Earthquake with magnitude of Mwp 6.0 on date 11-12-2017 and time 11:50:02 (Italy) in region Tonga Islands [Sea: Tonga]

A magnitude Mwp 6.0 earthquake occured in region: Tonga Islands [Sea: Tonga], on

  • 11-12-2017 10:50:02 (UTC)
  • 11-12-2017 11:50:02 (UTC +01:00) Italian time
  • 11-12-2017 23:50:02 (UTC +13:00) local time in the region of the earthquake (Pacific/Tongatapu)

and geographic coordinates (lat, lon) -20.92, -173.65 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.

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 5.3
Mwp 6.0

Mwpd 6.0
2017-12-11
10:50:02
-20.92 -173.65 10 2017-12-11
11:09:49
Sala Sismica INGV-Roma 52519081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-12-11 10:50:02
Latitude -20.92
Longitude -173.65
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 52519081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 21874
Semi-minor axis of confidence ellipse (meter) 14897
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 332
Circular confidence region, given by single value of horizontal uncertainty (meter) 17658.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108.878
Number of associated phases, regardless of their use for origin computation 63
Number of defining phases 63
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 2.26654
Epicentral distance of station closest to the epicenter (degree) 3.95221
Epicentral distance of station farthest from the epicenter (degree) 87.04006
Number of stations at which the event was observed 52
Number of stations from which data was used for origin computation 52
Magnitudes information

Mwpd:6

Field Value
Value 6
Uncertainty 0.1
Num. used stations 11
Type of magnitude Mwpd
Reference to an origin 52519081
Agency INGV
Autore Auto added
Time of creation (UTC) 2017-12-11 11:09:49

Mwp:6

Field Value
Value 6
Uncertainty 0.1
Num. used stations 13
Type of magnitude Mwp
Reference to an origin 52519081
Agency INGV
Autore Auto added
Time of creation (UTC) 2017-12-11 11:09:49

