Earthquake 20170920-12

2017-09-20 20:09:50.580 203.8 km 6.5 Mwp
18.8175°S, 168.9687°E
Coral Sea
102 km W of Alofi, Niue
Time Error: 1.79 s Depth Error: 12.2 km
Num. Stations: 48 Time RMS: 0.88 s
Num. Phases: 48 Azimuth Gap: 40°
Analysis Type: Manual Max. Intensity (MMI):
Effects Type: Seismic
 

MANUALLY REVIEWED LOCATION

Magnitudes

Preferred Magnitude Stations Error Author Action
6.0 mb 13 0.20 NCMS System-search
Emblem-favorite 6.5 Mwp 7 0.10 NCMS System-search
6.5 Mwp 0 0 NCMS System-search
6.5 M 0 0 NCMS System-search
6.4 Mwb 10 0.10 NCMS System-search
6.3 mB_BB 8 0.20 NCMS System-search
6.5 Mwp 0 0 NCMS System-search
6.5 M 0 0 NCMS System-search
6.3 M 38 0.20 NCMS System-search
6.1 Mwc 12 0.10 NCMS System-search

Origin Details

Ellipse Major:9.20 km Min. Distance:8.70° Fixed Depth:no
Ellipse Minor:7.80 km Max. Distance:169.35° Fixed Phase:no
Ellipse Strike:115.0° Fixed Location:no Fixed Time:no
Author:NCMS Location Method:Inversion Event Type:Suspected Earthquake
External Event ID:HYDRA_RED@18528 External Origin ID:HYDRA_RED@37069

