Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Mwpd 7.6 on date 23-01-2018 and time 10:31:43 (Italy) in region United States [Sea]

A magnitude Mwpd 7.6 earthquake occured in region: United States [Sea], on

  • 23-01-2018 09:31:43 (UTC)
  • 23-01-2018 10:31:43 (UTC +01:00) Italian time
  • 23-01-2018 00:31:43 (UTC -09:00) local time in the region of the earthquake (America/Anchorage)

and geographic coordinates (lat, lon) 55.9060, -149.0490 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 inhabitants.

Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		mb 6.0
Mwp 7.5
Mwpd 7.6 		2018-01-23
09:31:43		 55.9055 -149.049 10 2018-01-23
09:45:52		 Sala Sismica INGV-Roma 53370001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-01-23 09:31:43
Latitude 55.9055
Longitude -149.0490
Depth (km) 10 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 53370001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 21052
Semi-minor axis of confidence ellipse (meter) 13958
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 19
Circular confidence region, given by single value of horizontal uncertainty (meter) 16994.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 45.6989
Number of associated phases, regardless of their use for origin computation 163
Number of defining phases 163
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.37412
Epicentral distance of station closest to the epicenter (degree) 2.69370
Epicentral distance of station farthest from the epicenter (degree) 68.74727
Number of stations at which the event was observed 145
Number of stations from which data was used for origin computation 145
Magnitudes information

Mwpd:7.6

Field Value
Value 7.6
Uncertainty 0.1
Num. used stations 107
Type of magnitude Mwpd
Reference to an origin 53370001
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2018-01-23 09:45:52

Mwp:7.5

Field Value
Value 7.5
Uncertainty 0.1
Num. used stations 109
Type of magnitude Mwp
Reference to an origin 53370001
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2018-01-23 09:45:52

