Earthquake with magnitude of Mwp 6.3 on date 01-12-2020 and time 17:22:42 (Italy) in region Fox Islands, Aleutian Islands, United States [Sea: United States]

A magnitude Mwp 6.3 earthquake occured in region: Fox Islands, Aleutian Islands, United States [Sea: United States], on

  • 01-12-2020 16:22:42 (UTC)
  • 01-12-2020 17:22:42 (UTC +01:00) Italian time
  • 01-12-2020 06:22:42 (UTC -10:00) local time in the region of the earthquake (America/Adak)

and geographic coordinates (lat, lon) 52.798, -168.3 at 20 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.

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

These three maps show the results of the analysis using the software ShakeMap designed to provide the level of ground shaking experienced in a region using the data recorded by seismometers and strong motion instruments and seismological information regarding the attenuation of the wavefield with distance and the site characteristics. The Shakemaps are determined for research purposes to provide fast estimates of the level of ground shaking produced by the earthquake. The maps are calculated automatically and adjourned progressively as more data become available. See http://shakemap.rm.ingv.it/ for additional information.

The red star indicates the epicenter. The red triangles show the stations of the INGV Italian National Seismic Network and the blue triangles those of the Nationa Accelerometric Network of the Dipartimento della Protezione Civile.

Intensity Shakemap

Intensity Shakemap

This map shows the distribution of the istrumentally derived intensities. To this purpose, it is used a conversion relation between ground acceleration and velocity, and the Mercalli Modificata (MMI - Modified Mercalli Intensity) scale. In general, the Mercalli intensity scale relies on the effects that the ground shaking produces as reported by an observer.
Peak ground acceleration Shakemap

Peak ground acceleration Shakemap

This map shows This map shows the distribution of peak ground acceleration expressed as per cent of the acceleration of gravity (i.e., g = 9.81 m/s²).
Peak velocity Shakemap

Peak velocity Shakemap

This map shows the distribution of peak ground velocities expressed in cm/s.
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
mb 5.5
Mwp 6.3

Mwpd 6.4
2020-12-01
16:22:42
52.7977 -168.3 20 2020-12-01
16:37:45
Sala Sismica INGV-Roma 85129421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-01 16:22:42
Latitude 52.7977
Longitude -168.3000
Depth (km) 20 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 85129421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 18760
Semi-minor axis of confidence ellipse (meter) 3432
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 355
Circular confidence region, given by single value of horizontal uncertainty (meter) 15363.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 61.1894
Number of associated phases, regardless of their use for origin computation 124
Number of defining phases 124
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.69395
Epicentral distance of station closest to the epicenter (degree) 2.01293
Epicentral distance of station farthest from the epicenter (degree) 70.06361
Number of stations at which the event was observed 115
Number of stations from which data was used for origin computation 115
Magnitudes information

Mwpd:6.4

Field Value
Value 6.4
Uncertainty 0.1
Num. used stations 29
Type of magnitude Mwpd
Reference to an origin 85129421
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2020-12-01 16:37:45

Mwp:6.3

Field Value
Value 6.3
Uncertainty 0.1
Num. used stations 38
Type of magnitude Mwp
Reference to an origin 85129421
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2020-12-01 16:37:45

