Earthquake 20170923-9

2017-09-23 20:46:58.910 3.3 km 5.5 Mwp
7.0464°N, 125.8321°E
959 km W of Koror, Palau Islands
Time Error: 1.21 s Depth Error: 21.5 km
Num. Stations: 23 Time RMS: 0.59 s
Num. Phases: 23 Azimuth Gap: 91°
Analysis Type: Manual Max. Intensity (MMI):
Effects Type: Seismic
 

MANUALLY REVIEWED LOCATION

Magnitudes

Preferred Magnitude Stations Error Author Action
5.5 mb 22 0.10 NCMS System-search
Emblem-favorite 5.5 Mwp 10 0.10 NCMS System-search
5.8 mB_BB 21 0.10 NCMS System-search
5.6 Mwb 31 0.10 NCMS System-search
5.5 Mwp 0 0 NCMS System-search
5.5 M 0 0 NCMS System-search
5.5 M 89 0.10 NCMS System-search
5.5 Ms_BB 6 0.20 NCMS System-search

Origin Details

Ellipse Major:17.40 km Min. Distance:13.43° Fixed Depth:no
Ellipse Minor:9.80 km Max. Distance:88.73° Fixed Phase:no
Ellipse Strike:200.0° Fixed Location:no Fixed Time:no
Author:NCMS Location Method:Inversion Event Type:Suspected Earthquake
External Event ID:HYDRA_RED@18578 External Origin ID:HYDRA_RED@37162