mb:6.0

Field Value
Value 6.0
Uncertainty 0.1
Num. used stations 111
Type of magnitude mb
Reference to an origin 53370001
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2018-01-23 09:45:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.HLG.BHZ. 2018-01-23T09:42:45.10 10.0 negative automatic P 14 68.2984 2.22511 0.287527
IU.MAKZ.BHZ.00 2018-01-23T09:42:45.37 10.0 positive automatic P 325 68.7473 -0.404596 0
GE.VAL.BHZ. 2018-01-23T09:42:35.70 10.0 negative automatic P 26 66.9193 1.53672 0.310937
GE.DSB.BHZ. 2018-01-23T09:42:34.45 10.0 negative automatic P 23 66.6217 2.14569 0.314606
CU.SDDR.BHZ.00 2018-01-23T09:42:37.85 10.0 positive automatic P 89 67.5563 -0.448454 0.310373
G.HDC.BHZ.00 2018-01-23T09:42:37.25 10.0 positive automatic P 106 67.8074 -2.73395 0
GE.SLIT.BHZ. 2018-01-23T09:42:30.85 10.0 positive automatic P 5 66.2489 0.971364 0
GE.VSU.BHZ. 2018-01-23T09:42:25.91 10.0 positive automatic P 2 65.5797 0.332881 0.343604
IU.GUMO.BHZ.00 2018-01-23T09:42:23.35 10.0 positive automatic P 258 65.4477 -1.3925 0.274942
G.TAOE.BHZ.00 2018-01-23T09:42:22.24 10.0 positive automatic P 170 65.1793 -0.866719 0.340615
CU.MTDJ.BHZ.00 2018-01-23T09:42:19.48 10.0 positive automatic P 95 64.6679 -0.325836 0.160295
GE.BOAB.BHZ. 2018-01-23T09:42:19.45 10.0 positive automatic P 105 64.9252 -1.93739 0.335934
CU.GTBY.BHZ.00 2018-01-23T09:42:19.05 10.0 positive automatic P 92 64.6540 -0.512801 0.16038
IU.KONO.BHZ.00 2018-01-23T09:42:10.97 10.0 negative automatic P 12 63.2013 0.941001 0.366854
CU.TGUH.BHZ.00 2018-01-23T09:42:06.45 10.0 positive automatic P 106 62.7200 -0.535949 0.348493
IU.TARA.BHZ.00 2018-01-23T09:42:04.07 10.0 negative automatic P 224 62.5444 -1.54959 0.362826
GB.LRW.BHZ. 2018-01-23T09:41:58.78 10.0 negative automatic P 18 61.1964 2.21011 0.390722
IU.BBSR.BHZ.00 2018-01-23T09:41:53.05 10.0 negative automatic P 75 60.6593 0.142954 0.392655
JP.JNU.BHZ. 2018-01-23T09:41:33.60 10.0 positive automatic P 283 57.7578 0.702944 0.433762
IU.ULN.BHZ.00 2018-01-23T09:41:37.22 10.0 positive automatic P 310 58.4114 -0.441349 0.434425
II.KWJN.BHZ.00 2018-01-23T09:41:36.65 10.0 negative automatic P 233 57.6194 4.81596 0
JP.JTU.BHZ. 2018-01-23T09:41:32.15 10.0 negative automatic P 285 57.5039 1.12646 0.447872
IU.TEIG.BHZ.00 2018-01-23T09:41:27.25 10.0 positive automatic P 103 57.1006 -0.926687 0.423651
IU.INCN.BHZ.00 2018-01-23T09:41:26.27 10.0 negative automatic P 289 56.7780 0.383122 0.448105
II.LVZ.BHZ.00 2018-01-23T09:41:22.27 10.0 positive automatic P 358 56.1638 0.657487 0.436894
JP.JCJ.BHZ. 2018-01-23T09:41:21.50 10.0 positive automatic P 269 56.0849 0.537636 0.469305
JP.JMN.BHZ. 2018-01-23T09:41:18.50 10.0 positive automatic P 281 55.6553 0.543169 0.444167
IU.DWPF.BHZ.00 2018-01-23T09:41:10.17 10.0 positive automatic P 91 54.6550 -0.474823 0.317528
IU.XMAS.BHZ.00 2018-01-23T09:41:08.90 10.0 positive automatic P 190 54.2831 0.960344 0.48568
IU.KEV.BHZ.00 2018-01-23T09:41:08.67 10.0 positive automatic P 2 54.3032 0.575012 0.496928
II.BORG.BHZ.00 2018-01-23T09:41:00.27 10.0 negative automatic P 25 52.9370 2.1928 0.531294
JP.JSG.BHZ. 2018-01-23T09:40:57.75 10.0 positive automatic P 278 52.5722 2.36614 0
G.INU.BHZ.00 2018-01-23T09:40:55.96 10.0 negative automatic P 280 52.7150 -0.486049 0.476807
G.UNM.BHZ.00 2018-01-23T09:40:51.30 10.0 positive automatic P 114 52.0439 -0.531318 0.497552
CN.DRLN.BHZ. 2018-01-23T09:40:50.78 10.0 negative automatic P 56 51.8610 0.659249 0.536075