mb:5.5

Field Value
Value 5.5
Uncertainty 0.1
Num. used stations 92
Type of magnitude mb
Reference to an origin 85129421
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2020-12-01 16:37:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IU.DAV.BHZ.00 2020-12-01T16:33:49.60 10.0 positive automatic P 255 70.0636 -1.9878 0
IU.TEIG.BHZ.00 2020-12-01T16:33:40.20 10.0 positive automatic P 85 68.0551 1.10187 0.304201
IU.KONO.BHZ.00 2020-12-01T16:33:35.37 10.0 positive automatic P 1 67.5375 -0.492787 0.310602
IU.HNR.BHZ.00 2020-12-01T16:33:34.37 10.0 positive automatic P 214 67.8767 -3.60984 0.141415
GE.VSU.BHZ. 2020-12-01T16:33:37.45 10.0 negative automatic P 352 68.0703 -1.74749 0.296943
IU.DWPF.BHZ.00 2020-12-01T16:33:29.57 10.0 negative automatic P 74 66.1412 2.63295 0.309766
AU.MANU.BHZ.00 2020-12-01T16:33:24.45 10.0 negative automatic P 230 66.1808 -2.7597 0
AU.RABL.BHZ.00 2020-12-01T16:33:21.80 10.0 positive automatic P 224 65.9904 -4.21357 0
US.NHSC.BHZ.00 2020-12-01T16:33:09.63 10.0 positive automatic P 70 63.1475 2.23113 0.363252
CN.DRLN.BHZ. 2020-12-01T16:33:02.05 10.0 positive automatic P 44 62.3937 -0.35701 0.387059
US.GOGA.BHZ.00 2020-12-01T16:32:55.48 10.0 negative automatic P 72 61.0474 2.15446 0.391863
US.BRAL.BHZ.00 2020-12-01T16:32:52.98 10.0 positive automatic P 76 60.5943 2.75389 0.185962
US.BLA.BHZ.00 2020-12-01T16:32:45.75 10.0 positive automatic P 67 60.0297 -0.711633 0.396783
IU.ANMO.BHZ.00 2020-12-01T16:31:05.02 10.0 negative automatic P 87 46.3584 -1.0219 0.556793
US.LBNH.BHZ.00 2020-12-01T16:32:44.45 10.0 positive automatic P 56 59.4928 1.72849 0.423711
US.BINY.BHZ.00 2020-12-01T16:32:41.08 10.0 positive automatic P 60 58.8701 2.64705 0.403674
US.LRAL.BHZ.00 2020-12-01T16:32:41.88 10.0 positive automatic P 75 59.2719 0.721148 0.421861
US.TZTN.BHZ.00 2020-12-01T16:32:38.48 10.0 positive automatic P 69 58.7514 0.888363 0.217305
IU.SSPA.BHZ.00 2020-12-01T16:32:38.50 10.0 negative automatic P 62 58.9716 -0.601927 0.421208
US.MCWV.BHZ.00 2020-12-01T16:32:36.33 10.0 positive automatic P 64 58.6053 -0.226942 0.416693
US.VBMS.BHZ.00 2020-12-01T16:32:33.45 10.0 positive automatic P 78 57.795 2.61447 0.443532
US.LONY.BHZ.00 2020-12-01T16:32:30.28 10.0 positive automatic P 57 57.8861 -1.27207 0.447505
JP.YOJ.BHZ. 2020-12-01T16:32:30.85 10.0 positive automatic P 269 57.9989 -1.42517 0.402201
US.ERPA.BHZ.00 2020-12-01T16:32:26.28 10.0 positive automatic P 62 56.8085 2.35394 0.447649
CN.GAC.BHZ. 2020-12-01T16:32:23.95 10.0 negative automatic P 57 56.6784 0.994886 0.460274
IU.KEV.BHZ.00 2020-12-01T16:32:23.82 10.0 negative automatic P 354 56.9377 -0.982919 0.456359
US.ACSO.BHZ.00 2020-12-01T16:32:22.45 10.0 positive automatic P 66 56.4842 0.834882 0.422938
