Event 20210730-8
2021-07-30 03:52:18.730 UTC 24 km 5.6 mb
56.3923°N, 157.6401°W
North Pacific Ocean; 38 km from Kaluiak (historical), Alaska, United States
Time Error: 0.98 s Analysis Type: Manual
Time RMS: 0.48 s Num. Stations: 27
Depth Error: 12 km Num. Phases: 27
Reference Elevation: 0 km Max. Intensity (MMI):
Azimuth Gap: 86° Effects Type: Seismic
 
MANUALLY REVIEWED LOCATION
Magnitudes
Preferred Magnitude Stations Error Author Action
5.6 M 0 0 NCMS Action show
Emblem favorite 5.6 mb 0 0 NCMS Action show
5.6 Mwr 6 0.1 NEIC Action show
6.0 mB_BB 9 0.2 NEIC Action show
5.8 Mwb 10 0.1 NEIC Action show
5.6 Ms_BB 9 0.2 NEIC Action show
5.7 M 45 0.2 NEIC Action show
5.8 Mwp 6 0.1 NEIC Action show
5.6 mb 12 0.2 NEIC Action show
 
Origin Details
Ellipse Major: 10.70 km Seismic Moment:
Ellipse Minor: 8.50 km Corner Frequency:
Ellipse Strike: 172.0° Stress Drop:
Min. Distance: 3.09° Source Radius:
Max. Distance: 142.70° Location Method: Inversion
Fixed Location: no Author: NEIC
Fixed Depth: no Event Type: Earthquake
Fixed Phase: no External Event ID: HYDRA_RED@71979
Fixed Time: no External Origin ID: HYDRA_RED@135726
 
Error Ellipse
Length Azimuth Dip Action
Maximum 25.70 km 168.00° 17.00° Action show
Intermediate 20.70 km 70.00° 24.00° Action show
Minimum 15.90 km 290.00° 58.00° Action show
 
