Earthquake with magnitude of Mwp 6.2 on date 24-09-2021 and time 13:52:31 (Italy) in region Andreanof Islands, Aleutian Islands, United States [Sea: United States]

A magnitude Mwp 6.2 earthquake occured in region: Andreanof Islands, Aleutian Islands, United States [Sea: United States], on

  • 24-09-2021 11:52:31 (UTC)
  • 24-09-2021 13:52:31 (UTC +02:00) Italian time
  • 24-09-2021 02:52:31 (UTC -09:00) local time in the region of the earthquake (America/Adak)

and geographic coordinates (lat, lon) 51.194, -179 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 6.2

Mwpd 6.3
2021-09-24
11:52:31
51.1945 -179 20 2021-09-24
12:09:40
Sala Sismica INGV-Roma 95829421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-24 11:52:31
Latitude 51.1945
Longitude -179.0000
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 95829421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 18907
Semi-minor axis of confidence ellipse (meter) 3878
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 354
Circular confidence region, given by single value of horizontal uncertainty (meter) 15570.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124.255
Number of associated phases, regardless of their use for origin computation 151
Number of defining phases 151
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.12526
Epicentral distance of station closest to the epicenter (degree) 1.59615
Epicentral distance of station farthest from the epicenter (degree) 82.83475
Number of stations at which the event was observed 133
Number of stations from which data was used for origin computation 133
Magnitudes information

Mwp:6.2

Field Value
Value 6.2
Uncertainty 0.1
Num. used stations 80
Type of magnitude Mwp
Reference to an origin 95829421
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-09-24 12:09:40

Mwpd:6.3

Field Value
Value 6.3
Uncertainty 0.1
Num. used stations 73
Type of magnitude Mwpd
Reference to an origin 95829421
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-09-24 12:09:40