US.OXF.BHZ.00 2020-12-01T16:32:22.03 10.0 positive automatic P 75 56.8168 -1.91923 0.469358
IU.WVT.BHZ.00 2020-12-01T16:32:21.45 10.0 negative automatic P 73 56.597 -0.950891 0.412411
G.IVI.BHZ.00 2020-12-01T16:32:21.40 10.0 negative automatic P 30 56.504 -0.308865 0.452151
IU.HKT.BHZ.00 2020-12-01T16:32:20.22 10.0 negative automatic P 84 56.2421 0.454434 0.466901
US.NATX.BHZ.00 2020-12-01T16:32:18.50 10.0 positive automatic P 81 55.66 2.80071 0.449084
IU.WCI.BHZ.00 2020-12-01T16:32:18.42 10.0 positive automatic P 70 56.0152 0.166057 0.420327
CN.RES.BHZ. 2020-12-01T16:29:34.50 10.0 negative automatic P 26 35.5258 -2.02831 0.747118
DK.SCO.BHZ. 2020-12-01T16:32:05.65 10.0 negative automatic P 13 54.3624 -0.654987 0.495991
US.MIAR.BHZ.00 2020-12-01T16:32:04.95 10.0 positive automatic P 78 54.3438 -1.24257 0.408705
US.JCT.BHZ.00 2020-12-01T16:31:59.33 10.0 negative automatic P 86 53.4844 -0.650079 0.509881
IU.GUMO.BHZ.00 2020-12-01T16:31:58.92 10.0 negative automatic P 241 53.896 -3.99768 0.509411
JP.JOW.BHZ. 2020-12-01T16:31:56.60 10.0 positive automatic P 267 53.0626 -0.208244 0.238441
IU.TIXI.BHZ.00 2020-12-01T16:29:09.07 10.0 positive automatic P 329 32.5493 -1.62797 0.661593
US.HDIL.BHZ.00 2020-12-01T16:31:53.30 10.0 negative automatic P 70 52.7336 -1.08351 0.509774
MX.HPIG.BHZ. 2020-12-01T16:31:52.84 10.0 negative automatic P 94 52.5102 -0.156254 0.479821
GE.SFJD.BHZ.00 2020-12-01T16:31:43.87 10.0 positive automatic P 26 51.4322 -0.846455 0.506888
IU.ULN.BHZ.00 2020-12-01T16:31:40.77 10.0 positive automatic P 301 51.058 -1.3601 0.549263
US.WMOK.BHZ.00 2020-12-01T16:31:40.83 10.0 positive automatic P 81 51.1156 -1.54323 0.469981
II.TLY.BHZ.00 2020-12-01T16:31:35.92 10.0 positive automatic P 306 50.3828 -0.938356 0.560483
US.SCIA.BHZ.00 2020-12-01T16:31:33.45 10.0 positive automatic P 71 49.6197 2.43011 0.54724
GE.SUMG.BHZ. 2020-12-01T16:31:32.75 10.0 positive automatic P 17 49.9104 -0.983107 0.530507
US.KSU1.BHZ.00 2020-12-01T16:31:29.95 10.0 negative automatic P 76 49.4748 0.0321203 0.555895
US.AMTX.BHZ.00 2020-12-01T16:31:28.20 10.0 positive automatic P 83 49.2778 -0.332146 0.528732
US.MNTX.BHZ.00 2020-12-01T16:31:27.60 10.0 negative automatic P 89 49.2499 -0.615589 0.559577
GE.DAG.BHZ. 2020-12-01T16:31:24.36 10.0 negative automatic P 9 49.0042 -1.90843 0.557208
GE.KBS.BHZ.00 2020-12-01T16:31:22.02 10.0 positive automatic P 360 48.2746 1.35569 0.544397
JP.JSU.BHZ. 2020-12-01T16:31:20.70 10.0 positive automatic P 269 48.3737 -0.78289 0.594538
US.CBKS.BHZ.00 2020-12-01T16:31:19.70 10.0 positive automatic P 78 47.82 2.45065 0.151025
MX.HSIG.BHZ. 2020-12-01T16:31:16.63 10.0 positive automatic P 96 47.8041 -0.418996 0.54008
JP.JTU.BHZ. 2020-12-01T16:31:09.00 10.0 positive automatic P 273 46.921 -1.15161 0.286056