Magnitude Moment Tensors
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 RMT 6 68% 0.64 48 km 3.5e+17 nt-m NP1
NP2
342.0
73.0
17.0
90.0
-1.0
-107.0
2.080e+16 -3.210e+17 -7.340e+16 8.050e+16 -5.720e+16 -1.010e+17 Action show
Ffffffff MT 10 29% 0.69 15 km 6.1e+17 nt-m NP1
NP2
210.0
311.0
63.0
70.0
-23.0
-152.0
-5.010e+16 4.400e+17 4.730e+16 -3.800e+17 -1.260e+17 4.300e+17 Action show
Channel Time Amplitude Period/Duration Magnitude Event Distance Event Azimuth Action
IU.COLA.00.BHZ 2021-07-30 03:55:20.704 UTC 6.2e+04 39.33 s 6.2 Mwp 9.76° 25.3° Action show
IU.COR.00.BHZ 2021-07-30 03:57:39.109 UTC 745.9 1.95 s 5.4 mB_BB 24.56° 104.1° Action show
IU.COR.00.BHZ 2021-07-30 03:57:39.535 UTC 66.7 1.25 s 5.1 mb 24.56° 104.1° Action show
IU.PET.00.BHZ 2021-07-30 03:57:42.210 UTC 6607.9 1.30 s 6.4 mB_BB 25.15° 280.9° Action show
IU.PET.00.BHZ 2021-07-30 03:57:42.710 UTC 638.0 1.00 s 6.2 mb 25.15° 280.9° Action show
IU.PET.00.BHZ 2021-07-30 03:57:43.759 UTC 4763.4 2.25 s 5.6 Mwp 25.15° 280.9° Action show
II.FFC.00.BHZ 2021-07-30 03:58:39.410 UTC 19.6 1.10 s 4.8 mb 30.80° 69.3° Action show
IU.COLA.00.BHZ 2021-07-30 03:58:54.513 UTC 3.2e+04 11.88 s 5.7 Ms_BB 9.76° 25.3° Action show
IU.ADK.00.BHZ 2021-07-30 04:01:47.447 UTC 2052.9 14.02 s 4.6 Ms_BB 12.03° 256.0° Action show
IU.MAKZ.00.BHZ 2021-07-30 04:03:03.234 UTC 658.4 3.50 s 5.9 mB_BB 65.74° 319.5° Action show
IU.MAKZ.00.BHZ 2021-07-30 04:03:03.585 UTC 40.4 1.10 s 5.5 mb 65.74° 319.5° Action show
IU.MAKZ.00.BHZ 2021-07-30 04:03:20.484 UTC 3219.4 18.33 s 5.8 Mwp 65.74° 319.5° Action show
II.AAK.00.BHZ 2021-07-30 04:03:43.059 UTC 1775.0 1.00 s 6.3 mB_BB 72.00° 322.3° Action show
II.AAK.00.BHZ 2021-07-30 04:03:43.509 UTC 148.1 0.80 s 6.1 mb 72.00° 322.3° Action show
IU.KIEV.00.BHZ 2021-07-30 04:03:48.259 UTC 4452.4 1.20 s 6.7 mB_BB 73.12° 355.5° Action show
IU.KIEV.00.BHZ 2021-07-30 04:03:48.710 UTC 346.9 0.90 s 6.4 mb 73.12° 355.5° Action show
IU.KIEV.00.BHZ 2021-07-30 04:03:57.710 UTC 9467.7 10.35 s 6.2 Mwp 73.12° 355.5° Action show
II.MSVF.00.BHZ 2021-07-30 04:04:11.009 UTC 25.1 1.00 s 5.2 mb 76.63° 203.8° Action show
II.KIV.00.BHZ 2021-07-30 04:04:20.410 UTC 1999.0 3.30 s 6.3 mB_BB 78.56° 345.2° Action show
II.KIV.00.BHZ 2021-07-30 04:04:20.809 UTC 183.7 0.90 s 6.1 mb 78.56° 345.2° Action show
II.KIV.00.BHZ 2021-07-30 04:04:29.210 UTC 6135.5 10.10 s 6.1 Mwp 78.56° 345.2° Action show
IU.KBL.--.BHZ 2021-07-30 04:04:32.369 UTC 563.1 0.95 s 5.8 mB_BB 81.13° 322.7° Action show
IU.KBL.--.BHZ 2021-07-30 04:04:32.819 UTC 54.9 0.90 s 5.6 mb 81.13° 322.7° Action show
IU.PAB.00.BHZ 2021-07-30 04:04:36.809 UTC 614.4 3.30 s 5.8 mB_BB 81.78° 20.5° Action show
IU.PAB.00.BHZ 2021-07-30 04:04:37.160 UTC 56.0 1.20 s 5.5 mb 81.78° 20.5° Action show
IU.GNI.00.BHZ 2021-07-30 04:04:39.809 UTC 794.7 1.90 s 5.9 mB_BB 81.97° 342.9° Action show
IU.GNI.00.BHZ 2021-07-30 04:04:41.660 UTC 1453.5 2.80 s 5.6 Mwp 81.97° 342.9° Action show
IU.GNI.00.BHZ 2021-07-30 04:05:24.109 UTC 63.2 1.10 s 5.6 mb 81.97° 342.9° Action show
GE.EIL.--.BHZ 2021-07-30 04:05:34.089 UTC 17.0 1.50 s 5.3 mb 93.61° 349.1° Action show
II.FFC.00.BHZ 2021-07-30 04:10:47.075 UTC 1927.3 18.40 s 5.3 Ms_BB 30.80° 69.3° Action show
