ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Mwp 6.4 on date 09-10-2017 and time 00:34:35 (Italy) in region Rat Islands, Aleutian Islands, United States [Sea: United States]

A magnitude Mwp 6.4 earthquake occured in region: Rat Islands, Aleutian Islands, United States [Sea: United States], on

  • 08-10-2017 22:34:35 (UTC)
  • 09-10-2017 00:34:35 (UTC +02:00) Italian time
  • 08-10-2017 13:34:35 (UTC -09:00) local time in the region of the earthquake (America/Adak)

and geographic coordinates (lat, lon) 52.31, 176.85 at 126 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
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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
Rev 100 mb 5.6
Mwp 6.4

Mwpd 6.5
2017-10-08
22:34:35
52.31 176.85 126 2017-10-08
22:56:52
Sala Sismica INGV-Roma 50805731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-10-08 22:34:35
Latitude 52.31
Longitude 176.85
Depth (km) 126 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 50805731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 13392
Semi-minor axis of confidence ellipse (meter) 5036
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 167
Circular confidence region, given by single value of horizontal uncertainty (meter) 11559.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71.6539
Number of associated phases, regardless of their use for origin computation 90
Number of defining phases 90
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.755595
Epicentral distance of station closest to the epicenter (degree) 5.47957
Epicentral distance of station farthest from the epicenter (degree) 54.84958
Number of stations at which the event was observed 73
Number of stations from which data was used for origin computation 73
Magnitudes information

Mwpd:6.5

Field Value
Value 6.5
Uncertainty 0.2
Num. used stations 36
Type of magnitude Mwpd
Reference to an origin 50805731
Agency INGV
Autore Auto added
Time of creation (UTC) 2017-10-08 22:56:52

Mwp:6.4

Field Value
Value 6.4
Uncertainty 0.1
Num. used stations 42
Type of magnitude Mwp
Reference to an origin 50805731
Agency INGV
Autore Auto added
Time of creation (UTC) 2017-10-08 22:56:52

