Earthquake 20170420-7

2017-04-20 22:59:25.680 10.0 km 5.5 MT
20.4364°S, 174.3741°W
South Pacfic Ocean
119 km NE of Nuku?alofa, Tonga
Time Error: 1.98 s Depth Error:
Num. Stations: 24 Time RMS: 0.97 s
Num. Phases: 24 Azimuth Gap: 106°
Analysis Type: Manual Max. Intensity (MMI):
Effects Type:
 

MANUALLY REVISED LOCATION

Magnitudes

Preferred Magnitude Stations Error Author Action
5.7 Mb 4 1.0 NCMS System-search
4.6 mblg 1 1.0 NCMS System-search
5.3 Ms 20 1.0 NCMS System-search
5.5 Mwb 7 1.0 NCMS System-search
Emblem-favorite 5.5 MT NCMS System-search

Origin Details

Ellipse Major:12.80 km Min. Distance:24.98° Fixed Depth:yes
Ellipse Minor:9.10 km Max. Distance:152.06° Fixed Phase:no
Ellipse Strike:87.0° Fixed Location:no Fixed Time:no
Author:NCMS Location Method:Inversion Event Type:Earthquake
External Event ID:HYDRA_RED@23237 External Origin ID:HYDRA_RED@97752

Error Ellipse

Azimuth Dip Magnitude Action
Max 87° 25.6 km System-search
Intermediate 177° 18.3 km System-search
Min 0 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 7 15% 0.49 12.0 km 2e+17 nt-m NP1
NP2
50.0
240.0
38.0
52.0
82.0
96.0
1.56e+17 -4.83e+16 -2.82e+16 -1.51e+17 -1.84e+17 -5.03e+15 System-search
Channel Time Amplitude Period/Duration Magnitude Event Distance Event Azimuth Action
IU.RAO.00.BHZ 2017-04-20 23:04:00.730 6e+03 1.13 s 4.6 mblg 9.34° 199.5° System-search
IU.TARA.00.BHZ 2017-04-20 23:04:51.460 3e+03 1.20 s 5.7 Mb 25.00° 328.0° System-search
II.TAU.00.BHZ 2017-04-20 23:06:52.759 2e+03 1.40 s 5.3 Mb 39.09° 226.0° System-search
IU.MIDW.00.BHZ 2017-04-20 23:08:09.210 3e+04 1.65 s 6.0 Mb 48.50° 356.0° System-search
IU.NWAO.00.BHZ 2017-04-20 23:09:42.509 2e+03 1.40 s 5.8 Mb 61.44° 242.0° System-search
IU.ADK.00.BHZ 2017-04-20 23:10:49.029 3e+03 1.20 s 5.9 Mb 72.07° 358.0° System-search
GT.PLCA.00.BHZ 2017-04-20 23:12:10.799 1e+03 1.95 s 5.5 Mb 86.81° 132.0° System-search
IU.COLA.00.BHZ 2017-04-20 23:12:11.920 1e+03 1.00 s 5.7 Mb 87.47° 10.0° System-search
IU.LVC.00.BHZ 2017-04-20 23:12:52.250 729.5 1.90 s 5.7 Mb 95.68° 116.0° System-search
IU.TARA.00.BHZ 2017-04-20 23:13:42.799 6e+03 18.35 s 5.2 Ms 24.98° 328.6° System-search
II.TAU.00.BHZ 2017-04-20 23:21:36.880 6e+03 18.35 s 5.3 Ms 39.09° 226.2° System-search
IU.MIDW.00.BHZ 2017-04-20 23:26:21.005 3e+04 20.45 s 5.3 Ms 48.45° 356.5° System-search
IU.POHA.00.BHZ 2017-04-20 23:28:37.380 3e+03 19.00 s 5.1 Ms 44.00° 26.0° System-search
IU.NWAO.00.BHZ 2017-04-20 23:39:32.630 2e+03 18.30 s 5.1 Ms 61.43° 242.8° System-search
IU.ADK.00.BHZ 2017-04-20 23:39:42.480 1e+03 19.00 s 5.1 Ms 72.03° 358.5° System-search