mb:5.3

Field Value
Value 5.3
Uncertainty 0.1
Num. used stations 25
Type of magnitude mb
Reference to an origin 52519081
Agency INGV
Autore Auto added
Time of creation (UTC) 2017-12-11 11:09:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
US.BOZ.BHZ.00 2017-12-11T11:02:48.68 10.0 negative automatic P 38 87.0401 2.34036 0.11546
US.BW06.BHZ.00 2017-12-11T11:02:46.38 10.0 positive automatic P 41 86.7169 1.51014 0.112563
US.NEW.BHZ.00 2017-12-11T11:02:40.98 10.0 positive automatic P 34 85.6062 1.84318 0.103233
US.HWUT.BHZ.00 2017-12-11T11:02:37.70 10.0 negative automatic P 42 84.8373 2.22955 0.131199
IU.ANMO.BHZ.00 2017-12-11T11:02:37.92 10.0 positive automatic P 49 84.7002 3.14444 0.130763
GE.BKNI.BHZ. 2017-12-11T11:02:38.62 10.0 positive automatic P 272 85.7342 -1.02772 0
US.MVCO.BHZ.00 2017-12-11T11:02:38.13 10.0 positive automatic P 47 84.4447 4.57869 0.137609
US.MNTX.BHZ.00 2017-12-11T11:02:33.33 10.0 positive automatic P 53 83.8722 2.99723 0.142415
US.HLID.BHZ.00 2017-12-11T11:02:34.53 10.0 negative automatic P 39 84.2467 2.05175 0.137604
US.DUG.BHZ.00 2017-12-11T11:02:30.05 10.0 negative automatic P 42 83.2612 2.67723 0.142487
US.HAWA.BHZ.00 2017-12-11T11:02:28.70 10.0 positive automatic P 34 83.1557 2.06349 0.141718
US.WUAZ.BHZ.00 2017-12-11T11:02:22.33 10.0 negative automatic P 47 81.584 3.69396 0.16052
US.ELK.BHZ.00 2017-12-11T11:02:23.70 10.0 positive automatic P 41 82.0826 2.33078 0.156094
US.WVOR.BHZ.00 2017-12-11T11:02:18.30 10.0 positive automatic P 38 81.114 2.20367 0.162809
IU.TUC.BHZ.00 2017-12-11T11:02:15.07 10.0 negative automatic P 50 80.2526 3.65844 0.166686
US.TPNV.BHZ.00 2017-12-11T11:02:08.90 10.0 positive automatic P 43 79.1845 3.1687 0.178433
BK.CMB.BHZ.00 2017-12-11T11:01:57.90 10.0 negative automatic P 40 77.2819 2.8563 0
BK.SAO.BHZ.00 2017-12-11T11:01:49.37 10.0 positive automatic P 41 75.8187 2.68472 0.211154
MY.SBM.BHZ. 2017-12-11T11:01:49.62 10.0 negative automatic P 278 76.1214 1.21817 0
JP.JNU.BHZ. 2017-12-11T11:01:47.10 10.0 positive automatic P 315 75.6213 1.5043 0.208314
IU.MAJO.BHZ.00 2017-12-11T11:01:31.62 10.0 positive automatic P 321 73.2522 -0.16944 0.232547
MY.LDM.BHZ. 2017-12-11T11:01:22.12 10.0 positive automatic P 283 71.4259 1.27255 0.121913
IU.CASY.BHZ.00 2017-12-11T11:00:44.67 10.0 positive automatic P 205 65.229 2.66646 0.219671
AU.MORW.BHZ. 2017-12-11T11:00:30.05 10.0 positive automatic P 247 63.3475 0.327565 0.168406
GE.SANI.BHZ. 2017-12-11T11:00:17.02 10.0 positive automatic P 279 61.6779 -1.49832 0.354008
IU.MBWA.BHZ.00 2017-12-11T11:00:17.37 10.0 positive automatic P 257 61.6666 -1.09893 0.37025
GE.TNTI.BHZ. 2017-12-11T11:00:16.77 10.0 positive automatic P 283 61.5429 -0.837749 0.251742
GE.SOEI.BHZ. 2017-12-11T11:00:10.77 10.0 positive automatic P 270 60.5584 -0.327715 0.38509
AU.FITZ.BHZ. 2017-12-11T10:59:44.90 10.0 positive automatic P 261 56.9542 -0.956868 0.43538
AU.WRKA.BHZ. 2017-12-11T10:59:17.40 10.0 positive automatic P 254 53.2072 -1.47817 0.490932
AU.FORT.BHZ. 2017-12-11T10:59:14.92 10.0 negative automatic P 247 52.8048 -0.906468 0.497096
AU.KDU.BHZ. 2017-12-11T10:59:07.77 10.0 positive automatic P 270 52.0009 -2.06821 0.443942
AU.HTT.BHZ. 2017-12-11T10:58:02.72 10.0 positive automatic P 243 43.6072 -2.14413 0.514105
AU.COEN.BHZ. 2017-12-11T10:57:47.62 10.0 positive automatic P 272 41.6503 -1.27477 0.458992
IU.PMG.BHZ.00 2017-12-11T10:57:28.47 10.0 positive automatic P 281 39.4131 -1.88898 0.350148
AU.TOO.BHZ. 2017-12-11T10:57:25.80 10.0 positive automatic P 236 38.9538 -0.81413 0.741136
AU.QLP.BHZ. 2017-12-11T10:57:23.37 10.0 positive automatic P 253 38.7908 -1.80257 0.703768
IU.CTAO.BHZ.00 2017-12-11T10:57:12.67 10.0 positive automatic P 264 37.4654 -1.35178 0.643705
G.CAN.BHZ.00 2017-12-11T10:56:58.50 10.0 negative automatic P 238 35.6816 -0.365588 0.760462
AU.ARMA.BHZ. 2017-12-11T10:56:31.57 10.0 positive automatic P 246 32.5569 -0.254262 0.414331
AU.EIDS.BHZ. 2017-12-11T10:56:31.47 10.0 positive automatic P 255 32.6401 -0.927794 0.89596
NZ.KHZ.HHZ.10 2017-12-11T10:55:15.52 10.0 negative automatic P 204 24.039 -0.00175149 0.462963
G.PPTF.BHZ.00 2017-12-11T10:55:08.15 10.0 positive automatic P 86 22.9553 3.23364 0.952381
ND.KOUNC.BHZ.00 2017-12-11T10:54:40.14 10.0 positive automatic P 267 20.622 0.327862 0.909091
NZ.URZ.HHZ.10 2017-12-11T10:54:24.35 10.0 negative automatic P 203 19.0868 1.27292 0.980392
G.DZM.BHZ.00 2017-12-11T10:54:17.45 10.0 positive automatic P 263 18.5448 0.192827 0.888889
ND.ONTNC.BHZ.00 2017-12-11T10:54:16.75 10.0 positive automatic P 262 18.5361 -0.279182 0.677966
NZ.OUZ.HHZ.10 2017-12-11T10:54:14.54 10.0 negative automatic P 215 18.1629 1.9056 0.930233
IU.FUNA.BHZ.00 2017-12-11T10:53:25.52 10.0 negative automatic P 330 14.1844 4.24976 0.930233
IU.RAR.BHZ.00 2017-12-11T10:53:01.47 10.0 positive automatic P 94 12.947 -2.9126 0.930233
IU.AFI.BHZ.00 2017-12-11T10:51:42.77 10.0 positive automatic P 15 7.2319 -3.44486 0.930233
AU.NIUE.BHZ. 2017-12-11T10:50:58.35 10.0 positive automatic P 63 3.9522 -2.70787 0.91954
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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