -23.9 23.9
BAL w P 54.00 2.00 0.44 53.79 0.21 399.9 21 -42.2 42.2
MRWA e P 70.00 0.50 0.55 69.88 0.12 532.9 8 -42.2 42.2
8 times used, S = 0.177
Deferred Data
RKG i+P 27.70 0.20 1.04 27.23 0.47 180.2 112 -42.2 42.2
RKG i S 48.50 0.30 0.86 47.14 1.36 180.2 112 -40.3 40.3
MUN e S 60.40 0.50 0.53 59.95 0.45 241.1 23 -40.3 40.3
KLB e P2 54.00 2.00 0.26 52.53 1.47 357.5 42 -30.8 30.8
KLB e S 85.00 1.00 0.45 84.47 0.53 357.5 42 -40.3 40.3
BAL e S 95.50 1.00 0.44 93.39 2.11 399.9 21 -40.3 40.3
MRWA e S 124.00 0.50 0.49 121.40 2.60 532.9 8 -40.3 40.3
NO VELOCITY RATIOS
Date 1993-12-17
Origin Time 0123 58.11 +- 71.43
Zone 50
Easting 847.97 +- 109.39 Longitude 120.375
Northing 7537.11 +- 88.47 Latitude -22.236
Depth 5.00 +- 646.67 N
Arrival times = 5 S.D. = 0.360 Seismographs = 4
Nearest recorder = 131.8 km Gap = 151.1 deg Accuracy = B
Effects Code = Imax = 0 Fault =
131 km SE (154 deg) of MBL
WESTERN AUSTRALIA
284 km SE (139 deg) of PORT HEDLAND
135 km SE (151 deg) of Marble Bar
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
MBL i P 79.20 0.10 1.23 79.35 -0.15 131.8 334 -30.8 30.8
NANU i P 125.20 0.10 1.09 125.05 0.15 503.2 265 -42.2 42.2
MEEK i P 126.60 0.10 1.08 127.06 -0.46 519.4 199 -42.2 42.2
WARB e P 158.00 0.10 0.73 158.11 -0.11 776.3 125 -42.2 42.2
WARB e S 233.00 0.10 0.65 232.40 0.60 776.3 125 -40.3 40.3
5 times used, S = 0.360
Deferred Data
NANU e S 173.00 1.00 0.43 174.84 -1.84 503.2 265 -40.3 40.3
MEEK e S 168.00 0.10 0.68 178.34 -10.34 519.4 199 -40.3 40.3
Velocity Ratios
WARB
WARB 1.75
0.00
Date 1993-12-17
Origin Time 0154 16.09 +- 0.00
Zone 50
Easting 508.31 +- 0.00 Longitude 117.087
Northing 6592.00 +- 0.00 Latitude -30.805
Depth 5.00 +- 0.00 N
Arrival times = 4 S.D. = 0.068 Seismographs = 3
Nearest recorder = 42.5 km Gap = 202.8 deg Accuracy = B
Effects Code = Imax = 0 Fault =
4 km W (277 deg) of CAS
WESTERN AUSTRALIA
173 km NE ( 43 deg) of PERTH
5 km N (346 deg) of Manmanning
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.3
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
BAL i P 23.00 0.10 1.35 23.08 -0.08 42.5 301 7.1 7.1
BAL i S 28.00 0.10 1.22 27.92 0.08 42.5 301 7.1 7.1
KLB i P 33.80 0.10 1.25 33.77 0.03 108.2 143 2.8 2.8
MUN i P 40.50 0.10 1.21 40.52 -0.02 154.6 212 -30.8 30.8
4 times used, S = 0.068
Deferred Data
KLB i S 44.80 0.10 1.13 46.02 -1.22 108.2 143 2.8 2.8
MUN e S 56.80 0.10 0.77 58.81 -2.01 154.6 212 1.9 1.9
NWAO e S 72.00 1.00 0.46 76.51 -4.51 235.6 176 -40.3 40.3
Velocity Ratios
BAL
BAL 1.72
0.04
Date 1993-12-18
Origin Time 1014 43.89 +- 4.09
Zone 50
Easting 411.16 +- 26.95 Longitude 116.054
Northing 6402.92 +- 14.16 Latitude -32.507
Depth 0.00 +- 20.06 C
Arrival times = 7 S.D. = 0.415 Seismographs = 4
Nearest recorder = 60.4 km Gap = 260.7 deg Accuracy = C
Effects Code = Imax = 0 Fault =