IU.MAKZ.00.BHZ 2021-07-30 04:34:10.336 UTC 1143.7 18.35 s 5.6 Ms_BB 65.74° 319.5° Action show
II.AAK.00.BHZ 2021-07-30 04:38:44.904 UTC 8098.0 17.35 s 6.5 Ms_BB 72.00° 322.3° Action show
IU.KIEV.00.BHZ 2021-07-30 04:43:13.311 UTC 2814.8 17.95 s 6.1 Ms_BB 73.12° 355.5° Action show
II.KIV.00.BHZ 2021-07-30 04:46:17.917 UTC 1325.9 17.25 s 5.8 Ms_BB 78.56° 345.2° Action show
IU.GNI.00.BHZ 2021-07-30 04:47:19.629 UTC 825.5 19.25 s 5.6 Ms_BB 81.97° 342.9° Action show
IU.KBL.--.BHZ 2021-07-30 04:47:48.746 UTC 607.9 18.15 s 5.4 Ms_BB 81.13° 322.7° Action show
Channel Phase Time Time Residual Direction Event Distance Event Azimuth Automatic? Defined By Action
II.KDAK.00.BHZ Pn 2021-07-30 03:53:05.539 UTC -0.40 s _ 3.09° 61.1° yes Time Action show
IU.COLA.00.BHZ Pn 2021-07-30 03:54:41.380 UTC 4.10 s _ 9.76° 25.3° no Time Action show
IU.ADK.00.BHZ Pn 2021-07-30 03:55:05.609 UTC -2.90 s _ 12.03° 256.0° yes Time Action show
IU.COR.00.BHZ P 2021-07-30 03:57:36.309 UTC 0 s _ 24.56° 104.1° yes Time Action show
IU.PET.00.BHZ P 2021-07-30 03:57:41.509 UTC -0.10 s _ 25.15° 280.9° yes Time Action show
II.FFC.00.BHZ P 2021-07-30 03:58:28.660 UTC -3.50 s _ 30.80° 69.3° yes Time Action show
IU.MAKZ.00.BHZ P 2021-07-30 04:03:02.160 UTC 1.00 s _ 65.74° 319.5° yes Time Action show
II.AAK.00.BHZ P 2021-07-30 04:03:42.410 UTC 2.20 s _ 72.00° 322.3° yes Time Action show
IU.KIEV.00.BHZ P 2021-07-30 04:03:47.359 UTC 0.80 s _ 73.12° 355.5° yes Time Action show
II.MSVF.00.BHZ P 2021-07-30 04:04:07.359 UTC 0.20 s _ 76.63° 203.8° yes Time Action show
II.KIV.00.BHZ P 2021-07-30 04:04:19.109 UTC 1.20 s _ 78.56° 345.2° yes Time Action show
IU.KBL.--.BHZ P 2021-07-30 04:04:31.720 UTC -0.40 s _ 81.13° 322.7° yes Time Action show
IU.PAB.00.BHZ P 2021-07-30 04:04:35.309 UTC 0 s _ 81.78° 20.5° yes Time Action show
IU.GNI.00.BHZ P 2021-07-30 04:04:38.859 UTC 2.50 s _ 81.97° 342.9° yes Time Action show
IU.ANTO.00.BHZ P 2021-07-30 04:04:46.940 UTC 1.70 s _ 83.70° 352.0° yes Time Action show
KW.RDF.00.HHZ P 2021-07-30 04:05:27.529 UTC -1.30 s _ 92.77° 338.2° yes Time Action show
AE.SHM.--.HHZ P 2021-07-30 04:05:29.799 UTC 0 s _ 92.97° 330.1° yes Time Action show
AE.KHT.--.HHZ P 2021-07-30 04:05:31.509 UTC -0.10 s _ 93.35° 330.0° yes Time Action show
GE.EIL.--.BHZ P 2021-07-30 04:05:32.689 UTC 0 s _ 93.61° 349.1° yes Time Action show
DN.NAZ.--.HHZ P 2021-07-30 04:05:35.009 UTC -0.30 s _ 94.16° 330.1° yes Time Action show
DN.ASU.--.HHZ P 2021-07-30 04:05:37.059 UTC -0.30 s _ 94.60° 330.3° no Time Action show
AE.ALN.--.HHZ P 2021-07-30 04:05:39.029 UTC -0.30 s _ 95.02° 329.8° yes Time Action show
UE.UMZA.--.HHZ P 2021-07-30 04:05:45.529 UTC -0.30 s _ 96.46° 329.9° no Time Action show
AE.MZR.--.HHZ P 2021-07-30 04:05:46.670 UTC 0 s _ 96.65° 331.4° no Time Action show
AE.MKZ.--.HHZ P 2021-07-30 04:05:47.910 UTC -0.10 s _ 96.93° 332.2° yes Time Action show
II.RAYN.00.BHZ P 2021-07-30 04:05:53.089 UTC 0.10 s _ 98.02° 338.7° yes Time Action show
GT.PLCA.00.BHZ PKPdf 2021-07-30 04:11:09.769 UTC 0.90 s _ 121.25° 117.1° yes Time Action show
IU.TSUM.10.BHZ PKPpre 2021-07-30 04:11:44.039 UTC -0.60 s _ 142.70° 7.4° yes Action show

Ground Motion

No ground motions for this event.