mb:5.6

Field Value
Value 5.6
Uncertainty 0.1
Num. used stations 47
Type of magnitude mb
Reference to an origin 50805731
Agency INGV
Autore Auto added
Time of creation (UTC) 2017-10-08 22:56:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
US.EYMN.BHZ.00 2017-10-08T22:43:51.98 10.0 positive automatic P 55 54.8496 0.104186 0
IU.XMAS.BHZ.00 2017-10-08T22:43:49.52 10.0 positive automatic P 148 54.6305 -0.692493 0.474831
US.SDCO.BHZ.00 2017-10-08T22:43:46.18 10.0 positive automatic P 73 53.9976 0.106513 0.513976
US.OGNE.BHZ.00 2017-10-08T22:43:44.98 10.0 positive automatic P 68 53.8513 0.228566 0.498123
IU.TATO.BHZ.00 2017-10-08T22:43:42.37 10.0 positive automatic pP 259 49.5147 0.829743 0
GE.KBS.BHZ.00 2017-10-08T22:43:39.67 10.0 positive automatic sP 356 48.4574 -6.69574 0
GE.SUMG.BHZ. 2017-10-08T22:43:37.55 10.0 positive automatic P 13 52.7301 0.62634 0
US.MVCO.BHZ.00 2017-10-08T22:43:35.10 10.0 positive automatic P 75 52.6072 -0.735285 0.500134
US.ISCO.BHZ.00 2017-10-08T22:43:35.60 10.0 positive automatic P 71 52.5625 -0.00358234 0.524672
IW.SMCO.BHZ.00 2017-10-08T22:43:32.50 10.0 positive automatic P 72 52.1834 -0.432516 0
US.WUAZ.BHZ.00 2017-10-08T22:43:31.43 10.0 positive automatic P 79 52.0235 -0.00119866 0.521012
IU.RSSD.BHZ.00 2017-10-08T22:43:20.62 10.0 positive automatic P 66 50.6708 -0.814647 0.555685
GE.DAG.BHZ. 2017-10-08T22:43:19.75 10.0 positive automatic P 5 50.5443 -0.384669 0.557789
NN.PRN.HHZ. 2017-10-08T22:43:05.35 10.0 positive automatic P 79 48.5588 0.0172504 0
GE.KBS.BHZ.00 2017-10-08T22:43:04.92 10.0 positive automatic P 356 48.4574 0.605614 0.579307
US.TPNV.BHZ.00 2017-10-08T22:43:03.05 10.0 positive automatic P 81 48.1366 0.933607 0.571414
DK.KULLO.BHZ. 2017-10-08T22:43:02.50 10.0 positive automatic P 17 48.1316 0.693349 0
US.BW06.BHZ.00 2017-10-08T22:43:02.75 10.0 positive automatic P 70 48.3869 -1.39215 0.466562
US.DUG.BHZ.00 2017-10-08T22:43:01.45 10.0 positive automatic P 75 48.0985 -0.352393 0.578615
US.HWUT.BHZ.00 2017-10-08T22:43:00.15 10.0 positive automatic P 73 47.9441 -0.52382 0.587952
US.LAO.BHZ.00 2017-10-08T22:43:00.30 10.0 positive automatic P 64 47.8833 0.25431 0.58221
US.DGMT.BHZ.00 2017-10-08T22:42:59.63 10.0 negative automatic P 61 47.9298 -0.734833 0.588193
US.AHID.BHZ.00 2017-10-08T22:42:56.75 10.0 positive automatic P 71 47.497 -0.499683 0.602539
US.RLMT.BHZ.00 2017-10-08T22:42:53.95 10.0 positive automatic P 68 47.1184 -0.391222 0.601992
US.LKWY.BHZ.00 2017-10-08T22:42:52.48 10.0 positive automatic P 69 46.808 0.486003 0.555627
US.ELK.BHZ.00 2017-10-08T22:42:47.63 10.0 positive automatic P 76 46.3171 -0.49785 0.623022
DK.NOR.BHZ. 2017-10-08T22:42:44.30 10.0 positive automatic P 3 45.8911 -0.111265 0
II.FFC.BHZ.00 2017-10-08T22:42:41.82 10.0 positive automatic P 53 45.5574 -0.0268727 0.614695
US.BOZ.BHZ.00 2017-10-08T22:42:40.78 10.0 positive automatic P 69 45.4981 -0.818786 0.66076
US.EGMT.BHZ.00 2017-10-08T22:42:38.00 10.0 positive automatic P 65 45.1602 -0.837657 0.515962
US.HLID.BHZ.00 2017-10-08T22:42:37.85 10.0 positive automatic P 72 45.0899 -0.555993 0.595634
BK.SAO.BHZ.00 2017-10-08T22:42:37.82 10.0 positive automatic P 85 45.1053 -0.457397 0.595381
BK.CMB.BHZ.00 2017-10-08T22:42:36.95 10.0 positive automatic P 83 44.9315 -0.0244403 0
DK.TULEG.BHZ. 2017-10-08T22:42:35.30 10.0 positive automatic P 18 44.6904 0.354639 0.615607
JP.JOW.BHZ. 2017-10-08T22:42:29.95 10.0 negative automatic P 254 44.0913 -0.262824 0.563202
US.MSO.BHZ.00 2017-10-08T22:42:24.90 10.0 positive automatic P 68 43.4821 -0.625014 0.698276