Error Ellipse

Azimuth Dip Magnitude Action
Max 196° 35° 47.2 km System-search
Intermediate 81° 30° 25.3 km System-search
Min 322° 39° 18.8 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 31 97% 0.51 6.0 km 3e+17 nt-m NP1
NP2
46.0
139.0
85.0
58.0
148.0
6.0
3.02e+16 1.21e+17 9.24e+16 2.27e+17 -2.01e+16 -2.57e+17 System-search
Channel Time Amplitude Period/Duration Magnitude Event Distance Event Azimuth Action
II.KAPI.00.BHZ 2017-09-23 20:50:29.210 1e+04 7.30 s 5.7 Mwp 13.43° 207.0° System-search
II.KAPI.00.BHZ 2017-09-23 20:55:01.992 7e+03 20.85 s 5.2 Ms_BB 13.43° 207.0° System-search
IU.MAKZ.00.BHZ 2017-09-23 20:56:37.710 511.7 2.95 s 5.7 mB_BB 54.54° 324.3° System-search
IU.MAKZ.00.BHZ 2017-09-23 20:56:38.855 50.7 1.15 s 5.4 mb 54.54° 324.3° System-search
IU.MAKZ.00.BHZ 2017-09-23 20:56:47.934 3e+03 19.23 s 5.8 Mwp 54.54° 324.3° System-search
II.AAK.00.BHZ 2017-09-23 20:56:57.950 2e+03 8.95 s 5.6 Mwp 57.33° 316.8° System-search
II.KURK.00.BHZ 2017-09-23 20:57:01.160 108.4 1.10 s 5.8 mb 58.49° 326.8° System-search
IU.KBL.--.BHZ 2017-09-23 20:57:02.424 31.6 1.10 s 5.3 mb 58.83° 306.2° System-search
II.KURK.00.BHZ 2017-09-23 20:57:02.509 732.5 6.30 s 5.3 Mwp 58.49° 326.8° System-search
II.KURK.00.BHZ 2017-09-23 20:57:05.710 1e+03 1.80 s 6.1 mB_BB 58.49° 326.8° System-search
IU.KBL.--.BHZ 2017-09-23 20:57:07.650 530.8 8.45 s 5.2 Mwp 58.83° 306.2° System-search
II.MSVF.00.BHZ 2017-09-23 20:57:16.529 49.6 1.00 s 5.5 mb 57.14° 116.2° System-search
II.AAK.00.BHZ 2017-09-23 20:57:29.049 226.1 1.80 s 5.9 mb 57.33° 316.8° System-search
II.MSVF.00.BHZ 2017-09-23 20:57:34.079 1e+03 4.80 s 6.1 mB_BB 57.14° 116.2° System-search
II.AAK.00.BHZ 2017-09-23 20:57:39.009 1e+03 4.80 s 6.1 mB_BB 57.33° 316.8° System-search
II.BRVK.00.BHZ 2017-09-23 20:57:39.640 91.6 1.30 s 5.8 mb 64.15° 326.4° System-search
IU.KBL.--.BHZ 2017-09-23 20:57:45.000 434.9 3.50 s 5.7 mB_BB 58.83° 306.2° System-search
II.BRVK.00.BHZ 2017-09-23 20:57:48.940 1e+03 13.85 s 5.4 Mwp 64.15° 326.4° System-search
II.BRVK.00.BHZ 2017-09-23 20:57:56.009 558.0 1.30 s 5.9 mB_BB 64.15° 326.4° System-search
OM.BID.--.HHZ 2017-09-23 20:57:57.450 63.0 1.28 s 5.7 mb 66.80° 292.5° System-search
AE.SHM.--.HHZ 2017-09-23 20:58:08.680 12.4 0.76 s 5.2 mb 68.80° 295.2° System-search
OM.ASH.--.HHZ 2017-09-23 20:58:09.279 155.7 4.46 s 5.4 mB_BB 68.73° 293.7° System-search
AE.ALN.--.HHZ 2017-09-23 20:58:10.089 17.6 0.64 s 5.4 mb 68.99° 293.0° System-search
DN.HAT.--.HHZ 2017-09-23 20:58:11.220 129.0 4.68 s 5.3 mB_BB 68.67° 293.8° System-search
AE.SHM.--.HHZ 2017-09-23 20:58:11.640 318.2 3.66 s 5.7 mB_BB 68.80° 295.2° System-search
AE.MSF.--.HHZ 2017-09-23 20:58:19.539 13.1 0.84 s 5.2 mb 68.66° 294.4° System-search
DN.FAQ.--.HHZ 2017-09-23 20:58:23.130 116.6 1.76 s 5.8 mb 69.16° 293.7° System-search
DN.HAT.--.HHZ 2017-09-23 20:58:24.059 7.7 0.84 s 4.9 mb 68.67° 293.8° System-search
OM.ASH.--.HHZ 2017-09-23 20:58:24.259 5.5 0.80 s 4.8 mb 68.73° 293.7° System-search
AE.SHM.--.HHZ 2017-09-23 20:58:25.099 951.0 19.06 s 5.4 Mwp 68.80° 295.2° System-search
AE.MZR.--.HHZ 2017-09-23 20:58:27.720 942.2 3.06 s 6.1 mB_BB 71.06° 291.9° System-search
DN.ASU.--.HHZ 2017-09-23 20:58:28.400 889.2 4.14 s 6.1 mB_BB 69.39° 293.6° System-search
DN.ASU.--.HHZ 2017-09-23 20:58:28.500 235.1 1.90 s 6.1 mb 69.39° 293.6° System-search
II.UOSS.10.BHZ 2017-09-23 20:58:29.640 115.4 4.90 s 5.3 mB_BB 68.61° 294.0° System-search
OM.BID.--.HHZ 2017-09-23 20:58:31.319 530.6 2.12 s 5.9 mB_BB 66.80° 292.5° System-search
II.UOSS.10.BHZ 2017-09-23 20:58:32.194 8.9 1.25 s 4.8 mb 68.61° 294.0° System-search
DN.FAQ.--.HHZ 2017-09-23 20:58:39.099 590.4 4.68 s 5.9 mB_BB 69.16° 293.7° System-search
AE.MZR.--.HHZ 2017-09-23 20:58:39.440 88.3 1.22 s 5.8 mb 71.06° 291.9° System-search
AE.ALN.--.HHZ 2017-09-23 20:58:52.420 417.8 3.02 s 5.8 mB_BB 68.99° 293.0° System-search
IU.GNI.00.BHZ 2017-09-23 20:59:09.599 752.0 8.40 s 5.4 Mwp 78.69° 309.5° System-search
IU.GNI.00.BHZ 2017-09-23 20:59:10.150 738.4 1.90 s 5.9 mB_BB 78.69° 309.5° System-search
IU.GNI.00.BHZ 2017-09-23 20:59:10.599 198.6 1.80 s 5.9 mb 78.69° 309.5° System-search