Error Ellipse

Azimuth Dip Magnitude Action
Max 115° 35° 23.8 km System-search
Intermediate 205° 18.2 km System-search
Min 295° 54° 15.1 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 MT 10 83% 0.84 199.0 km 5e+18 nt-m NP1
NP2
26.0
147.0
54.0
55.0
134.0
46.0
3.14e+18 2.41e+18 8.04e+16 1.22e+18 3.47e+17 -4.36e+18 System-search
Ffffffff CMT 12 28% 0.080 2017-09-20 20:10:12.700
15.3842°S, 170.2212°E
214.0 km
2e+18 nt-m NP1
NP2
244.0
335.0
74.0
86.0
176.0
16.0
7.99e+17 1.05e+16 4.91e+17 1.05e+18 -1.14e+18 -1.85e+18 System-search
Channel Time Amplitude Period/Duration Magnitude Event Distance Event Azimuth Action
II.MSVF.00.BHZ 2017-09-20 20:12:17.759 3e+05 24.25 s 6.7 Mwp 8.70° 84.4° System-search
IU.RAO.00.BHZ 2017-09-20 20:13:35.855 1e+03 0.80 s 6.5 mb 15.83° 133.4° System-search
IU.TARA.00.BHZ 2017-09-20 20:14:16.589 6e+04 4.30 s 6.4 Mwp 20.42° 11.4° System-search
IU.TARA.00.BHZ 2017-09-20 20:14:17.490 1e+04 1.95 s 7.1 mb 20.42° 11.4° System-search
IU.SNZO.10.HHZ 2017-09-20 20:14:39.900 9e+03 0.44 s 6.6 mB_BB 22.95° 168.9° System-search
IU.SNZO.10.HHZ 2017-09-20 20:14:45.339 637.5 0.82 s 6.3 mb 22.95° 168.9° System-search
IU.SNZO.10.HHZ 2017-09-20 20:15:10.140 5e+04 33.66 s 6.4 Mwp 22.95° 168.9° System-search
II.TAU.00.BHZ 2017-09-20 20:15:45.640 203.2 1.00 s 5.8 mb 30.19° 212.6° System-search
II.TAU.00.BHZ 2017-09-20 20:16:29.890 2e+03 2.80 s 6.1 mB_BB 30.19° 212.6° System-search
IU.NWAO.00.BHZ 2017-09-20 20:18:13.710 3e+03 2.40 s 5.9 mB_BB 48.17° 242.3° System-search
II.KAPI.00.BHZ 2017-09-20 20:18:25.569 239.8 0.90 s 5.7 mb 49.89° 279.5° System-search
IU.POHA.00.BHZ 2017-09-20 20:18:40.859 1e+04 2.40 s 6.6 mB_BB 51.79° 44.2° System-search
IU.POHA.00.BHZ 2017-09-20 20:18:43.460 222.9 0.90 s 5.8 mb 51.79° 44.2° System-search
IU.POHA.00.BHZ 2017-09-20 20:18:51.660 2e+04 13.95 s 6.3 Mwp 51.79° 44.2° System-search
II.KAPI.00.BHZ 2017-09-20 20:18:54.019 4e+03 30.15 s 5.8 Mwp 49.89° 279.5° System-search
IU.NWAO.00.BHZ 2017-09-20 20:19:09.210 99.4 0.80 s 5.3 mb 48.17° 242.3° System-search
IU.PTCN.00.BHZ 2017-09-20 20:19:13.654 436.5 0.95 s 6.2 mb 56.47° 108.1° System-search
II.KAPI.00.BHZ 2017-09-20 20:19:32.740 4e+03 5.50 s 6.1 mB_BB 49.89° 279.5° System-search
II.ERM.00.BHZ 2017-09-20 20:20:14.279 6e+03 2.30 s 6.6 mB_BB 65.06° 339.0° System-search
II.ERM.00.BHZ 2017-09-20 20:20:14.930 182.9 0.70 s 6.0 mb 65.06° 339.0° System-search
II.ERM.00.BHZ 2017-09-20 20:20:16.829 3e+04 7.30 s 6.6 Mwp 65.06° 339.0° System-search
IU.PET.00.BHZ 2017-09-20 20:20:56.450 1e+04 2.30 s 6.8 mB_BB 72.10° 353.5° System-search
IU.PET.00.BHZ 2017-09-20 20:20:57.150 2e+03 1.50 s 6.6 mb 72.10° 353.5° System-search
IU.PET.00.BHZ 2017-09-20 20:20:58.440 3e+04 6.60 s 6.6 Mwp 72.10° 353.5° System-search
IU.COR.00.BHZ 2017-09-20 20:22:23.039 654.8 1.40 s 6.3 mb 88.15° 41.5° System-search
IU.COLA.00.BHZ 2017-09-20 20:22:26.835 1e+03 1.70 s 5.9 mB_BB 89.71° 17.0° System-search
IU.COLA.00.BHZ 2017-09-20 20:22:31.934 79.0 1.05 s 5.6 mb 89.71° 17.0° System-search
GT.PLCA.00.BHZ 2017-09-20 20:23:10.720 51.8 1.30 s 5.8 mb 99.02° 138.6° System-search
Channel Phase Time Time Residual Dir. Event Distance Event Azimuth Automatic? Defined By Action
II.MSVF.00.BHZ Pn 2017-09-20 20:11:53.640 0.60 s 8.70° 84.4° no Time System-search
IU.RAO.00.BHZ P 2017-09-20 20:13:23.930 1.60 s 15.83° 133.4° no Time System-search
IU.TARA.00.BHZ P 2017-09-20 20:14:12.289 0 s 20.42° 11.4° no Time System-search
IU.SNZO.10.HHZ P 2017-09-20 20:14:36.480 -0.50 s 22.95° 168.9° no Time System-search
II.TAU.00.BHZ P 2017-09-20 20:15:42.990 1.20 s 30.19° 212.6° no Time System-search
IU.NWAO.00.BHZ P 2017-09-20 20:18:10.359 -0.20 s 48.17° 242.3° yes Time System-search
II.KAPI.00.BHZ P 2017-09-20 20:18:23.869 0 s 49.89° 279.5° no Time System-search