US.NHSC.BHZ.00 2018-01-23T09:40:48.30 10.0 positive automatic P 86 51.5668 0.420482 0.34683
US.CNNC.BHZ.00 2018-01-23T09:40:46.58 10.0 positive automatic P 82 51.2665 0.937982 0.4285
IU.MAJO.BHZ.00 2018-01-23T09:40:44.67 10.0 negative automatic P 280 51.1918 -0.472489 0.534336
MX.MOIG.BHZ. 2018-01-23T09:40:42.08 10.0 positive automatic P 116 50.7337 0.110092 0.541745
IU.HRV.BHZ.00 2018-01-23T09:40:34.92 10.0 positive automatic P 71 49.5286 2.4038 0.561476
US.CBN.BHZ.00 2018-01-23T09:40:33.05 10.0 negative automatic P 79 49.4072 1.47969 0.59097
US.GOGA.BHZ.00 2018-01-23T09:40:31.60 10.0 positive automatic P 88 49.4996 -0.680818 0.549184
US.BRAL.BHZ.00 2018-01-23T09:40:30.50 10.0 positive automatic P 93 49.1702 0.744554 0.587921
IU.WAKE.BHZ.00 2018-01-23T09:40:30.67 10.0 negative automatic P 240 49.2926 -0.0115406 0.517264
US.PKME.BHZ.00 2018-01-23T09:40:27.05 10.0 positive automatic P 67 48.8187 -0.0170988 0.593984
JP.JMM.BHZ. 2018-01-23T09:40:25.35 10.0 positive automatic P 279 48.8103 -1.65047 0.587058
US.BLA.BHZ.00 2018-01-23T09:40:24.55 10.0 positive automatic P 82 48.4313 0.376711 0.514007
US.LBNH.BHZ.00 2018-01-23T09:40:23.70 10.0 negative automatic P 70 48.1433 1.7955 0.598515
US.LRAL.BHZ.00 2018-01-23T09:40:18.38 10.0 positive automatic P 92 47.7962 -0.801388 0.570558
IU.SSPA.BHZ.00 2018-01-23T09:40:16.52 10.0 positive automatic P 77 47.4144 0.286622 0.590085
MX.ZAIG.BHZ. 2018-01-23T09:40:16.75 10.0 positive automatic P 115 47.4345 -0.0135515 0.596603
US.BINY.BHZ.00 2018-01-23T09:40:15.90 10.0 positive automatic P 74 47.3705 -0.0301671 0.611924
US.TZTN.BHZ.00 2018-01-23T09:40:14.33 10.0 positive automatic P 85 47.1663 0.00610248 0.615494
US.MCWV.BHZ.00 2018-01-23T09:40:13.18 10.0 positive automatic P 80 47.0191 0.0236268 0.564326
JP.JTM.BHZ. 2018-01-23T09:40:09.25 10.0 positive automatic P 282 46.6094 -0.670861 0.596856
US.VBMS.BHZ.00 2018-01-23T09:40:09.08 10.0 positive automatic P 95 46.4409 0.495409 0.58637
US.LONY.BHZ.00 2018-01-23T09:40:09.88 10.0 positive automatic P 71 46.4852 0.872996 0.627472
US.KVTX.BHZ.00 2018-01-23T09:40:06.85 10.0 positive automatic P 106 45.9952 1.78138 0.600421
US.ERPA.BHZ.00 2018-01-23T09:40:00.53 10.0 negative automatic P 77 45.2508 1.2919 0.657297
US.OXF.BHZ.00 2018-01-23T09:40:00.63 10.0 positive automatic P 92 45.3580 -0.674228 0.618112
IU.HKT.BHZ.00 2018-01-23T09:39:59.27 10.0 negative automatic P 102 45.2155 0.442484 0.620556
CN.GAC.BHZ. 2018-01-23T09:39:58.93 10.0 positive automatic P 70 45.2953 -0.621327 0.626305
IU.WVT.BHZ.00 2018-01-23T09:39:57.40 10.0 positive automatic P 89 45.0674 -0.357594 0.676951
GE.KBS.BHZ.00 2018-01-23T09:39:56.22 10.0 negative automatic P 5 44.6906 1.48735 0.659582
US.ACSO.BHZ.00 2018-01-23T09:39:55.98 10.0 negative automatic P 81 44.8876 -0.369102 0.656018
II.ERM.BHZ.00 2018-01-23T09:39:54.82 10.0 negative automatic P 282 44.6258 0.611914 0.660756
DK.NUUK.BHZ.00 2018-01-23T09:39:53.45 10.0 positive automatic P 38 44.4284 0.800311 0.634143
US.NATX.BHZ.00 2018-01-23T09:39:53.43 10.0 positive automatic P 99 44.4844 0.31719 0.647896
IU.WCI.BHZ.00 2018-01-23T09:39:52.32 10.0 positive automatic P 86 44.4346 -0.397273 0.581199
CN.SADO.BHZ. 2018-01-23T09:39:49.98 10.0 positive automatic P 74 43.9504 1.13704 0.649853
US.AAM.BHZ.00 2018-01-23T09:39:43.25 10.0 positive automatic P 80 43.1133 1.17128 0.317754
GE.SFJD.BHZ.00 2018-01-23T09:39:42.22 10.0 positive automatic P 34 43.0989 0.229132 0.688734