BK.MCCM.BHZ.00 2017-10-08T22:42:24.02 10.0 positive automatic P 84 43.3469 -0.202155 0.499722
IU.ULN.BHZ.00 2017-10-08T22:42:23.97 10.0 negative automatic P 293 43.2393 0.334896 0.68613
US.WVOR.BHZ.00 2017-10-08T22:42:23.55 10.0 positive automatic P 76 43.2728 -0.307985 0.647
US.BMO.BHZ.00 2017-10-08T22:42:18.13 10.0 positive automatic P 73 42.6533 -0.713683 0.643385
UW.BRAN.BHZ. 2017-10-08T22:42:13.28 10.0 positive automatic P 71 42.0708 -0.848824 0.646335
US.NEW.BHZ.00 2017-10-08T22:42:03.90 10.0 positive automatic P 68 40.8999 -0.606207 0.704864
US.HAWA.BHZ.00 2017-10-08T22:42:00.13 10.0 positive automatic P 72 40.5046 -1.07135 0.553193
CN.EUNU.BHZ. 2017-10-08T22:41:56.70 10.0 positive automatic P 16 39.9132 0.332218 0.767232
IU.COR.BHZ.00 2017-10-08T22:41:51.67 10.0 positive automatic P 77 39.2663 0.749693 0.743798
IU.POHA.BHZ.00 2017-10-08T22:41:49.67 10.0 negative automatic P 136 38.9789 0.811628 0.767112
JP.JNU.BHZ. 2017-10-08T22:41:40.75 10.0 negative automatic P 258 37.9694 0.580996 0.768659
JP.JTU.BHZ. 2017-10-08T22:41:39.50 10.0 negative automatic P 261 37.8925 0.0545593 0.735918
IU.INCN.BHZ.00 2017-10-08T22:41:37.67 10.0 positive automatic P 267 37.6331 0.411325 0.653577
US.NLWA.BHZ.00 2017-10-08T22:41:36.18 10.0 positive automatic P 73 37.4546 0.319276 0.735859
G.KIP.BHZ.00 2017-10-08T22:41:28.57 10.0 negative automatic P 138 36.4589 1.2235 0.746081
JP.JCJ.BHZ. 2017-10-08T22:41:24.00 10.0 negative automatic P 239 36.0835 -0.157605 0.787236
JP.JMN.BHZ. 2017-10-08T22:41:22.40 10.0 positive automatic P 256 35.7575 0.948248 0.83134
G.INU.BHZ.00 2017-10-08T22:40:55.51 10.0 negative automatic P 255 32.7665 -0.0763714 0.89329
IU.MAJO.BHZ.00 2017-10-08T22:40:42.42 10.0 negative automatic P 255 31.2548 0.0082593 0.844972
JP.JSD.BHZ. 2017-10-08T22:40:32.80 10.0 positive automatic P 257 30.2293 -0.545023 0.765355
AT.CRAG.BHZ. 2017-10-08T22:40:23.74 10.0 positive automatic P 64 29.0098 1.19069 0.909091
JP.JMM.BHZ. 2017-10-08T22:40:21.05 10.0 negative automatic P 254 28.8404 -0.00723548 0.930233
IU.TIXI.BHZ.00 2017-10-08T22:40:16.12 10.0 positive automatic P 330 28.3636 -0.700598 0.909091
CN.INK.BHZ. 2017-10-08T22:40:14.95 10.0 positive automatic P 37 28.1577 -0.0420123 0.930233
AT.SKAG.BHZ. 2017-10-08T22:40:06.40 10.0 positive automatic P 56 27.1105 0.716692 0.917431
JP.JTM.BHZ. 2017-10-08T22:40:02.90 10.0 negative automatic P 259 26.8114 -0.110156 0.952381
IU.YAK.BHZ.00 2017-10-08T22:40:00.32 10.0 negative automatic P 310 26.6408 -1.15676 0.930233
II.ERM.BHZ.00 2017-10-08T22:39:45.47 10.0 negative automatic P 259 24.8206 0.425308 0.833333
IU.MIDW.BHZ.00 2017-10-08T22:39:41.67 10.0 positive automatic P 168 24.4709 -0.19767 0.816327
IU.YSS.BHZ.00 2017-10-08T22:39:24.55 10.0 negative automatic P 270 22.4887 0.798469 0.952381
II.KDAK.BHZ.00 2017-10-08T22:38:35.70 10.0 positive automatic P 60 18.1709 -1.73309 0.909091
AT.TTA.BHZ. 2017-10-08T22:38:34.42 10.0 positive automatic P 43 17.7831 1.09726 0.917431
IU.MA2.BHZ.00 2017-10-08T22:38:13.72 10.0 negative automatic P 307 16.1691 -0.916402 0.769231
AK.TNA.BHZ. 2017-10-08T22:38:05.19 10.0 positive automatic P 24 15.3162 1.14935 0.826446
AK.GAMB.BHZ. 2017-10-08T22:37:34.21 10.0 positive automatic P 23 12.9277 0.565085 0.943396
IU.PET.BHZ.00 2017-10-08T22:37:08.25 10.0 positive automatic P 281 11.0292 -0.462137 0.909091
AT.AKUT.BHZ. 2017-10-08T22:37:03.04 10.0 positive automatic P 73 10.5379 0.869327 0.884956
AK.ATKA.BHZ. 2017-10-08T22:35:53.31 10.0 positive automatic P 88 5.4796 -0.772212 0.909091
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download