Earthquake 20170512-1

2017-05-12 00:47:00.750 73.9 km 5.5 Mwb
27.6882°S, 177.1718°W
South Pacfic Ocean
753 km S of Nuku?alofa, Tonga
Time Error: 1.69 s Depth Error: 10.5 km
Num. Stations: 37 Time RMS: 0.83 s
Num. Phases: 37 Azimuth Gap: 66°
Analysis Type: Manual Max. Intensity (MMI):
Effects Type: Seismic
 

MANUALLY REVIEWED LOCATION

Magnitudes

Preferred Magnitude Stations Error Author Action
5.8 mb 10 0.20 NCMS System-search
4.6 Md 1 0.40 NCMS System-search
5.8 mb 0 0 NCMS System-search
5.5 M 0 0 NCMS System-search
Emblem-favorite 5.5 Mwb 16 0.10 NCMS System-search
5.6 Mwc 17 0.10 NCMS System-search
5.8 mB_BB 2 0.40 NCMS System-search
5.6 M 28 0.30 NCMS System-search
5.3 Ms_BB 1 0.50 NCMS System-search
5.5 Mwb 0 0 NCMS System-search

Origin Details

Ellipse Major:11.40 km Min. Distance:1.69° Fixed Depth:no
Ellipse Minor:8.90 km Max. Distance:152.42° Fixed Phase:no
Ellipse Strike:215.0° Fixed Location:no Fixed Time:no
Author:NCMS Location Method:Inversion Event Type:Earthquake
External Event ID:HYDRA_RED@16232 External Origin ID:HYDRA_RED@31731