GO.AKH.--.HHZ 2017-09-23 20:59:14.099 37.7 0.92 s 5.4 mb 79.64° 310.8° System-search
GO.AKH.--.HHZ 2017-09-23 20:59:17.049 559.4 3.58 s 5.7 mB_BB 79.64° 310.8° System-search
II.KIV.00.BHZ 2017-09-23 20:59:17.369 1e+03 4.30 s 5.9 mB_BB 80.22° 313.3° System-search
II.KIV.00.BHZ 2017-09-23 20:59:18.769 1e+03 8.60 s 5.6 Mwp 80.22° 313.3° System-search
AE.MZR.--.HHZ 2017-09-23 20:59:27.960 5e+04 67.67 s 6.8 Mwp 71.06° 291.9° System-search
IU.COLA.00.BHZ 2017-09-23 20:59:39.144 137.7 2.75 s 5.2 mB_BB 82.10° 25.5° System-search
IU.COLA.00.BHZ 2017-09-23 20:59:40.825 7.3 0.95 s 4.8 mb 82.10° 25.5° System-search
GE.EIL.--.BHZ 2017-09-23 20:59:53.789 57.6 1.20 s 5.7 mb 87.32° 299.4° System-search
II.KIV.00.BHZ 2017-09-23 20:59:55.670 90.6 1.10 s 5.7 mb 80.22° 313.3° System-search
GE.EIL.--.BHZ 2017-09-23 20:59:56.539 679.9 4.00 s 6.1 mB_BB 87.32° 299.4° System-search
IU.KMBO.00.BHZ 2017-09-23 21:00:11.119 299.3 3.90 s 5.7 mB_BB 88.73° 268.8° System-search
IU.KMBO.00.BHZ 2017-09-23 21:00:44.269 25.6 1.50 s 5.3 mb 88.73° 268.8° System-search
IU.MAKZ.00.BHZ 2017-09-23 21:20:31.431 1e+03 16.45 s 5.5 Ms_BB 54.54° 324.3° System-search
II.AAK.00.BHZ 2017-09-23 21:22:13.875 4e+03 22.00 s 6.0 Ms_BB 57.33° 316.8° System-search
II.KURK.00.BHZ 2017-09-23 21:24:52.977 987.1 15.45 s 5.4 Ms_BB 58.49° 326.8° System-search
II.BRVK.00.BHZ 2017-09-23 21:28:04.291 944.9 16.40 s 5.5 Ms_BB 64.15° 326.4° System-search
II.OBN.00.BHZ 2017-09-23 21:40:00.083 954.9 21.40 s 5.7 Ms_BB 83.85° 324.7° System-search
Channel Phase Time Time Residual Dir. Event Distance Event Azimuth Automatic? Defined By Action
IU.DAV.00.BHZ Sg 2017-09-23 20:47:25.849 18.80 s 0.25° 275.3° no System-search
II.KAPI.00.BHZ Pn 2017-09-23 20:50:21.069 10.50 s 13.43° 207.0° no Time System-search
IU.MAKZ.00.BHZ P 2017-09-23 20:56:28.480 0.20 s 54.54° 324.3° no Time System-search
II.MSVF.00.BHZ P 2017-09-23 20:56:47.430 0 s 57.14° 116.2° no Time System-search
II.AAK.00.BHZ P 2017-09-23 20:56:49.000 0.40 s 57.33° 316.8° no Time System-search
II.KURK.00.BHZ P 2017-09-23 20:56:56.210 -0.10 s 58.49° 326.8° yes Time System-search
IU.KBL.--.BHZ P 2017-09-23 20:56:59.200 -0.10 s 58.83° 306.2° no Time System-search
II.BRVK.00.BHZ P 2017-09-23 20:57:35.089 0.50 s 64.15° 326.4° no Time System-search
OM.BID.--.HHZ P 2017-09-23 20:57:52.400 0.10 s 66.80° 292.5° no Time System-search
AE.MSF.--.HHZ P 2017-09-23 20:58:04.160 0 s 68.66° 294.4° no Time System-search
II.UOSS.10.BHZ P 2017-09-23 20:58:04.170 0.40 s 68.61° 294.0° no Time System-search
DN.HAT.--.HHZ P 2017-09-23 20:58:04.519 0.40 s 68.67° 293.8° no Time System-search
OM.ASH.--.HHZ P 2017-09-23 20:58:04.559 0 s 68.73° 293.7° no Time System-search
AE.SHM.--.HHZ P 2017-09-23 20:58:04.900 0 s 68.80° 295.2° no Time System-search
AE.ALN.--.HHZ P 2017-09-23 20:58:06.359 0.20 s 68.99° 293.0° yes Time System-search
DN.FAQ.--.HHZ P 2017-09-23 20:58:06.559 -0.60 s 69.16° 293.7° no Time System-search
DN.ASU.--.HHZ P 2017-09-23 20:58:08.619 0 s 69.39° 293.6° no Time System-search
AE.MZR.--.HHZ P 2017-09-23 20:58:19.569 0.70 s 71.06° 291.9° no Time System-search
IU.GNI.00.BHZ P 2017-09-23 20:59:01.200 -1.80 s 78.69° 309.5° no Time System-search
GO.AKH.--.HHZ P 2017-09-23 20:59:07.680 -0.50 s 79.64° 310.8° no Time System-search
II.KIV.00.BHZ P 2017-09-23 20:59:10.170 -1.00 s 80.22° 313.3° no Time System-search
IU.COLA.00.BHZ P 2017-09-23 20:59:25.650 5.10 s 82.10° 25.5° no Time System-search
GE.EIL.--.BHZ P 2017-09-23 20:59:49.490 1.80 s 87.32° 299.4° yes Time System-search
IU.KMBO.00.BHZ P 2017-09-23 20:59:53.420 -1.60 s 88.73° 268.8° no Time System-search

Shake Maps

None

Ground Motion

Station PGA PGA Time PGV PGV Time PGD PGD Time RSA @ 0.3s RSA @ 1.0s RSA @ 3.0s Action
IU.DAV.00.BHZ 0.830732 cm/s2 2017-09-23 20:47:41.269 0.070677 cm/s 2017-09-23 20:47:44.694 0.045602 cm 2017-09-23 20:47:45.344 3.012652 cm/s2 3.000475 cm/s2 0.614161 cm/s2 System-search

Event 20170923-9

Time: 2017-09-23 20:46:58.910
Position:7.0464°N, 125.8321°E
Place:
Major Place:959 km W of Koror, Palau Islands
Depth:3.3 km
Magnitude:5.5 Mwp