IU.SLBS.BHZ.00 2018-01-23T09:39:41.67 10.0 positive automatic P 122 43.0264 0.180268 0.603817
GE.SUMG.BHZ. 2018-01-23T09:39:41.65 10.0 positive automatic P 24 43.0212 -0.211273 0.690174
US.JCT.BHZ.00 2018-01-23T09:39:37.85 10.0 negative automatic P 106 42.6565 -0.593105 0.696948
MX.HPIG.BHZ. 2018-01-23T09:39:36.85 10.0 positive automatic P 115 42.4088 0.219442 0.669679
IU.JOHN.BHZ.00 2018-01-23T09:39:33.55 10.0 negative automatic P 210 42.1543 -0.70932 0.325999
DK.ILULI.BHZ. 2018-01-23T09:39:31.84 10.0 negative automatic P 32 41.6923 1.35402 0.715021
IU.YSS.BHZ.00 2018-01-23T09:39:30.50 10.0 negative automatic P 287 41.6341 0.47152 0.699466
IU.CCM.BHZ.00 2018-01-23T09:39:29.97 10.0 positive automatic P 90 41.7835 -1.29639 0.637419
US.HDIL.BHZ.00 2018-01-23T09:39:25.43 10.0 negative automatic P 86 41.1515 -0.64823 0.708392
US.GLMI.BHZ.00 2018-01-23T09:39:25.45 10.0 positive automatic P 78 40.9413 1.07674 0.33658
IU.YAK.BHZ.00 2018-01-23T09:39:11.67 10.0 positive automatic P 313 39.5281 -0.945076 0.738835
US.JFWS.BHZ.00 2018-01-23T09:39:08.73 10.0 positive automatic P 84 39.0546 0.0308658 0.774865
MX.SRIG.BHZ. 2018-01-23T09:39:06.89 10.0 positive automatic P 122 38.8460 -0.0066458 0.659758
CN.FRB.BHZ. 2018-01-23T09:39:02.48 10.0 positive automatic P 45 38.4070 -0.731434 0.769176
US.AMTX.BHZ.00 2018-01-23T09:39:02.05 10.0 negative automatic P 103 38.2734 -0.204089 0.771776
US.SCIA.BHZ.00 2018-01-23T09:39:00.98 10.0 positive automatic P 87 38.0548 0.687607 0.362437
MX.HSIG.BHZ. 2018-01-23T09:39:00.31 10.0 positive automatic P 119 38.0487 0.0876785 0.767134
US.KSU1.BHZ.00 2018-01-23T09:39:00.33 10.0 positive automatic P 94 38.0493 0.0831001 0.794851
US.CBKS.BHZ.00 2018-01-23T09:38:47.65 10.0 positive automatic P 97 36.5029 0.466495 0.770401
IU.POHA.BHZ.00 2018-01-23T09:38:47.62 10.0 positive automatic P 190 36.4730 0.465604 0.762403
IU.TIXI.BHZ.00 2018-01-23T09:38:41.12 10.0 positive automatic P 328 35.8772 -0.604723 0.828915
IU.ANMO.BHZ.00 2018-01-23T09:38:40.02 10.0 positive automatic P 108 35.6462 -0.0244582 0.795723
IU.TUC.BHZ.00 2018-01-23T09:38:38.67 10.0 positive automatic P 116 35.4499 0.470793 0.818138
US.EYMN.BHZ.00 2018-01-23T09:38:37.75 10.0 positive automatic P 78 35.2790 1.09548 0.812105
G.KIP.BHZ.00 2018-01-23T09:38:35.17 10.0 positive automatic P 195 35.1234 -0.0830825 0.77088
US.ECSD.BHZ.00 2018-01-23T09:38:33.45 10.0 positive automatic P 88 34.9722 -0.565296 0.857609
IU.MIDW.BHZ.00 2018-01-23T09:38:27.42 10.0 negative automatic P 228 34.2725 -0.466564 0.397767
DK.TULEG.BHZ. 2018-01-23T09:38:27.90 10.0 negative automatic P 24 34.1543 1.03867 0.398897
US.SDCO.BHZ.00 2018-01-23T09:38:26.78 10.0 positive automatic P 104 34.0838 0.0902775 0.865739
US.OGNE.BHZ.00 2018-01-23T09:38:24.00 10.0 positive automatic P 96 33.7588 0.403802 0.796629
US.MVCO.BHZ.00 2018-01-23T09:38:15.13 10.0 negative automatic P 107 32.8681 -0.893652 0.813665
US.AGMN.BHZ.00 2018-01-23T09:38:14.80 10.0 positive automatic P 81 32.6752 0.782889 0.928379
US.WUAZ.BHZ.00 2018-01-23T09:38:13.93 10.0 negative automatic P 113 32.6240 0.139839 0.896304
US.ISCO.BHZ.00 2018-01-23T09:38:13.55 10.0 positive automatic P 101 32.5607 0.120904 0.876766
IW.SMCO.BHZ.00 2018-01-23T09:38:10.40 10.0 positive automatic P 103 32.2532 -0.452715 0.82553
CN.ULM.BHZ. 2018-01-23T09:38:05.60 10.0 positive automatic P 77 31.6197 0.86187 0.91764
II.PFO.BHZ.00 2018-01-23T09:38:04.27 10.0 positive automatic P 121 31.5993 -0.466698 0.876345