Error Ellipse

Azimuth Dip Magnitude Action
Max 215° 20° 28.0 km System-search
Intermediate 305° 20.9 km System-search
Min 38° 69° 13.5 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 17 60% 0.070 2017-05-13 00:46:37.299
30.9955°S, 178.5543°W
85.0 km
4e+17 nt-m NP1
NP2
207.0
300.0
83.0
66.0
-25.0
-172.0
2.04e+16 1.52e+17 1.04e+17 -2.81e+17 -1.86e+17 2.61e+17 System-search
Ffffffff MT 16 82% 0.77 35.0 km 2e+17 nt-m NP1
NP2
272.0
142.0
47.0
56.0
50.0
124.0
1.81e+17 -2.15e+16 -1.13e+17 -1.66e+17 1.02e+17 -1.42e+16 System-search
Channel Time Amplitude Period/Duration Magnitude Event Distance Event Azimuth Action
IU.RAO.00.BHZ 2017-05-12 00:51:38.039 249.8 s 4.6 Md 1.69° 203.1° System-search
IU.POHA.00.BHZ 2017-05-12 00:56:00.910 165.4 1.00 s 6.0 mb 51.61° 26.3° System-search
II.RPN.00.BHZ 2017-05-12 00:56:57.410 368.6 1.50 s 6.3 mb 59.48° 106.7° System-search
II.KAPI.00.BHZ 2017-05-12 00:57:56.210 581.7 1.70 s 5.7 mB_BB 63.89° 278.3° System-search
II.KAPI.00.BHZ 2017-05-12 00:57:57.410 59.3 1.20 s 5.4 mb 63.89° 278.3° System-search
II.ERM.00.BHZ 2017-05-12 00:58:56.109 1e+03 2.20 s 6.0 mB_BB 78.44° 330.9° System-search
II.ERM.00.BHZ 2017-05-12 00:58:57.359 228.6 1.80 s 5.8 mb 78.44° 330.9° System-search
IU.PET.00.BHZ 2017-05-12 00:59:18.890 52.1 0.90 s 5.5 mb 83.09° 345.5° System-search
GT.PLCA.00.BHZ 2017-05-12 00:59:23.920 110.3 1.05 s 5.8 mb 83.82° 133.0° System-search
IU.PAYG.00.BHZ 2017-05-12 00:59:41.359 180.5 1.30 s 6.0 mb 86.93° 89.3° System-search
II.NNA.00.BHZ 2017-05-12 01:00:09.910 43.2 1.20 s 5.8 mb 93.45° 105.5° System-search
IU.LVC.00.BHZ 2017-05-12 01:00:16.309 76.8 1.40 s 5.9 mb 94.59° 118.5° System-search
IU.OTAV.00.BHZ 2017-05-12 01:00:31.859 19.5 1.60 s 5.4 mb 97.84° 94.0° System-search
II.BFO.00.BHZ 2017-05-12 02:53:13.447 144.4 7.30 s 5.3 Ms_BB 158.95° 349.6° System-search
Channel Phase Time Time Residual Dir. Event Distance Event Azimuth Automatic? Defined By Action
IU.RAO.00.BHZ Pn 2017-05-12 00:47:28.289 0 s 1.69° 203.1° yes Time System-search
II.MSVF.00.BHZ Pn 2017-05-12 00:49:34.859 1.80 s 10.83° 335.0° yes Time System-search
II.TAU.00.BHZ pP 2017-05-12 00:53:41.759 1.00 s 32.44° 232.7° yes Time System-search
IU.POHA.00.BHZ P 2017-05-12 00:56:00.059 0 s 51.61° 26.3° yes Time System-search
II.RPN.00.BHZ P 2017-05-12 00:56:55.109 -1.30 s 59.48° 106.7° yes Time System-search
II.KAPI.00.BHZ P 2017-05-12 00:57:26.160 0 s 63.89° 278.3° yes Time System-search
II.ERM.00.BHZ P 2017-05-12 00:58:55.160 1.80 s 78.44° 330.9° yes Time System-search
IU.PET.00.BHZ P 2017-05-12 00:59:17.839 0 s 83.09° 345.5° yes Time System-search
GT.PLCA.00.BHZ P 2017-05-12 00:59:22.619 0.30 s 83.82° 133.0° yes Time System-search
IU.PAYG.00.BHZ P 2017-05-12 00:59:40.059 1.90 s 86.93° 89.3° yes Time System-search
II.NNA.00.BHZ P 2017-05-12 01:00:08.509 -0.20 s 93.45° 105.5° yes Time System-search
IU.LVC.00.BHZ P 2017-05-12 01:00:15.210 1.00 s 94.59° 118.5° yes Time System-search
IU.OTAV.00.BHZ P 2017-05-12 01:00:30.460 1.20 s 97.84° 94.0° yes Time System-search
IU.MAKZ.00.BHZ PKPdf 2017-05-12 01:05:35.509 -1.00 s 116.78° 310.7° yes Time System-search
II.NIL.00.BHZ PKPdf 2017-05-12 01:05:42.859 -0.60 s 120.17° 294.4° yes Time System-search
II.AAK.00.BHZ PKPdf 2017-05-12 01:05:45.160 -0.10 s 121.18° 304.8° yes Time System-search
IU.KBL.--.BHZ PKPdf 2017-05-12 01:05:50.809 0.20 s 123.79° 294.4° yes Time System-search
OM.MDH.--.HHZ PKPpre 2017-05-12 01:05:59.990 4.00 s 132.40° 279.6° yes System-search
AE.MZR.--.HHZ PKPpre 2017-05-12 01:06:03.549 4.50 s 134.24° 275.6° yes System-search
OM.BID.--.HHZ PKPdf 2017-05-12 01:06:04.359 1.30 s 130.30° 278.0° yes Time System-search
IU.LSZ.00.BHZ PKPdf 2017-05-12 01:06:05.210 0.90 s 130.72° 212.9° yes Time System-search
II.UOSS.10.BHZ PKPdf 2017-05-12 01:06:05.460 -1.50 s 132.38° 279.1° yes Time System-search
OM.SOH.--.HHZ PKPdf 2017-05-12 01:06:05.470 -0.50 s 131.87° 278.2° yes Time System-search
IU.TSUM.10.BHZ PKPdf 2017-05-12 01:06:05.690 0.50 s 131.25° 198.6° yes Time System-search
DN.HAT.--.HHZ PKPdf 2017-05-12 01:06:06.019 -1.00 s 132.42° 278.9° yes Time System-search
OM.ASH.--.HHZ PKPdf 2017-05-12 01:06:07.109 0 s 132.44° 278.7° yes Time System-search
AE.ALN.--.HHZ PKPdf 2017-05-12 01:06:07.289 0 s 132.54° 277.8° yes Time System-search
AE.MSF.--.HHZ PKPdf 2017-05-12 01:06:07.369 0.10 s 132.54° 279.7° yes Time System-search
DN.NAZ.--.HHZ PKPdf 2017-05-12 01:06:07.759 -0.10 s 132.87° 279.0° yes Time System-search
AE.SHM.--.HHZ PKPdf 2017-05-12 01:06:07.809 0 s 132.83° 280.6° yes Time System-search
DN.FAQ.--.HHZ PKPdf 2017-05-12 01:06:08.910 1.00 s 132.87° 278.7° yes Time System-search
DN.ASU.--.HHZ PKPdf 2017-05-12 01:06:08.960 0.70 s 133.06° 278.4° yes Time System-search
AE.UMQ.--.HHZ PKPdf 2017-05-12 01:06:09.410 1.30 s 133.01° 279.7° yes Time System-search
AE.SRB.--.HHZ PKPdf 2017-05-12 01:06:10.279 0 s 134.18° 278.8° yes Time System-search
IU.KMBO.00.BHZ PKPdf 2017-05-12 01:06:13.910 -1.00 s 136.24° 234.5° yes Time System-search
II.OBN.00.BHZ PKPpre 2017-05-12 01:06:22.660 1.00 s 143.32° 327.5° yes System-search
IU.GNI.00.BHZ PKPdf 2017-05-12 01:06:24.759 -2.10 s 143.39° 300.4° yes Time System-search
GE.EIL.--.BHZ PKPdf 2017-05-12 01:06:40.490 -0.40 s 151.79° 281.1° yes Time System-search
IU.ANTO.00.BHZ PKPdf 2017-05-12 01:06:41.589 0 s 152.42° 303.3° yes Time System-search
II.ESK.00.BHZ PKPbc 2017-05-12 01:06:46.410 -0.60 s 152.05° 7.4° yes Time System-search

Shake Maps

None

Ground Motion

None

Event 20170512-1

Time: 2017-05-12 00:47:00.750
Position:27.6882°S, 177.1718°W
Place:South Pacfic Ocean
Major Place:753 km S of Nuku?alofa, Tonga
Depth:73.9 km
Magnitude:5.5 Mwb