Data Report
Bulletin / 2023-04
Contributed by CUPWA
Date 2023-04-03
Origin Time 2343 30.74 +- 0.90
Zone 50
Easting 524.11 +- 6.93 Longitude 117.252
Northing 6574.55 +- 6.01 Latitude -30.962
Depth 1.44 +- 134.29
Arrival times = 10 S.D. = 0.177 Seismographs = 6
Nearest recorder = 64.9 km Gap = 112.9 deg Accuracy = C
Effects Code = Imax = 0 Fault =
20 km SE (145 deg) of CAS
WESTERN AUSTRALIA
173 km NE ( 51 deg) of PERTH
19 km SE (131 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 2.7
DATA USED
Code Wave AT +- WT CT DT Dist Azim Ad Ae
BLDU P 41.20 0.10 1.31 41.33 -0.13 64.9 306 1.6 1.6
BLDU S 48.90 1.00 0.74 48.67 0.23 64.9 306 1.6 1.6
MEKS P 44.66 0.10 1.28 44.52 0.14 84.5 193 1.1 1.1
KLBR P 44.50 0.10 1.28 44.54 -0.04 84.6 145 1.2 1.2
KLBR S 54.00 1.00 0.73 54.11 -0.11 84.6 145 1.2 1.2
BCON P 44.50 0.10 1.28 44.62 -0.12 85.0 35 1.2 1.2
BCON S 54.60 1.00 0.73 54.23 0.37 85.0 35 1.2 1.2
WATG P 45.90 0.20 1.10 46.08 -0.18 94.0 74 0.9 0.9
WATG S 57.00 1.00 0.72 56.71 0.29 94.0 74 0.9 0.9
COR2 P 52.60 1.00 0.78 52.50 0.10 133.3 159 0.7 0.7
10 times used, S = 0.177
Deferred Data
MEKS S 55.00 1.00 0.73 54.08 0.92 84.5 193 1.1 1.1
COR2 S 67.90 1.00 0.70 67.58 0.32 133.3 159 0.7 0.7
Velocity Ratios
BLDU KLBR BCON WATG
BLDU 1.74 0.00 0.00 0.00
0.11 0.00 0.00 0.00
KLBR 0.00 1.69 0.00 0.00
0.00 0.09 0.00 0.00
BCON 0.00 0.00 1.73 0.00
0.00 0.00 0.09 0.00
WATG 0.00 0.00 0.00 1.73
0.00 0.00 0.00 0.09
Date 2023-04-12
Origin Time 2211 41.77 +- 0.83
Zone 50
Easting 560.69 +- 7.82 Longitude 117.637
Northing 6552.61 +- 5.44 Latitude -31.159
Depth -0.47 +- 113.88
Arrival times = 9 S.D. = 0.148 Seismographs = 6
Nearest recorder = 49.2 km Gap = 118.3 deg Accuracy = B
Effects Code = Imax = 0 Fault =
10 km N (353 deg) of YBI1
WESTERN AUSTRALIA
191 km NE ( 63 deg) of PERTH
39 km SE (158 deg) of Koorda
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
KLBR P 49.70 0.10 1.34 49.81 -0.11 49.2 166 -0.2 -0.2
KLBR S 55.20 1.00 0.76 55.38 -0.18 49.2 166 -0.2 -0.2
WATG P 53.40 0.10 1.30 53.44 -0.04 71.5 48 -0.3 -0.3
WATG S 61.60 1.00 0.74 61.53 0.07 71.5 48 -0.3 -0.3
MEKS P 55.50 0.10 1.28 55.28 0.22 82.8 223 -0.2 -0.2
BCON P 56.90 0.10 1.27 56.78 0.12 92.0 7 -0.1 -0.1
COR2 P 58.68 0.10 1.26 58.63 0.05 103.3 173 -0.1 -0.1
BLDU P 59.10 0.20 1.09 59.30 -0.20 107.4 304 -0.1 -0.1
BLDU S 71.30 1.00 0.71 71.44 -0.14 107.4 304 -0.1 -0.1
9 times used, S = 0.148
Deferred Data
BCON S 67.60 1.00 0.72 67.19 0.41 92.0 7 -0.1 -0.1
COR2 S 71.00 1.00 0.71 70.32 0.68 103.3 173 -0.1 -0.1
Velocity Ratios
KLBR WATG BLDU
KLBR 1.69 0.00 0.00