IU.COR.00.BHZ 2017-04-20 23:42:13.529 9e+03 18.60 s 5.8 Ms 79.73° 34.5° System-search
IU.PAYG.00.BHZ 2017-04-20 23:42:49.230 3e+03 18.30 s 5.7 Ms 84.22° 88.7° System-search
GT.PLCA.00.BHZ 2017-04-20 23:46:52.704 7e+03 19.20 s 5.7 Ms 86.83° 132.4° System-search
CU.TGUH.00.BHZ 2017-04-20 23:47:02.454 849.5 19.00 s 5.3 Ms 92.16° 76.0° System-search
IU.COLA.00.BHZ 2017-04-20 23:47:36.329 2e+03 19.50 s 5.4 Ms 87.45° 11.0° System-search
IU.OTAV.00.BHZ 2017-04-20 23:48:00.279 2e+03 18.10 s 5.5 Ms 95.64° 92.0° System-search
IU.PET.00.BHZ 2017-04-20 23:49:47.980 2e+03 18.35 s 5.3 Ms 76.81° 343.6° System-search
CU.MTDJ.00.BHZ 2017-04-20 23:52:19.779 549.5 18.83 s 5.2 Ms 102.36° 75.2° System-search
II.FFC.00.BHZ 2017-04-20 23:52:34.529 3e+03 18.90 s 5.6 Ms 96.79° 33.9° System-search
II.AAK.00.BHZ 2017-04-21 00:03:42.630 970.5 19.20 s 5.6 Ms 118.93° 308.0° System-search
AE.UMQ.--.HHZ 2017-04-21 00:04:26.559 172.5 18.32 s 5.1 Ms 133.87° 285.9° System-search
IN.MNC.--.HHZ 2017-04-21 00:05:07.890 195.0 21.01 s 5.5 Ms 113.94° 270.0° System-search
DN.NAZ.--.HHZ 2017-04-21 00:05:09.980 62.0 21.80 s 4.7 Ms 133.83° 285.1° System-search
II.BRVK.00.BHZ 2017-04-21 00:09:03.029 1e+03 20.10 s 5.4 Ms 121.27° 320.2° System-search
IU.KBL.--.BHZ 2017-04-21 00:11:21.130 458.0 20.50 s 5.2 Ms 122.84° 298.3° System-search
OM.MDH.--.HHZ 2017-04-21 00:12:17.900 33.5 21.60 s 4.4 Ms 133.28° 285.6° System-search
II.KURK.00.BHZ 2017-04-21 00:13:07.079 1e+03 18.15 s 5.4 Ms 116.25° 317.2° System-search
OM.SOH.--.HHZ 2017-04-21 00:14:53.369 46.5 20.24 s 4.5 Ms 132.95° 284.1° System-search
OM.ASH.--.HHZ 2017-04-21 00:15:25.269 76.5 19.54 s 4.7 Ms 133.44° 284.8° System-search
AE.ALN.--.HHZ 2017-04-21 00:15:41.380 217.0 18.38 s 5.2 Ms 133.65° 283.9° System-search
DN.FAQ.--.HHZ 2017-04-21 00:15:46.730 76.0 19.92 s 5.4 Ms 133.87° 284.8° System-search
DN.ASU.--.HHZ 2017-04-21 00:16:02.589 113.5 19.31 s 5.6 Ms 134.09° 284.6° System-search
OM.BID.--.HHZ 2017-04-21 00:19:13.190 331.5 19.43 s 5.4 Ms 131.43° 283.5° System-search
OM.BAN.--.HHZ 2017-04-21 00:20:16.869 25.5 19.23 s 4.3 Ms 133.33° 286.5° System-search
IU.KEV.00.BHZ 2017-04-21 00:20:24.180 2e+03 18.90 s 5.5 Ms 129.00° 350.6° System-search
II.UOSS.10.BHZ 2017-04-21 00:20:48.404 219.0 19.27 s 4.6 Ms 133.33° 285.1° System-search
DN.HAT.--.HHZ 2017-04-21 00:20:49.359 64.0 18.57 s 4.7 Ms 133.39° 285.0° System-search
UE.UMZA.--.HHZ 2017-04-21 00:22:41.049 121.5 19.27 s 5.3 Ms 134.05° 281.9° System-search
AE.MSF.--.HHZ 2017-04-21 00:24:28.490 129.0 18.63 s 5.0 Ms 133.41° 285.7° System-search
UE.GHWR.--.HHZ 2017-04-21 00:25:04.859 183.5 18.05 s 5.5 Ms 136.27° 283.4° System-search