55 km S (178 deg) of AMAZ
WESTERN AUSTRALIA
65 km S (163 deg) of PERTH
21 km S (197 deg) of Jarrahdale
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
MUN i P 53.30 0.10 1.31 53.75 -0.45 60.4 13 0.2 0.2
MUN i S 60.50 0.10 1.18 60.58 -0.08 60.4 13 0.2 0.2
NWAO e P 62.90 0.10 0.87 63.45 -0.55 119.9 113 0.1 0.1
NWAO e S 77.00 0.10 0.78 77.01 -0.01 119.9 113 0.1 0.1
KLB i P 73.90 0.10 1.19 73.58 0.32 190.4 58 -42.2 42.2
KLB e S 96.00 0.10 0.75 95.70 0.30 190.4 58 -40.3 40.3
BAL i P 77.60 0.10 1.18 77.11 0.49 219.6 16 -42.2 42.2
7 times used, S = 0.415
Deferred Data
BAL e S 103.50 0.10 0.74 101.85 1.65 219.6 16 -40.3 40.3
Velocity Ratios
MUN NWAO KLB
MUN 1.77 1.72 1.72
0.03 0.06 0.03
NWAO 1.72 1.74 1.73
0.06 0.01 0.05
KLB 1.72 1.73 1.74
0.03 0.05 0.01
Date 1993-12-28
Origin Time 2204 44.66 +- 0.35
Zone 50
Easting 504.11 +- 1.96 Longitude 117.043
Northing 6498.48 +- 3.01 Latitude -31.649
Depth 8.64 +- 6.54
Arrival times = 8 S.D. = 0.121 Seismographs = 4
Nearest recorder = 68.3 km Gap = 100.4 deg Accuracy = A
Effects Code = Imax = 0 Fault =
7 km N (349 deg) of ME3
WESTERN AUSTRALIA
118 km E ( 74 deg) of PERTH
4 km SE (123 deg) of Meckering
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 55.80 0.10 1.30 55.89 -0.09 68.3 84 7.5 7.5
KLB i S 63.80 0.10 1.17 63.68 0.12 68.3 84 7.5 7.5
MUN i-P 58.80 0.10 1.28 58.94 -0.14 87.1 244 5.8 5.8
MUN i S 69.00 0.10 1.15 68.84 0.16 87.1 244 5.8 5.8
BAL i+P 64.00 0.10 1.24 63.93 0.07 119.9 344 -30.8 30.8
BAL e S 77.70 0.30 0.63 77.86 -0.16 119.9 344 4.3 4.3
NWAO i+P 67.10 0.10 1.22 67.13 -0.03 142.8 172 -30.8 30.8
NWAO e S 84.00 0.20 0.67 84.03 -0.03 142.8 172 -23.9 23.9
8 times used, S = 0.121
Velocity Ratios
KLB MUN BAL NWAO
KLB 1.72 1.73 1.70 1.79
0.02 0.20 0.09 0.06
MUN 1.73 1.72 1.67 1.81
0.20 0.02 0.15 0.08
BAL 1.70 1.67 1.71 0.00
0.09 0.15 0.02 0.00
NWAO 1.79 1.81 0.00 1.75
0.06 0.08 0.00 0.02
Date 1993-12-30
Origin Time 0621 9.17 +- 3.33
Zone 50
Easting 517.56 +- 24.66 Longitude 117.186
Northing 6439.55 +- 21.11 Latitude -32.180
Depth 14.30 +- 52.24
Arrival times = 6 S.D. = 0.034 Seismographs = 3
Nearest recorder = 82.8 km Gap = 137.2 deg Accuracy = B
Effects Code = Imax = 0 Fault =
21 km S (201 deg) of QUA
WESTERN AUSTRALIA
129 km E (102 deg) of PERTH
25 km NE ( 45 deg) of Brookton
Record Dur Sync Unc Resp Seismometer Recorder Pol
MAGNITUDES
Code R ML MD MB MS MW MN
No magnitudes known Assign ML 1.2
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
NWAO e P 22.80 0.30 0.72 22.78 0.02 82.8 176 -30.8 30.8
NWAO e S 32.40 0.20 0.70 32.41 -0.01 82.8 176 10.0 10.0
KLB e P 23.00 1.00 0.56 23.07 -0.07 84.9 39 -30.8 30.8
KLB e S 33.00 1.00 0.51 32.96 0.04 84.9 39 9.8 9.8
MUN e P 24.50 0.30 0.71 24.48 0.02 95.0 283 -30.8 30.8
MUN e S 35.70 0.30 0.64 35.71 -0.01 95.0 283 8.7 8.7