mb:5.5

Field Value
Value 5.5
Uncertainty 0.1
Num. used stations 93
Type of magnitude mb
Reference to an origin 95829421
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-09-24 12:09:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
CU.MTDJ.BHZ.00 2021-09-24T12:04:51.60 10.0 positive automatic P 70 82.792 -0.673172 0.113441
IV.SALO.BHZ. 2021-09-24T12:04:52.30 10.0 positive automatic P 353 82.8347 -0.144809 0
HU.KOVH.BHZ. 2021-09-24T12:04:45.65 10.0 positive automatic P 348 81.6023 -0.288877 0.160355
GE.JAGI.BHZ. 2021-09-24T12:04:46.32 10.0 positive automatic P 247 82.589 -4.76807 0
MN.BZS.BHZ. 2021-09-24T12:04:45.82 10.0 negative automatic P 346 81.5566 0.129118 0
IU.GNI.BHZ.00 2021-09-24T12:04:43.32 10.0 positive automatic P 328 81 0.355249 0.0765137
G.ECH.BHZ.00 2021-09-24T12:04:39.60 10.0 negative automatic P 356 80.4456 -0.222185 0.16688
CU.TGUH.BHZ.00 2021-09-24T12:04:38.83 10.0 positive automatic P 80 80.1533 0.473554 0.153464
GE.STU.BHZ. 2021-09-24T12:04:36.75 10.0 positive automatic P 355 79.7846 0.529824 0.168957
HU.LTVH.BHZ. 2021-09-24T12:04:37.51 10.0 positive automatic P 346 79.7956 1.27172 0
GE.PSZ.BHZ. 2021-09-24T12:04:35.45 10.0 positive automatic P 347 79.5681 0.302605 0.167104
GE.WLF.BHZ. 2021-09-24T12:04:32.90 10.0 positive automatic P 357 79.0417 0.743679 0.175678
IU.GRFO.BHZ.00 2021-09-24T12:04:31.30 10.0 positive automatic P 353 78.7355 0.806978 0.182637
GE.MORC.BHZ. 2021-09-24T12:04:27.05 10.0 positive automatic P 349 78.0461 0.307971 0.18919
GE.SOEI.BHZ. 2021-09-24T12:04:23.82 10.0 positive automatic P 237 78.0646 -3.07878 0
PL.KSP.BHZ. 2021-09-24T12:04:21.63 10.0 positive automatic P 350 77.137 0.0294351 0.189207
IU.CTAO.BHZ.00 2021-09-24T12:04:21.12 10.0 positive automatic P 213 77.525 -2.65772 0.179602
GB.MCH1.BHZ. 2021-09-24T12:04:19.90 10.0 positive automatic P 3 76.7495 0.499027 0.192004
GE.IBBN.BHZ. 2021-09-24T12:04:17.90 10.0 positive automatic P 356 76.3388 0.837918 0.205916
GE.FLT1.BHZ. 2021-09-24T12:04:15.50 10.0 negative automatic P 354 76.1119 -0.261641 0.208192
GE.DSB.BHZ. 2021-09-24T12:04:12.05 10.0 positive automatic P 5 75.3733 0.488047 0.215689
IU.KIEV.BHZ.00 2021-09-24T12:04:10.47 10.0 positive automatic P 342 75.3224 -0.78807 0.221358
IU.TEIG.BHZ.00 2021-09-24T12:04:07.00 10.0 positive automatic P 76 74.8086 -0.278043 0.186763
IU.DWPF.BHZ.00 2021-09-24T12:03:57.70 10.0 positive automatic P 66 72.8766 0.741574 0.250757
II.SIMI.BHZ.00 2021-09-24T12:03:53.35 10.0 positive automatic P 311 72.3317 -0.362031 0.253858
IO.EVN.BHZ. 2021-09-24T12:03:47.00 10.0 positive automatic P 291 71.0358 0.231869 0.262386
GE.LUWI.BHZ. 2021-09-24T12:03:46.07 10.0 positive automatic P 244 71.5908 -3.19325 0.234354
IU.CHTO.BHZ.00 2021-09-24T12:03:41.62 10.0 positive automatic P 276 70.5274 -1.26612 0.27785
GE.SANI.BHZ. 2021-09-24T12:03:40.27 10.0 positive automatic P 240 70.6527 -3.31274 0.249335
GE.SLIT.BHZ. 2021-09-24T12:03:37.95 10.0 positive automatic P 348 69.7816 -0.299786 0.270451
MY.LDM.BHZ. 2021-09-24T12:03:33.27 10.0 positive automatic P 251 68.9891 -0.099539 0.273296
IU.KONO.BHZ.00 2021-09-24T12:03:33.12 10.0 positive automatic P 355 68.935 0.0793491 0.216242