AE.SRB.--.HHZ 2017-04-21 00:26:46.299 218.0 18.82 s 5.3 Ms 135.13° 285.3° System-search
AE.MZR.--.HHZ 2017-04-21 00:32:20.670 439.5 18.03 s 5.5 Ms 135.62° 282.1° System-search
Channel Phase Time Time Residual Dir. Event Distance Event Azimuth Automatic? Defined By Action
IU.TARA.00.BHZ P 2017-04-20 23:04:51.460 0 s c 25.00° 328.0° yes Time System-search
II.TAU.00.BHZ P 2017-04-20 23:06:52.759 -0.20 s c 39.09° 226.0° yes Time System-search
IU.MIDW.00.BHZ P 2017-04-20 23:08:09.210 0.90 s 48.50° 356.0° no Time System-search
IU.NWAO.00.BHZ P 2017-04-20 23:09:42.509 0.10 s c 61.44° 242.0° yes Time System-search
IU.ADK.00.BHZ P 2017-04-20 23:10:49.029 -0.50 s 72.07° 358.0° no Time System-search
GT.PLCA.00.BHZ P 2017-04-20 23:12:10.799 0.10 s c 86.81° 132.0° yes Time System-search
IU.COLA.00.BHZ P 2017-04-20 23:12:11.920 -0.90 s 87.47° 10.0° no Time System-search
IU.LVC.00.BHZ P 2017-04-20 23:12:52.250 -0.30 s 95.68° 116.0° no Time System-search
IU.MAKZ.00.BHZ PKiKP 2017-04-20 23:18:04.349 -0.40 s 113.90° 313.0° no Time System-search
II.KURK.00.BHZ PKPdf 2017-04-20 23:18:07.900 -1.20 s 116.29° 317.0° no Time System-search
II.AAK.00.BHZ PKPdf 2017-04-20 23:18:14.130 -0.70 s 118.99° 308.0° no Time System-search
II.BRVK.00.BHZ PKPdf 2017-04-20 23:18:18.079 -0.70 s 121.29° 320.0° no Time System-search
IU.KBL.--.BHZ PKPdf 2017-04-20 23:18:22.720 0.10 s c 122.93° 298.0° yes Time System-search
OM.SOH.--.HHZ PKPdf 2017-04-20 23:18:42.119 0.20 s c 133.08° 284.0° yes Time System-search
AE.ALN.--.HHZ PKPdf 2017-04-20 23:18:43.750 0.50 s c 133.78° 284.0° yes Time System-search
AE.MZR.--.HHZ PKPdf 2017-04-20 23:18:46.910 0 s 135.75° 282.0° no Time System-search
IU.LSZ.00.BHZ PKPdf 2017-04-20 23:18:52.710 0.70 s c 138.09° 213.0° yes Time System-search
IU.KMBO.00.BHZ PKPdf 2017-04-20 23:18:56.710 -3.20 s c 142.39° 239.0° yes Time System-search
IU.GNI.00.BHZ PKPdf 2017-04-20 23:18:58.259 1.10 s c 141.37° 309.0° yes Time System-search
GO.AKH.--.HHZ PKPdf 2017-04-20 23:18:58.960 1.00 s c 141.82° 311.0° yes Time System-search
IU.ANTO.00.BHZ PKPdf 2017-04-20 23:19:13.660 2.20 s 149.77° 315.0° no Time System-search
GE.EIL.--.BHZ PKPdf 2017-04-20 23:19:17.640 2.60 s 152.06° 294.0° no Time System-search
II.BFO.00.BHZ PKPdf 2017-04-20 23:19:20.309 5.60 s c 151.98° 356.0° yes Time System-search
II.KIV.00.BHZ PP 2017-04-20 23:21:57.660 -1.60 s c 141.34° 315.0° yes Time System-search

Shake Maps

None

Ground Motion

None

Event 20170420-7

Time: 2017-04-20 22:59:25.680
Position:20.4364°S, 174.3741°W
Place:South Pacfic Ocean
Major Place:119 km NE of Nuku?alofa, Tonga
Depth:10.0 km
Magnitude:5.5 MT