IU.POHA.00.BHZ P 2017-09-20 20:18:38.250 0.20 s 51.79° 44.2° no Time System-search
IU.PTCN.00.BHZ P 2017-09-20 20:19:11.630 0 s 56.47° 108.1° no Time System-search
II.ERM.00.BHZ P 2017-09-20 20:20:09.529 0.50 s 65.06° 339.0° no Time System-search
IU.PET.00.BHZ P 2017-09-20 20:20:52.599 0.30 s 72.10° 353.5° no Time System-search
IU.COR.00.BHZ P 2017-09-20 20:22:16.740 -1.50 s 88.15° 41.5° no Time System-search
IU.COLA.00.BHZ P 2017-09-20 20:22:23.259 -1.80 s 89.71° 17.0° yes Time System-search
GT.PLCA.00.BHZ P 2017-09-20 20:23:07.470 -1.00 s 99.02° 138.6° yes Time System-search
IU.MAKZ.00.BHZ Pdif 2017-09-20 20:23:18.670 -0.30 s 101.47° 315.5° no Time System-search
II.KURK.00.BHZ Pdif 2017-09-20 20:23:32.829 0.30 s 104.55° 318.8° no Time System-search
II.AAK.00.BHZ Pdif 2017-09-20 20:23:41.599 3.40 s 105.72° 310.0° no Time System-search
II.BRVK.00.BHZ Pdif 2017-09-20 20:23:58.920 2.20 s 110.00° 320.5° no Time System-search
IU.LVC.00.BHZ Pdif 2017-09-20 20:23:58.960 0.80 s 110.05° 123.7° no Time System-search
OM.BID.--.HHZ PKPdf 2017-09-20 20:28:09.019 -0.60 s 115.89° 287.4° no Time System-search
OM.MDH.--.HHZ PKPdf 2017-09-20 20:28:11.980 -1.30 s 117.82° 289.0° no Time System-search
AE.MSF.--.HHZ PKPdf 2017-09-20 20:28:12.430 -1.20 s 117.96° 289.1° no Time System-search
OM.ASH.--.HHZ PKPdf 2017-09-20 20:28:12.589 -1.00 s 117.94° 288.3° no Time System-search
AE.SHM.--.HHZ PKPdf 2017-09-20 20:28:12.849 -1.10 s 118.18° 289.9° no Time System-search
AE.ALN.--.HHZ PKPdf 2017-09-20 20:28:13.000 -0.90 s 118.12° 287.5° no Time System-search
DN.HAT.--.HHZ PKPdf 2017-09-20 20:28:13.079 -0.40 s 117.90° 288.5° no Time System-search
DN.NAZ.--.HHZ PKPdf 2017-09-20 20:28:13.369 -0.90 s 118.35° 288.6° no Time System-search
DN.FAQ.--.HHZ PKPdf 2017-09-20 20:28:14.180 -0.20 s 118.37° 288.3° no Time System-search
DN.ASU.--.HHZ PKPdf 2017-09-20 20:28:15.359 0.60 s 118.59° 288.1° no Time System-search
AE.AJN.--.HHZ PKPdf 2017-09-20 20:28:16.329 1.00 s 118.88° 288.0° no Time System-search
AE.SRB.--.HHZ PKPdf 2017-09-20 20:28:17.230 0.40 s 119.66° 288.6° no Time System-search
AE.MZR.--.HHZ PKPdf 2017-09-20 20:28:17.339 -0.20 s 120.01° 286.0° no Time System-search
AE.JRN.--.HHZ PKPdf 2017-09-20 20:28:18.779 -0.40 s 120.87° 288.1° no Time System-search
BH.SAK.--.HHZ PKPdf 2017-09-20 20:28:23.200 -0.10 s 123.07° 289.0° no Time System-search
IU.KEV.00.BHZ PKPdf 2017-09-20 20:28:23.230 -0.70 s 124.07° 344.9° no Time System-search
IU.GNI.00.BHZ PKPdf 2017-09-20 20:28:32.809 0.40 s 127.90° 306.4° no Time System-search
II.OBN.00.BHZ PKPdf 2017-09-20 20:28:33.960 0.20 s 129.00° 326.8° no Time System-search
II.KIV.00.BHZ PKPdf 2017-09-20 20:28:34.509 0.60 s 128.80° 311.5° no Time System-search
IU.LSZ.00.BHZ PKPdf 2017-09-20 20:28:35.059 0.60 s 128.63° 231.2° no Time System-search
GO.AKH.--.HHZ PKPdf 2017-09-20 20:28:35.490 1.60 s 128.67° 308.1° no Time System-search
IU.KMBO.00.BHZ PKPdf 2017-09-20 20:28:35.559 0.90 s 128.60° 252.5° yes Time System-search
IU.TSUM.10.BHZ PKPdf 2017-09-20 20:28:41.500 -1.10 s 132.92° 218.0° no Time System-search
IU.ANTO.00.BHZ PKPdf 2017-09-20 20:28:49.119 -0.20 s 136.94° 308.5° no Time System-search
GE.EIL.--.BHZ PKPdf 2017-09-20 20:28:50.049 0.50 s 136.95° 293.3° no Time System-search
II.ESK.00.BHZ PKPdf 2017-09-20 20:28:58.009 -1.80 s 143.08° 352.5° no Time System-search
II.SHEL.00.BHZ PKPbc 2017-09-20 20:29:04.650 0.30 s 145.05° 188.8° no Time System-search
II.BFO.00.BHZ PKPdf 2017-09-20 20:29:08.029 1.80 s 146.63° 336.1° no Time System-search
IU.MACI.--.HHZ PKPdf 2017-09-20 20:29:36.819 2.60 s 169.35° 27.7° no Time System-search

Shake Maps

None

Ground Motion

None

Event 20170920-12

Time: 2017-09-20 20:09:50.580
Position:18.8175°S, 168.9687°E
Place:Coral Sea
Major Place:102 km W of Alofi, Niue
Depth:203.8 km
Magnitude:6.5 Mwp