II.MSVF.BHZ.00 2021-09-24T12:03:32.32 10.0 negative automatic P 183 68.9848 -1.13014 0
GE.FAKI.BHZ. 2021-09-24T12:03:25.72 10.0 positive automatic P 234 68.0983 -2.0796 0.303669
US.GOGA.BHZ.00 2021-09-24T12:03:24.55 10.0 positive automatic P 64 67.7462 -1.02787 0.275245
MX.MOIG.BHZ. 2021-09-24T12:03:22.44 10.0 positive automatic P 87 67.2288 -0.197785 0
IU.HRV.BHZ.00 2021-09-24T12:03:21.57 10.0 positive automatic P 50 67.1631 -0.338782 0.300943
II.AAK.BHZ.00 2021-09-24T12:03:18.97 10.0 positive automatic P 310 66.6144 0.30971 0.30754
US.BLA.BHZ.00 2021-09-24T12:03:18.55 10.0 negative automatic P 59 66.6178 0.040383 0.318351
IM.TKL.BHZ. 2021-09-24T12:03:13.52 10.0 positive automatic P 62 65.9244 -0.496566 0.327087
US.LBNH.BHZ.00 2021-09-24T12:03:11.75 10.0 positive automatic P 49 65.6757 -0.664236 0.308473
RM.SLV.BHZ. 2021-09-24T12:03:11.67 10.0 positive automatic P 274 65.554 -0.00620157 0.216946
IU.SSPA.BHZ.00 2021-09-24T12:03:10.12 10.0 positive automatic P 55 65.4246 -0.653659 0.34149
US.TZTN.BHZ.00 2021-09-24T12:03:10.53 10.0 positive automatic P 62 65.4033 -0.131198 0.34177
US.BINY.BHZ.00 2021-09-24T12:03:08.98 10.0 positive automatic P 53 65.2316 -0.592762 0.33993
US.VBMS.BHZ.00 2021-09-24T12:03:04.90 10.0 positive automatic P 69 64.5606 -0.212423 0.259221
US.LONY.BHZ.00 2021-09-24T12:03:00.85 10.0 positive automatic P 50 64.129 -1.51016 0.354422
US.OXF.BHZ.00 2021-09-24T12:02:58.03 10.0 positive automatic P 67 63.5607 -0.538211 0.353591
IU.WVT.BHZ.00 2021-09-24T12:02:56.47 10.0 positive automatic P 65 63.3089 -0.434513 0.3698
IU.HKT.BHZ.00 2021-09-24T12:02:55.12 10.0 positive automatic P 75 63.0073 0.315122 0.319957
US.ACSO.BHZ.00 2021-09-24T12:02:54.55 10.0 positive automatic P 58 63.0505 -0.664145 0.329646
II.ARTI.BHZ.00 2021-09-24T12:02:51.22 10.0 positive automatic P 328 62.4806 -0.202037 0.376652
DK.NRS.BHZ. 2021-09-24T12:02:46.60 10.0 positive automatic P 23 61.6884 0.537878 0.378562
US.MIAR.BHZ.00 2021-09-24T12:02:41.75 10.0 positive automatic P 70 61.1105 -0.431417 0.386441
G.IVI.BHZ.00 2021-09-24T12:02:40.75 10.0 positive automatic P 25 60.9472 -0.289208 0.397937
AU.MANU.BHZ.00 2021-09-24T12:02:35.48 10.0 positive automatic P 220 60.4162 -1.96536 0.140153
IU.CCM.BHZ.00 2021-09-24T12:02:33.05 10.0 positive automatic P 65 60.0177 -1.68151 0.392437
IU.MAKZ.BHZ.00 2021-09-24T12:02:33.10 10.0 positive automatic P 309 59.9394 -1.15633 0.339497
DK.ANGG.BHZ. 2021-09-24T12:02:30.50 10.0 positive automatic P 17 59.4883 -0.546355 0.428945
US.HDIL.BHZ.00 2021-09-24T12:02:29.70 10.0 positive automatic P 62 59.3922 -0.719578 0.42012
MX.HPIG.BHZ. 2021-09-24T12:02:28.31 10.0 positive automatic P 84 59.1185 -0.47798 0.414224
II.LVZ.BHZ.00 2021-09-24T12:02:22.02 10.0 negative automatic P 346 58.2798 -0.735073 0.42621
IU.KEV.BHZ.00 2021-09-24T12:02:17.87 10.0 negative automatic P 350 57.5683 0.192011 0.399362
US.JFWS.BHZ.00 2021-09-24T12:02:14.53 10.0 negative automatic P 60 57.2725 -1.10293 0.456765
US.AMTX.BHZ.00 2021-09-24T12:02:07.18 10.0 positive automatic P 75 56.0436 0.161654 0.464402
US.KSU1.BHZ.00 2021-09-24T12:02:07.35 10.0 positive automatic P 68 56.2263 -0.84661 0.426521