IU.MA2.BHZ.00 2018-01-23T09:38:00.97 10.0 positive automatic P 302 31.2124 -0.189849 0.926364
IU.RSSD.BHZ.00 2018-01-23T09:37:55.62 10.0 positive automatic P 93 30.5704 -0.181562 0.9402
IU.PET.BHZ.00 2018-01-23T09:37:47.72 10.0 positive automatic P 287 29.8005 -0.934036 0.869565
US.TPNV.BHZ.00 2018-01-23T09:37:42.23 10.0 positive automatic P 117 29.0316 0.136036 0.952381
US.DUG.BHZ.00 2018-01-23T09:37:36.05 10.0 negative automatic P 108 28.3773 -0.194943 0.869565
US.BW06.BHZ.00 2018-01-23T09:37:35.45 10.0 negative automatic P 101 28.3706 -0.864077 0.963855
CI.PHL.BHZ. 2018-01-23T09:37:34.00 10.0 positive automatic P 125 28.1987 0.534125 0.824742
US.HWUT.BHZ.00 2018-01-23T09:37:33.80 10.0 positive automatic P 105 28.0561 0.354644 0.91954
US.DGMT.BHZ.00 2018-01-23T09:37:33.23 10.0 positive automatic P 86 27.9427 0.993147 0.987654
US.LAO.BHZ.00 2018-01-23T09:37:31.53 10.0 positive automatic P 91 27.7988 0.538822 0.869565
US.AHID.BHZ.00 2018-01-23T09:37:28.78 10.0 positive automatic P 102 27.5246 0.0571836 0.888889
US.RLMT.BHZ.00 2018-01-23T09:37:24.53 10.0 positive automatic P 97 27.0287 0.245586 0.941176
US.ELK.BHZ.00 2018-01-23T09:37:21.28 10.0 negative automatic P 110 26.6987 -0.0551783 0.941176
BK.SAO.BHZ.00 2018-01-23T09:37:20.22 10.0 positive automatic P 124 26.6695 -0.521307 0.784314
II.FFC.BHZ.00 2018-01-23T09:37:18.57 10.0 positive automatic P 73 26.2908 1.24342 0.869565
BK.CMB.BHZ.00 2018-01-23T09:37:15.40 10.0 negative automatic P 121 26.1486 -0.709249 0.963855
US.HLID.BHZ.00 2018-01-23T09:37:07.53 10.0 positive automatic P 105 25.1890 -0.0607406 0.909091
US.EGMT.BHZ.00 2018-01-23T09:37:05.63 10.0 positive automatic P 92 25.0697 -0.7513 0.888889
BK.MCCM.BHZ.00 2018-01-23T09:37:04.12 10.0 positive automatic P 124 24.8846 -0.389474 0.898876
US.WVOR.BHZ.00 2018-01-23T09:36:53.58 10.0 positive automatic P 112 23.7140 -0.485602 0.91954
US.MSO.BHZ.00 2018-01-23T09:36:50.13 10.0 positive automatic P 98 23.4067 -0.937097 0.97561
US.BMO.BHZ.00 2018-01-23T09:36:44.03 10.0 negative automatic P 106 22.7780 -0.385389 0.963855
UW.BRAN.BHZ. 2018-01-23T09:36:36.60 10.0 positive automatic P 103 22.1102 -0.699844 0.97561
BK.HUMO.BHZ.00 2018-01-23T09:36:29.70 10.0 positive automatic P 117 21.3864 0.250876 0.941176
US.NEW.BHZ.00 2018-01-23T09:36:23.70 10.0 negative automatic P 98 20.8243 0.282729 0.869565
US.HAWA.BHZ.00 2018-01-23T09:36:20.78 10.0 negative automatic P 105 20.5976 -0.116436 0.930233
IU.COR.BHZ.00 2018-01-23T09:36:13.22 10.0 positive automatic P 114 19.7929 1.12312 0.909091
US.NLWA.BHZ.00 2018-01-23T09:35:48.00 10.0 positive automatic P 108 17.6507 0.292472 0.952381
IU.ADK.BHZ.00 2018-01-23T09:35:31.32 10.0 positive automatic P 268 16.6514 -3.78795 0.43956
CN.INK.BHZ. 2018-01-23T09:35:01.08 10.0 positive automatic P 24 14.2777 -2.75887 0.792079
CN.BBB.BHZ. 2018-01-23T09:34:40.08 10.0 positive automatic P 98 12.7859 -3.394 0.43956
AT.AKUT.BHZ. 2018-01-23T09:33:59.16 10.0 positive automatic P 266 9.7232 -2.39792 0.892857
US.EGAK.BHZ.00 2018-01-23T09:33:58.85 10.0 positive automatic P 20 9.6758 -2.10597 0.930233
AT.CRAG.BHZ. 2018-01-23T09:33:46.82 10.0 positive automatic P 86 8.9683 -4.39868 0.970874
AT.SKAG.BHZ. 2018-01-23T09:33:38.10 10.0 negative automatic P 58 8.1304 -1.63529 0.970874
II.KDAK.BHZ.00 2018-01-23T09:32:20.95 10.0 positive automatic P 316 2.6937 -4.09838 0.963855
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download