US.EYMN.BHZ.00 2020-12-01T16:31:09.10 10.0 negative automatic P 63 46.851 -0.576154 0.606573
IU.INCN.BHZ.00 2020-12-01T16:31:07.02 10.0 positive automatic P 278 46.6172 -0.750446 0.546991
IU.TUC.BHZ.00 2020-12-01T16:31:00.63 10.0 positive automatic P 93 45.556 -0.185614 0.636414
US.OGNE.BHZ.00 2020-12-01T16:30:55.55 10.0 positive automatic P 77 45.1044 -0.452346 0.595395
US.SDCO.BHZ.00 2020-12-01T16:30:55.35 10.0 negative automatic P 83 45.0764 -0.690444 0.637428
JP.JCJ.BHZ. 2020-12-01T16:30:53.00 10.0 positive automatic P 255 44.5792 1.33479 0.631522
JP.JMN.BHZ. 2020-12-01T16:30:52.95 10.0 positive automatic P 269 44.7571 -0.201356 0.64306
DK.KULLO.BHZ. 2020-12-01T16:30:52.48 10.0 positive automatic P 21 44.7619 -0.618564 0.217358
US.AGMN.BHZ.00 2020-12-01T16:30:48.60 10.0 negative automatic P 65 44.2685 -0.614599 0.675283
DK.NEEM.BHZ.10 2020-12-01T16:30:46.10 10.0 positive automatic P 16 44.1639 -2.64934 0.476346
US.ISCO.BHZ.00 2020-12-01T16:30:44.68 10.0 positive automatic P 81 43.695 -0.34432 0.618802
US.WUAZ.BHZ.00 2020-12-01T16:30:39.03 10.0 negative automatic P 90 43.0029 -0.20931 0.698824
JP.JHJ2.BHZ. 2020-12-01T16:30:27.50 10.0 positive automatic P 263 41.6045 -0.0836965 0.716671
JP.JSG.BHZ. 2020-12-01T16:30:27.40 10.0 positive automatic P 266 41.5099 0.585168 0.165798
G.INU.BHZ.00 2020-12-01T16:30:26.71 10.0 positive automatic P 268 41.7523 -2.09563 0.713882
JP.JGF.BHZ. 2020-12-01T16:30:25.10 10.0 positive automatic P 268 41.3856 -0.776701 0.658132
IU.MAJO.BHZ.00 2020-12-01T16:30:15.57 10.0 positive automatic P 268 40.2467 -0.883063 0.742541
US.DGMT.BHZ.00 2020-12-01T16:30:12.60 10.0 positive automatic P 70 39.5227 2.12277 0.73893
NN.PRN.HHZ. 2020-12-01T16:30:10.49 10.0 positive automatic P 91 39.534 -0.222692 0.705885
US.TPNV.BHZ.00 2020-12-01T16:30:10.88 10.0 positive automatic P 93 39.1081 3.69652 0.755594
US.BW06.BHZ.00 2020-12-01T16:30:09.98 10.0 negative automatic P 80 39.5395 -0.914752 0.774642
US.DUG.BHZ.00 2020-12-01T16:30:06.75 10.0 positive automatic P 86 39.1259 -0.55617 0.705455
US.HWUT.BHZ.00 2020-12-01T16:30:06.35 10.0 positive automatic P 83 39.0229 -0.15942 0.766252
US.AHID.BHZ.00 2020-12-01T16:30:03.43 10.0 positive automatic P 81 38.6198 0.276826 0.706827
US.RLMT.BHZ.00 2020-12-01T16:30:00.65 10.0 negative automatic P 77 38.3759 -0.471332 0.788323
US.LKWY.BHZ.00 2020-12-01T16:29:59.00 10.0 positive automatic P 79 38.0144 0.865323 0.795542
II.FFC.BHZ.00 2020-12-01T16:29:55.87 10.0 positive automatic P 60 37.7669 0.184608 0.738241
US.ELK.BHZ.00 2020-12-01T16:29:52.05 10.0 negative automatic P 87 37.3275 -0.238696 0.763365
US.BOZ.BHZ.00 2020-12-01T16:29:46.05 10.0 negative automatic P 78 36.7241 -1.00193 0.741208
