Earthquake 20170926-7

2017-09-26 04:20:00.160 96.8 km 6.4 Mwb
23.7014°S, 177.0411°W
South Pacfic Ocean
339 km SW of Nuku?alofa, Tonga
Time Error: 1.45 s Depth Error: 12.7 km
Num. Stations: 37 Time RMS: 0.71 s
Num. Phases: 38 Azimuth Gap: 55°
Analysis Type: Manual Max. Intensity (MMI):
Effects Type: Seismic
 

MANUALLY REVIEWED LOCATION

Magnitudes

Preferred Magnitude Stations Error Author Action
6.2 mb 14 0.20 NCMS System-search
6.1 mb 0 0 NCMS System-search
6.4 M 0 0 NCMS System-search
6.5 mB_BB 11 0.20 NCMS System-search
Emblem-favorite 6.4 Mwb 19 0.10 NCMS System-search
6.3 Mwc 66 0 NCMS System-search
6.4 Mwb 0 0 NCMS System-search
6.3 M 116 0.20 NCMS System-search
6.6 Mwp 6 0.10 NCMS System-search
7.2 ML 2 0.30 NCMS System-search

Origin Details

Ellipse Major:8.90 km Min. Distance:5.58° Fixed Depth:no
Ellipse Minor:7.70 km Max. Distance:155.05° Fixed Phase:no
Ellipse Strike:180.0° Fixed Location:no Fixed Time:no
Author:NCMS Location Method:Inversion Event Type:Suspected Earthquake
External Event ID:HYDRA_RED@18661 External Origin ID:HYDRA_RED@37316