6 times used, S = 0.034
Velocity Ratios
NWAO KLB MUN
NWAO 1.70 0.00 0.00
0.05 0.00 0.00
KLB 0.00 1.72 0.00
0.00 0.21 0.00
MUN 0.00 0.00 1.73
0.00 0.00 0.05
Date 1993-12-31
Origin Time 1047 58.64 +- 0.48
Zone 50
Easting 538.69 +- 3.87 Longitude 117.411
Northing 6433.40 +- 2.43 Latitude -32.235
Depth 10.91 +- 12.90
Arrival times = 7 S.D. = 0.040 Seismographs = 4
Nearest recorder = 78.4 km Gap = 167.3 deg Accuracy = A
Effects Code = Imax = 0 Fault =
24 km S (176 deg) of QUAI
WESTERN AUSTRALIA
151 km E (103 deg) of PERTH
40 km E ( 73 deg) of Brookton
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
NWAO i+P 71.60 0.10 1.29 71.56 0.04 78.4 192 8.1 8.1
NWAO i S 80.50 0.10 1.16 80.52 -0.02 78.4 192 8.1 8.1
KLB e P 71.50 0.30 0.72 71.60 -0.10 78.6 24 8.1 8.1
KLB i S 80.60 0.10 1.16 80.58 0.02 78.6 24 8.1 8.1
MUN e P 77.30 0.10 0.87 77.31 -0.01 117.0 283 -30.8 30.8
MUN i S 91.10 0.10 1.12 91.10 0.00 117.0 283 5.5 5.5
BAL e SMS 111.50 0.50 0.30 111.44 0.06 192.5 339 -27.5 27.5
7 times used, S = 0.040
Deferred Data
KLB e SMS 86.20 0.20 0.39 84.99 1.21 78.6 24 -42.2 42.2
BAL e PMP 89.00 0.30 0.40 88.46 0.54 192.5 339 -33.2 33.2
BAL e P2 89.00 0.30 0.40 87.89 1.11 192.5 339 -30.8 30.8
BAL e S2 111.50 0.50 0.30 110.32 1.18 192.5 339 -23.9 23.9
Velocity Ratios
NWAO KLB MUN
NWAO 1.69 0.00 1.86
0.02 0.00 0.10
KLB 0.00 1.71 1.81
0.00 0.05 0.17
MUN 1.86 1.81 1.74
0.10 0.17 0.01
Date 1993-12-31
Origin Time 1940 1.96 +- 8.35
Zone 52
Easting 262.45 +- 18.94 Longitude 126.731
Northing 7800.03 +- 17.96 Latitude -19.881
Depth 5.00 +- 63.22 N
Arrival times = 10 S.D. = 1.112 Seismographs = 7
Nearest recorder = 505.5 km Gap = 127.8 deg Accuracy = C
Effects Code = Imax = 0 Fault =
505 km SW (204 deg) of KNA
WESTERN AUSTRALIA
Record Dur Sync Unc Resp Seismometer Recorder Pol
ASPA 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
KNA w P 69.00 2.00 0.43 69.19 -0.19 505.5 25 -42.2 42.2
KNA w S 119.00 2.00 0.38 119.19 -0.19 505.5 25 -40.3 40.3
KNA e SG 141.00 1.00 0.43 141.61 -0.61 505.5 25 0.6 0.6
MBL e S 168.00 1.00 0.42 167.82 0.18 736.5 257 -40.3 40.3
ASPA e P 112.70 0.30 0.58 111.22 1.48 852.7 121 -42.2 42.2
ASPA e S 190.70 0.50 0.47 192.37 -1.67 852.7 121 -40.3 40.3
MTN e P 118.00 0.50 0.52 117.97 0.03 909.0 31 -42.2 42.2
MEEK e S 249.00 2.00 0.35 249.30 -0.30 1123.2 226 -40.3 40.3
NANU e S 267.50 2.00 0.35 268.22 -0.72 1213.5 253 -40.3 40.3
MRWA e P 189.00 1.00 0.44 190.76 -1.76 1510.8 224 -42.2 42.2
10 times used, S = 1.112
Deferred Data
MBL e P 105.00 2.00 0.40 97.12 7.88 736.5 257 -42.2 42.2
MTN e S 207.00 1.00 0.41 204.12 2.88 909.0 31 -40.3 40.3
MRWA e S 326.00 2.00 0.35 330.85 -4.85 1510.8 224 -40.3 40.3
BAL e S 342.00 2.00 0.35 342.93 -0.93 1568.2 218 -40.3 40.3
Velocity Ratios
KNA ASPA
KNA 1.75 1.64
0.08 0.15
ASPA 1.64 1.70
0.15 0.01