GE.SFJD.BHZ.00 2021-09-24T12:02:02.97 10.0 positive automatic P 22 55.5774 -0.579578 0.488725
MX.SRIG.BHZ. 2021-09-24T12:01:56.91 10.0 positive automatic P 89 54.7327 -0.497474 0.46791
US.CBKS.BHZ.00 2021-09-24T12:01:56.53 10.0 positive automatic P 70 54.5879 0.0607725 0.492455
MX.HSIG.BHZ. 2021-09-24T12:01:54.32 10.0 positive automatic P 87 54.345 -0.303089 0.484724
DK.ILULI.BHZ. 2021-09-24T12:01:49.66 10.0 positive automatic P 20 53.7031 -0.251286 0.511273
US.EYMN.BHZ.00 2021-09-24T12:01:46.70 10.0 positive automatic P 57 53.3494 -0.682627 0.512034
IU.ANMO.BHZ.00 2021-09-24T12:01:45.47 10.0 positive automatic P 78 53.094 -0.264242 0.42504
US.ECSD.BHZ.00 2021-09-24T12:01:44.90 10.0 positive automatic P 63 53.2196 -1.53001 0.49638
IU.TUC.BHZ.00 2021-09-24T12:01:38.95 10.0 negative automatic P 83 52.1849 0.0946103 0.518447
US.SDCO.BHZ.00 2021-09-24T12:01:36.60 10.0 positive automatic P 75 51.8429 0.010627 0.500606
US.OGNE.BHZ.00 2021-09-24T12:01:36.75 10.0 positive automatic P 69 51.8687 0.228327 0.494715
US.AGMN.BHZ.00 2021-09-24T12:01:27.48 10.0 positive automatic P 58 50.8276 -1.1197 0.464587
US.ISCO.BHZ.00 2021-09-24T12:01:26.40 10.0 positive automatic P 73 50.4682 0.104109 0.479192
US.MVCO.BHZ.00 2021-09-24T12:01:25.43 10.0 negative automatic P 77 50.3766 -0.0779832 0.541256
GE.KBS.BHZ.00 2021-09-24T12:01:20.97 10.0 positive automatic P 357 49.7135 0.85915 0.545729
US.WUAZ.BHZ.00 2021-09-24T12:01:20.63 10.0 negative automatic P 81 49.6913 0.422269 0.57209
IU.RSSD.BHZ.00 2021-09-24T12:01:12.35 10.0 positive automatic P 67 48.7573 -0.80087 0.581042
II.PFO.BHZ.00 2021-09-24T12:01:05.45 10.0 positive automatic P 86 47.7766 0.0102981 0.61214
DK.NEEM.BHZ.10 2021-09-24T12:01:01.50 10.0 positive automatic P 13 47.3952 -1.18972 0.597266
DK.NOR.BHZ. 2021-09-24T12:00:58.65 10.0 negative automatic P 3 46.861 0.554204 0.579451
US.BW06.BHZ.00 2021-09-24T12:00:53.93 10.0 positive automatic P 72 46.3129 -0.244444 0.575686
JP.JOW.BHZ. 2021-09-24T12:00:53.80 10.0 positive automatic P 259 46.3327 -0.179864 0.290844
NN.PRN.HHZ. 2021-09-24T12:00:53.43 10.0 positive automatic P 81 46.2091 0.203693 0.497357
US.DGMT.BHZ.00 2021-09-24T12:00:52.90 10.0 positive automatic P 62 46.1868 -0.0107944 0.640371
IU.ULN.BHZ.00 2021-09-24T12:00:52.07 10.0 positive automatic P 296 46.0386 0.163863 0.620605
US.LAO.BHZ.00 2021-09-24T12:00:51.83 10.0 positive automatic P 66 46.0255 0.144309 0.635613
US.HWUT.BHZ.00 2021-09-24T12:00:50.10 10.0 positive automatic P 74 45.7903 0.107829 0.59715
US.TPNV.BHZ.00 2021-09-24T12:00:50.00 10.0 negative automatic P 83 45.7526 0.34565 0.632942
II.TLY.BHZ.00 2021-09-24T12:00:50.32 10.0 positive automatic P 303 45.855 0.0370537 0.623797
US.DUG.BHZ.00 2021-09-24T12:00:50.95 10.0 positive automatic P 77 45.8741 0.363473 0.623464
US.AHID.BHZ.00 2021-09-24T12:00:47.28 10.0 positive automatic P 73 45.3927 0.411259 0.527583
US.RLMT.BHZ.00 2021-09-24T12:00:44.98 10.0 positive automatic P 69 45.138 0.111438 0.588447
US.LKWY.BHZ.00 2021-09-24T12:00:43.43 10.0 positive automatic P 70 44.784 1.32028 0.650145
US.ELK.BHZ.00 2021-09-24T12:00:36.58 10.0 positive automatic P 78 44.0644 0.256461 0.647833