Error Ellipse

Azimuth Dip Magnitude Action
Max 185° 36° 22.3 km System-search
Intermediate 289° 17° 18.1 km System-search
Min 39° 48° 17.3 km System-search
Type Traces % DC Misfit/Var. Red. Centroid Best Double Couple Moment Tensor Action
M0 Plane Strike Dip Rake Mrr Mrt Mrp Mtt Mtp Mpp
Ffffffff CMT 66 80% 0.55 2017-09-26 04:20:19.700
23.3466°S, 176.5169°W
67.0 km
3e+18 nt-m NP1
NP2
28.0
200.0
2.0
88.0
98.0
90.0
4.39e+17 -1.09e+18 -3.02e+18 -3.26e+17 6.45e+16 -1.12e+17 System-search
Ffffffff MT 19 88% 0.81 103.0 km 5e+18 nt-m NP1
NP2
143.0
24.0
15.0
83.0
-150.0
-77.0
-1.06e+18 -1.9e+18 -4.19e+18 -8.12e+17 -1.24e+17 1.87e+18 System-search
Channel Time Amplitude Period/Duration Magnitude Event Distance Event Azimuth Action
IU.RAO.00.BHZ 2017-09-26 04:21:46.890 3e+05 25.15 s 6.5 Mwp 5.58° 188.0° System-search
II.MSVF.00.BHZ 2017-09-26 04:22:13.410 2e+05 20.10 s 6.4 Mwp 7.50° 321.3° System-search
IU.RAO.00.BH2 2017-09-26 04:22:31.615 1e+05 0.90 s 7.2 ML 5.58° 188.0° System-search
IU.TARA.00.BHZ 2017-09-26 04:25:33.184 1e+04 1.45 s 6.6 mB_BB 26.75° 337.2° System-search
IU.TARA.00.BHZ 2017-09-26 04:25:34.335 1e+03 0.90 s 6.4 mb 26.75° 337.2° System-search
II.TAU.00.BHZ 2017-09-26 04:26:48.410 880.1 1.90 s 6.4 mb 35.07° 228.1° System-search
IU.PTCN.00.BHZ 2017-09-26 04:27:47.335 2e+04 2.05 s 7.2 mB_BB 42.61° 101.9° System-search
IU.PTCN.00.BHZ 2017-09-26 04:27:48.660 3e+03 1.35 s 6.9 mb 42.61° 101.9° System-search
II.TAU.00.BHZ 2017-09-26 04:27:50.710 3e+03 5.20 s 6.4 mB_BB 35.07° 228.1° System-search
IU.POHA.00.BHZ 2017-09-26 04:29:16.309 592.4 1.20 s 6.3 mb 48.02° 27.7° System-search
IU.POHA.00.BHZ 2017-09-26 04:29:18.309 5e+03 4.80 s 6.6 mB_BB 48.02° 27.7° System-search
IU.NWAO.00.BHZ 2017-09-26 04:29:47.069 209.5 1.20 s 6.1 mb 57.78° 244.9° System-search
II.KAPI.00.BHZ 2017-09-26 04:30:23.519 6e+03 2.40 s 6.7 mB_BB 63.49° 276.3° System-search
II.KAPI.00.BHZ 2017-09-26 04:30:26.059 494.0 1.40 s 6.3 mb 63.49° 276.3° System-search
II.KAPI.00.BHZ 2017-09-26 04:31:07.920 5e+04 47.40 s 6.8 Mwp 63.49° 276.3° System-search
II.ERM.00.BHZ 2017-09-26 04:31:33.940 3e+03 5.60 s 6.3 mB_BB 75.03° 330.4° System-search
II.ERM.00.BHZ 2017-09-26 04:31:34.890 127.9 0.90 s 5.8 mb 75.03° 330.4° System-search
IU.PET.00.BHZ 2017-09-26 04:31:56.400 4e+03 2.00 s 6.4 mB_BB 79.28° 345.3° System-search
IU.PET.00.BHZ 2017-09-26 04:31:57.599 402.2 1.10 s 6.2 mb 79.28° 345.3° System-search
IU.COR.00.BHZ 2017-09-26 04:32:22.200 3e+03 4.20 s 6.4 mB_BB 83.81° 35.5° System-search
IU.COR.00.BHZ 2017-09-26 04:32:22.650 304.0 1.40 s 6.1 mb 83.81° 35.5° System-search
II.ERM.00.BHZ 2017-09-26 04:32:24.890 1e+05 51.95 s 7.1 Mwp 75.03° 330.4° System-search
IU.COR.00.BHZ 2017-09-26 04:32:34.200 7e+03 14.35 s 6.2 Mwp 83.81° 35.5° System-search
GT.PLCA.00.BHZ 2017-09-26 04:32:34.914 662.0 1.55 s 6.4 mb 86.44° 133.2° System-search
IU.PAYG.00.BHZ 2017-09-26 04:32:36.200 6e+03 2.30 s 6.8 mB_BB 86.76° 89.4° System-search
IU.PAYG.00.BHZ 2017-09-26 04:32:37.650 753.5 1.70 s 6.5 mb 86.76° 89.4° System-search
IU.PET.00.BHZ 2017-09-26 04:32:39.750 3e+04 45.90 s 6.7 Mwp 79.28° 345.3° System-search
CU.TGUH.00.BHZ 2017-09-26 04:33:14.539 850.7 2.20 s 6.4 mB_BB 95.33° 77.2° System-search
CU.TGUH.00.BHZ 2017-09-26 04:33:15.015 227.3 2.00 s 6.3 mb 95.33° 77.2° System-search
IU.OTAV.00.BHZ 2017-09-26 04:33:28.309 499.8 5.70 s 6.2 mB_BB 97.96° 93.4° System-search
II.NNA.00.BHZ 2017-09-26 04:33:41.119 49.8 0.90 s 5.9 mb 94.38° 105.2° System-search
IU.OTAV.00.BHZ 2017-09-26 04:34:06.359 33.1 1.50 s 5.6 mb 97.96° 93.4° System-search
Channel Phase Time Time Residual Dir. Event Distance Event Azimuth Automatic? Defined By Action
IU.RAO.00.BHZ Pn 2017-09-26 04:21:20.839 0.10 s 5.58° 188.0° no Time System-search
II.MSVF.00.BHZ Pn 2017-09-26 04:21:53.309 6.50 s 7.50° 321.3° yes Time System-search
IU.TARA.00.BHZ P 2017-09-26 04:25:30.410 -0.50 s 26.75° 337.2° yes Time System-search
II.TAU.00.BHZ P 2017-09-26 04:26:43.960 0.20 s 35.07° 228.1° yes Time System-search
IU.PTCN.00.BHZ P 2017-09-26 04:27:46.609 -0.40 s 42.61° 101.9° yes Time System-search
IU.POHA.00.BHZ P 2017-09-26 04:28:29.509 -0.40 s 48.02° 27.7° yes Time System-search