US.EGMT.BHZ.00 2020-12-01T16:29:45.73 10.0 negative automatic P 73 36.565 0.117327 0.777953
BK.SAO.BHZ.00 2020-12-01T16:29:42.80 10.0 positive automatic P 97 36.0994 1.29204 0.795974
US.HLID.BHZ.00 2020-12-01T16:29:42.10 10.0 negative automatic P 83 36.1809 -0.347182 0.822752
BK.CMB.BHZ.00 2020-12-01T16:29:39.97 10.0 negative automatic P 95 35.907 0.046962 0.756277
JP.JTM.BHZ. 2020-12-01T16:29:37.90 10.0 positive automatic P 271 35.8354 -1.31065 0.382965
US.MSO.BHZ.00 2020-12-01T16:29:29.55 10.0 positive automatic P 77 34.7175 -0.231168 0.770117
IU.POHA.BHZ.00 2020-12-01T16:29:28.02 10.0 negative automatic P 158 34.4892 0.0874798 0.837401
US.WVOR.BHZ.00 2020-12-01T16:29:25.95 10.0 positive automatic P 87 34.2795 -0.0564775 0.861675
II.ERM.BHZ.00 2020-12-01T16:29:22.42 10.0 positive automatic P 271 33.8452 0.40736 0.891928
US.BMO.BHZ.00 2020-12-01T16:29:20.95 10.0 negative automatic P 83 33.7401 -0.340517 0.823841
IU.YAK.BHZ.00 2020-12-01T16:29:14.12 10.0 positive automatic P 311 33.2246 -2.49622 0.863106
US.NEW.BHZ.00 2020-12-01T16:29:06.68 10.0 negative automatic P 77 32.1435 -0.590512 0.906473
US.HAWA.BHZ.00 2020-12-01T16:29:02.43 10.0 negative automatic P 82 31.6119 -0.0956897 0.837988
IU.YSS.BHZ.00 2020-12-01T16:29:00.20 10.0 positive automatic P 279 31.437 -0.744133 0.900108
US.NLWA.BHZ.00 2020-12-01T16:28:40.38 10.0 positive automatic P 83 28.5336 5.0341 0.952381
IU.MA2.BHZ.00 2020-12-01T16:27:47.32 10.0 positive automatic P 303 23.3419 -0.827135 0.769231
US.WRAK.BHZ.00 2020-12-01T16:27:36.85 10.0 positive automatic sP 66 20.8847 8.10405 0
CN.INK.BHZ. 2020-12-01T16:27:36.03 10.0 negative automatic P 33 22.5297 -3.4869 0.963855
IU.PET.BHZ.00 2020-12-01T16:27:08.82 10.0 positive automatic P 284 19.7543 -0.79945 0.851064
IU.BILL.BHZ.00 2020-12-01T16:27:06.82 10.0 positive automatic P 331 19.4149 0.872543 0.888889
AT.SKAG.BHZ. 2020-12-01T16:27:05.46 10.0 positive automatic P 57 19.3051 0.744646 0.917431
IU.COLA.BHZ.00 2020-12-01T16:26:23.47 10.0 negative automatic P 33 15.9059 -0.192927 0.941176
AK.TNA.BHZ. 2020-12-01T16:25:44.51 10.0 positive automatic P 1 12.7632 3.19662 0.961538
AK.GAMB.BHZ. 2020-12-01T16:25:23.17 10.0 negative automatic P 352 11.1186 4.35467 0.909091
AT.SMY.BHZ. 2020-12-01T16:25:15.20 10.0 negative automatic P 277 10.6212 3.19118 0.925926
II.KDAK.BHZ.00 2020-12-01T16:25:04.07 10.0 negative automatic P 55 10.209 -2.31602 0.963855
IU.ADK.BHZ.00 2020-12-01T16:23:59.17 10.0 positive automatic P 263 5.2006 1.51471 0.952381
AK.ATKA.BHZ. 2020-12-01T16:23:37.35 10.0 positive automatic P 263 3.6384 1.18026 0.970874
AT.AKUT.BHZ. 2020-12-01T16:23:12.66 10.0 negative automatic P 47 2.0129 -1.15256 0.970874
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