0.15 0.00 0.00
WATG 0.00 1.71 0.00
0.00 0.10 0.00
BLDU 0.00 0.00 1.70
0.00 0.00 0.08
Date 2023-04-13
Origin Time 0130 37.47 +- 0.61
Zone 50
Easting 498.72 +- 9.46 Longitude 116.986
Northing 6309.60 +- 7.53 Latitude -33.353
Depth 2.90 +- 6.69
Arrival times = 8 S.D. = 0.035 Seismographs = 5
Nearest recorder = 1.7 km Gap = 169.1 deg Accuracy = A
Effects Code = Imax = 0 Fault =
1 km NE ( 58 deg) of AJ01
WESTERN AUSTRALIA
200 km NW (336 deg) of ALBANY
189 km SE (146 deg) of PERTH
4 km W (266 deg) of Arthur River
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
AJ02 i P 38.11 0.03 2.10 38.12 -0.01 1.7 67 54.9 62.5
AJ02 i S 38.45 0.30 1.19 38.46 -0.01 1.7 67 58.0 61.1
ARV4 i P 38.37 0.03 2.03 38.37 -0.00 3.6 216 28.2 44.9
ARV4 i S 38.87 0.30 1.15 38.84 0.03 3.6 216 34.0 40.9
NWAO P 46.46 0.10 1.33 46.49 -0.03 52.6 25 -20.5 41.3
NWAO S 52.40 1.00 0.75 52.29 0.11 52.6 25 1.0 24.2
RKGY P 60.02 0.20 1.07 60.06 -0.04 139.3 180 -20.5 41.3
ONGR P 60.60 0.20 1.06 60.55 0.05 142.5 113 -20.5 41.3
8 times used, S = 0.035
Deferred Data
RKGY S 74.80 1.00 0.70 75.41 -0.61 139.3 180 -16.6 29.0
ONGR S 77.10 1.00 0.69 76.24 0.86 142.5 113 -16.6 29.0
Velocity Ratios
AJ02 ARV4 NWAO
AJ02 1.53 0.00 1.67
0.57 0.00 0.18
ARV4 0.00 1.55 1.67
0.00 0.40 0.19
NWAO 1.67 1.67 1.66
0.18 0.19 0.13
Date 2023-04-14
Origin Time 1214 0.60 +- 90.02
Zone 50
Easting 499.70 +- 610.49 Longitude 116.997
Northing 6307.99 +- 517.28 Latitude -33.367
Depth -0.13 +- 484.96
Arrival times = 5 S.D. = 0.070 Seismographs = 3
Nearest recorder = 2.3 km Gap = 223.5 deg Accuracy = B
Effects Code = Imax = 0 Fault =
1 km N ( 18 deg) of AJ03
WESTERN AUSTRALIA
198 km NW (336 deg) of ALBANY
190 km SE (146 deg) of PERTH
4 km SW (238 deg) of Arthur River
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
AJ02 i P 1.04 0.03 2.02 1.08 -0.04 2.3 13 -3.2 -3.2
AJ02 i S 1.40 0.30 1.15 1.30 0.10 2.3 13 -3.2 -3.2
ARV4 i P 1.27 0.03 1.99 1.31 -0.04 3.4 247 -2.1 -2.1
ARV4 i S 1.75 0.30 1.13 1.64 0.11 3.4 247 -2.1 -2.1
NWAO P 10.13 0.10 1.33 10.10 0.03 53.6 24 -36.7 36.7
5 times used, S = 0.070
Deferred Data
NWAO S 16.10 1.00 0.75 15.98 0.12 53.6 24 -24.2 24.2
RKGY P 23.75 0.20 1.07 23.29 0.46 137.7 180 -41.3 41.3
RKGY S 39.20 1.00 0.70 38.50 0.70 137.7 180 -29.0 29.0
ONGR P 24.20 0.20 1.07 23.79 0.41 141.0 113 -41.3 41.3
ONGR S 40.40 1.00 0.70 39.36 1.04 141.0 113 -29.0 29.0
Velocity Ratios
AJ02 ARV4
AJ02 1.82 0.00
0.87 0.00
ARV4 0.00 1.72
0.00 0.55
Date 2023-04-22
Origin Time 1238 46.01 +- 2.74
Zone 50
Easting 640.49 +- 15.17 Longitude 118.520