II.TAU.00.BHZ PcP 2017-09-26 04:29:14.359 0.80 s 35.07° 228.1° yes Time System-search
IU.NWAO.00.BHZ P 2017-09-26 04:29:40.970 -0.50 s 57.78° 244.9° no Time System-search
II.KAPI.00.BHZ P 2017-09-26 04:30:20.519 0 s 63.49° 276.3° no Time System-search
IU.DAV.00.BHZ P 2017-09-26 04:30:22.740 0.30 s 63.80° 291.2° yes Time System-search
II.ERM.00.BHZ P 2017-09-26 04:31:32.940 1.90 s 75.03° 330.4° no Time System-search
IU.PET.00.BHZ P 2017-09-26 04:31:53.849 -0.70 s 79.28° 345.3° no Time System-search
IU.COR.00.BHZ P 2017-09-26 04:32:19.849 1.20 s 83.81° 35.5° no Time System-search
GT.PLCA.00.BHZ P 2017-09-26 04:32:30.240 -2.00 s 86.44° 133.2° no Time System-search
IU.PAYG.00.BHZ P 2017-09-26 04:32:35.650 1.50 s 86.76° 89.4° no Time System-search
II.NNA.00.BHZ P 2017-09-26 04:33:10.119 0.40 s 94.38° 105.2° no Time System-search
CU.TGUH.00.BHZ P 2017-09-26 04:33:13.940 0 s 95.33° 77.2° no Time System-search
IU.OTAV.00.BHZ P 2017-09-26 04:33:27.210 0.60 s 97.96° 93.4° no Time System-search
II.KURK.00.BHZ PKPdf 2017-09-26 04:38:32.279 -1.00 s 116.93° 316.1° no Time System-search
II.AAK.00.BHZ PKPdf 2017-09-26 04:38:37.259 -0.40 s 118.95° 306.7° no Time System-search
II.BRVK.00.BHZ PKPdf 2017-09-26 04:38:42.630 -0.60 s 122.14° 318.7° no Time System-search
IU.KBL.--.BHZ PKPdf 2017-09-26 04:38:44.519 0.40 s 122.16° 296.7° no Time System-search
DN.HAT.--.HHZ PKPpre 2017-09-26 04:38:46.829 -4.70 s 131.77° 282.5° yes System-search
AE.ALN.--.HHZ PKPpre 2017-09-26 04:38:47.069 -4.70 s 131.97° 281.4° yes System-search
OM.BID.--.HHZ PKPpre 2017-09-26 04:38:49.490 1.00 s 129.73° 281.3° yes System-search
OM.ASH.--.HHZ PKPpre 2017-09-26 04:38:49.500 -2.10 s 131.81° 282.3° yes System-search
II.UOSS.10.BHZ PKPpre 2017-09-26 04:38:51.690 0.20 s 131.73° 282.6° yes System-search
AE.MSF.--.HHZ PKPpre 2017-09-26 04:38:52.140 0.50 s 131.84° 283.2° yes System-search
DN.NAZ.--.HHZ PKPpre 2017-09-26 04:38:53.119 0.90 s 132.22° 282.6° yes System-search
IU.KEV.00.BHZ PKPpre 2017-09-26 04:38:53.119 1.60 s 131.77° 349.0° no System-search
DN.ASU.--.HHZ PKPpre 2017-09-26 04:38:54.859 2.20 s 132.45° 282.0° yes System-search
DN.FAQ.--.HHZ PKPdf 2017-09-26 04:38:59.049 -4.30 s 132.24° 282.2° no Time System-search
OM.BID.--.HHZ PKPdf 2017-09-26 04:38:59.079 0.40 s 129.73° 281.3° no Time System-search
OM.MDH.--.HHZ PKPdf 2017-09-26 04:39:01.650 -0.70 s 131.70° 283.1° no Time System-search
AE.ALN.--.HHZ PKPdf 2017-09-26 04:39:02.480 -0.40 s 131.97° 281.4° no Time System-search
DN.ASU.--.HHZ PKPdf 2017-09-26 04:39:02.930 -0.80 s 132.45° 282.0° no Time System-search
DN.NAZ.--.HHZ PKPdf 2017-09-26 04:39:02.990 -0.30 s 132.22° 282.6° no Time System-search
AE.MSF.--.HHZ PKPdf 2017-09-26 04:39:03.140 0.50 s 131.84° 283.2° no Time System-search
AE.UMQ.--.HHZ PKPdf 2017-09-26 04:39:03.829 0.40 s 132.31° 283.3° no Time System-search
IU.LSZ.00.BHZ PKPdf 2017-09-26 04:39:04.960 -2.30 s 134.08° 214.7° yes Time System-search
AE.SRB.--.HHZ PKPdf 2017-09-26 04:39:05.640 -0.10 s 133.53° 282.6° no Time System-search
II.OBN.00.BHZ PKPpre 2017-09-26 04:39:08.440 -1.10 s 139.97° 330.2° no System-search
IU.TSUM.10.BHZ PKPdf 2017-09-26 04:39:10.579 1.50 s 135.03° 199.6° no Time System-search
BH.SAK.--.HHZ PKPdf 2017-09-26 04:39:14.140 2.00 s 136.95° 282.9° no Time System-search
IU.GNI.00.BHZ PKPpre 2017-09-26 04:39:14.990 1.70 s 141.32° 304.9° no System-search
II.KIV.00.BHZ PKPpre 2017-09-26 04:39:15.440 1.00 s 141.78° 311.4° no System-search
GO.AKH.--.HHZ PKPpre 2017-09-26 04:39:16.880 1.90 s 141.94° 307.2° yes System-search
II.ESK.00.BHZ PKPdf 2017-09-26 04:39:33.109 2.20 s 148.09° 6.7° no Time System-search
IU.ANTO.00.BHZ PKPdf 2017-09-26 04:39:34.539 -0.30 s 150.13° 309.3° no Time System-search
GE.EIL.--.BHZ PKPdf 2017-09-26 04:39:36.180 0.10 s 150.86° 288.2° no Time System-search
II.BFO.00.BHZ PKPdf 2017-09-26 04:39:40.759 -0.90 s 155.05° 351.4° yes Time System-search

Shake Maps

None

Ground Motion

None

Event 20170926-7

Time: 2017-09-26 04:20:00.160
Position:23.7014°S, 177.0411°W
Place:South Pacfic Ocean
Major Place:339 km SW of Nuku?alofa, Tonga
Depth:96.8 km
Magnitude:6.4 Mwb