II.FFC.BHZ.00 2021-09-24T12:00:35.82 10.0 positive automatic P 54 44.152 -0.87723 0.624745
US.BOZ.BHZ.00 2021-09-24T12:00:31.38 10.0 positive automatic P 70 43.4909 -0.219643 0.673472
US.EGMT.BHZ.00 2021-09-24T12:00:28.48 10.0 positive automatic P 66 43.2907 -1.41459 0.710558
US.HLID.BHZ.00 2021-09-24T12:00:26.70 10.0 positive automatic P 74 42.9509 -0.561779 0.460979
BK.CMB.BHZ.00 2021-09-24T12:00:24.10 10.0 positive automatic P 84 42.5039 0.640371 0.675656
JP.JSU.BHZ. 2021-09-24T12:00:16.80 10.0 positive automatic P 262 41.6857 0.0758673 0.682632
US.MSO.BHZ.00 2021-09-24T12:00:15.00 10.0 positive automatic P 69 41.4825 -0.206815 0.710518
US.WVOR.BHZ.00 2021-09-24T12:00:11.98 10.0 positive automatic P 78 41.0143 0.601757 0.710933
US.BMO.BHZ.00 2021-09-24T12:00:07.33 10.0 positive automatic P 74 40.5099 0.143361 0.673361
IU.INCN.BHZ.00 2021-09-24T12:00:04.77 10.0 positive automatic P 272 40.195 0.388467 0.664435
US.NEW.BHZ.00 2021-09-24T11:59:53.93 10.0 positive automatic P 69 38.9064 0.15857 0.796993
US.HAWA.BHZ.00 2021-09-24T11:59:50.05 10.0 positive automatic P 73 38.3844 0.736844 0.778771
JP.JMN.BHZ. 2021-09-24T11:59:47.45 10.0 positive automatic P 261 38.0594 0.838648 0.673013
IU.COR.BHZ.00 2021-09-24T11:59:39.82 10.0 positive automatic P 78 37.0042 2.22328 0.825841
US.NLWA.BHZ.00 2021-09-24T11:59:24.60 10.0 positive automatic P 74 35.3029 1.46311 0.821062
G.INU.BHZ.00 2021-09-24T11:59:21.06 10.0 positive automatic P 260 35.0406 0.269432 0.845988
JP.JHJ2.BHZ. 2021-09-24T11:59:19.05 10.0 positive automatic P 255 34.8377 0.0190417 0.793478
JP.JGF.BHZ. 2021-09-24T11:59:17.60 10.0 positive automatic P 261 34.6742 -0.108298 0.746831
IU.MAJO.BHZ.00 2021-09-24T11:59:07.87 10.0 positive automatic P 261 33.5424 0.0107846 0.818538
IU.YAK.BHZ.00 2021-09-24T11:58:28.52 10.0 positive automatic P 312 29.3131 -2.0726 0.816327
II.ERM.BHZ.00 2021-09-24T11:58:12.62 10.0 positive automatic P 265 27.2163 0.738208 0.615385
AT.SKAG.BHZ. 2021-09-24T11:58:01.04 10.0 negative automatic P 54 25.6424 3.35398 0.943396
IU.YSS.BHZ.00 2021-09-24T11:57:53.50 10.0 positive automatic P 275 25.1092 0.653092 0.888889
IU.COLA.BHZ.00 2021-09-24T11:57:10.35 10.0 positive automatic P 38 21.0446 -1.71599 0.43956
IU.MA2.BHZ.00 2021-09-24T11:56:48.42 10.0 positive automatic P 308 18.8851 -0.148571 0.754717
IU.BILL.BHZ.00 2021-09-24T11:56:43.17 10.0 positive automatic P 343 18.2934 1.15537 0.851064
AT.TTA.BHZ. 2021-09-24T11:56:27.70 10.0 positive automatic P 38 16.9712 1.9377 0.909091
II.KDAK.BHZ.00 2021-09-24T11:56:17.20 10.0 positive automatic P 56 16.5617 -3.26519 0.963855
IU.PET.BHZ.00 2021-09-24T11:55:44.32 10.0 positive automatic P 286 13.7897 0.573345 0.769231
AK.GAMB.BHZ. 2021-09-24T11:55:37.57 10.0 negative automatic P 14 13.1575 2.46152 0.328947
AT.AKUT.BHZ. 2021-09-24T11:54:34.54 10.0 negative automatic P 65 8.5286 2.7914 0.970874
AT.SMY.BHZ. 2021-09-24T11:53:37.02 10.0 positive automatic P 293 4.5163 0.3635 0.877193
IU.ADK.BHZ.00 2021-09-24T11:52:55.85 10.0 positive automatic P 64 1.5961 -0.673976 0.987654
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