Northing 6244.76 +- 9.43 Latitude -33.928
Depth -0.10 +- 26.87
Arrival times = 9 S.D. = 0.129 Seismographs = 6
Nearest recorder = 13.5 km Gap = 219.0 deg Accuracy = C
Effects Code = Imax = 0 Fault =
13 km SE (121 deg) of ONGR
WESTERN AUSTRALIA
332 km SE (132 deg) of PERTH
133 km NE ( 27 deg) of ALBANY
48 km E ( 90 deg) of Gnowangerup
Record Dur Sync Unc Resp Seismometer Recorder Pol
AALB 0.00 Seismograph details unknown
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
ONGR P 48.22 0.10 1.47 48.22 -0.00 13.5 301 0.8 0.8
ONGR S 49.90 1.00 0.83 49.75 0.15 13.5 301 0.8 0.8
AALB P 67.60 0.40 0.93 67.48 0.12 131.6 205 -0.0 -0.0
AKUL P 69.44 0.20 1.06 69.35 0.09 143.6 346 -30.8 30.8
AKUL S 85.60 1.00 0.69 85.69 -0.09 143.6 346 0.1 0.1
ARV4 P 70.95 0.20 0.98 71.15 -0.20 156.7 292 -30.8 30.8
RKGY P 71.65 0.30 0.97 71.75 -0.10 160.9 241 -30.8 30.8
NWAO P 72.20 0.30 0.97 72.08 0.12 163.2 312 -30.8 30.8
NWAO S 90.90 1.00 0.69 91.10 -0.20 163.2 312 0.1 0.1
9 times used, S = 0.129
Deferred Data
ARV4 S 89.80 1.00 0.55 89.30 0.50 156.7 292 -0.0 -0.0
MUN P 90.10 0.30 0.92 89.64 0.46 305.6 314 -42.2 42.2
WATG P 96.80 0.30 0.90 95.67 1.13 355.6 355 -42.2 42.2
Velocity Ratios
ONGR AKUL NWAO
ONGR 1.76 1.68 1.71
0.56 0.12 0.11
AKUL 1.68 1.69 0.00
0.12 0.06 0.00
NWAO 1.71 0.00 1.71
0.11 0.00 0.06
Date 2023-04-24
Origin Time 1606 2.01 +- 12.22
Zone 50
Easting 704.43 +- 78.65 Longitude 119.174
Northing 6413.01 +- 25.86 Latitude -32.401
Depth 2.00 +- 47.02 N
Arrival times = 7 S.D. = 0.655 Seismographs = 6
Nearest recorder = 100.5 km Gap = 230.5 deg Accuracy = D
Effects Code = Imax = 0 Fault =
29 km E ( 79 deg) of HYDN
WESTERN AUSTRALIA
317 km E (100 deg) of PERTH
29 km E ( 79 deg) of Hyden
Record Dur Sync Unc Resp Seismometer Recorder Pol
COLG 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
AKUL P 18.20 0.10 1.26 18.40 -0.20 100.5 252 1.3 1.3
KLBR P 26.70 0.20 1.05 27.64 -0.94 161.3 303 -30.8 30.8
ONGR P 29.80 0.20 1.04 29.93 -0.13 177.7 203 -30.8 30.8
ONGR S 50.70 1.00 0.68 50.79 -0.09 177.7 203 -40.3 40.3
NWAO P 31.80 0.30 0.96 31.55 0.25 191.1 251 -42.2 42.2
WATG P 33.30 0.30 0.95 33.45 -0.15 206.9 333 -42.2 42.2
MEKS P 35.61 0.10 1.18 34.56 1.05 216.0 290 -42.2 42.2
7 times used, S = 0.655
Deferred Data
AKUL S 31.40 1.00 0.72 29.77 1.63 100.5 252 1.3 1.3
KLBR S 46.50 1.00 0.69 46.58 -0.08 161.3 303 0.8 0.8
MEKS SG 62.80 1.00 0.67 61.68 1.12 216.0 290 0.6 0.6
COLG P 36.80 0.30 0.93 38.49 -1.69 248.3 50 -42.2 42.2
BCON P 41.40 0.30 0.93 40.53 0.87 265.3 329 -42.2 42.2
Velocity Ratios
ONGR
ONGR 1.75
0.05