Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Mwp 6.3 on date 07-11-2020 and time 10:27:04 (Italy) in region Tonga Islands [Sea: Tonga]

A magnitude Mwp 6.3 earthquake occured in region: Tonga Islands [Sea: Tonga], on

  • 07-11-2020 09:27:04 (UTC)
  • 07-11-2020 10:27:04 (UTC +01:00) Italian time
  • 07-11-2020 23:27:04 (UTC +14:00) local time in the region of the earthquake (Pacific/Apia)

and geographic coordinates (lat, lon) -15.26, -173.53 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.

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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
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
Reviewed
Rev100 		mb 5.5
Mwp 6.3
Mwpd 6.4 		2020-11-07
09:27:04		 -15.26 -173.53 20 2020-11-07
09:49:28		 Sala Sismica INGV-Roma 84525501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-07 09:27:04
Latitude -15.26
Longitude -173.53
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 84525501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 12527
Semi-minor axis of confidence ellipse (meter) 7710
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 345
Circular confidence region, given by single value of horizontal uncertainty (meter) 11873.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 41.6388
Number of associated phases, regardless of their use for origin computation 110
Number of defining phases 110
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.24806
Epicentral distance of station closest to the epicenter (degree) 5.13669
Epicentral distance of station farthest from the epicenter (degree) 87.43115
Number of stations at which the event was observed 87
Number of stations from which data was used for origin computation 87
Magnitudes information

Mwpd:6.4

Field Value
Value 6.4
Uncertainty 0.1
Num. used stations 23
Type of magnitude Mwpd
Reference to an origin 84525501
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2020-11-07 09:49:28

Mwp:6.3

Field Value
Value 6.3
Uncertainty 0.2
Num. used stations 24
Type of magnitude Mwp
Reference to an origin 84525501
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2020-11-07 09:49:28

mb:5.5

Field Value
Value 5.5
Uncertainty 0.1
Num. used stations 45
Type of magnitude mb
Reference to an origin 84525501
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2020-11-07 09:49:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IU.HKT.BHZ.00 2020-11-07T09:39:49.52 10.0 negative automatic PcP 58 87.3229 -1.00939 0
G.COYC.BHZ.00 2020-11-07T09:39:49.55 10.0 positive automatic P 137 86.9037 2.98886 0.1112
US.CBKS.BHZ.00 2020-11-07T09:39:48.93 10.0 negative automatic P 49 87.4311 -0.273603 0
US.OGNE.BHZ.00 2020-11-07T09:39:45.18 10.0 negative automatic P 46 86.632 -0.196278 0.0547259
US.JCT.BHZ.00 2020-11-07T09:39:46.05 10.0 positive automatic sP 56 84.2929 4.77184 0
US.WMOK.BHZ.00 2020-11-07T09:39:44.60 10.0 positive automatic P 53 86.644 -0.73197 0.108178
US.LAO.BHZ.00 2020-11-07T09:39:43.70 10.0 negative automatic P 39 86.3438 -0.232789 0.114011
US.ISCO.BHZ.00 2020-11-07T09:39:43.60 10.0 positive automatic sP 46 83.6757 4.85666 0
GE.BKNI.BHZ. 2020-11-07T09:39:40.82 10.0 positive automatic P 272 85.6717 0.354334 0
US.AMTX.BHZ.00 2020-11-07T09:39:34.33 10.0 positive automatic P 52 84.4921 -0.391568 0.122459
US.EGMT.BHZ.00 2020-11-07T09:39:35.60 10.0 negative automatic P 37 84.8694 -1.0286 0
US.JCT.BHZ.00 2020-11-07T09:39:33.23 10.0 negative automatic P 56 84.2929 -0.412818 0.0694373
US.RLMT.BHZ.00 2020-11-07T09:39:30.90 10.0 negative automatic P 40 83.7387 -0.169417 0.136948
US.ISCO.BHZ.00 2020-11-07T09:39:30.65 10.0 negative automatic P 46 83.6757 -0.210055 0
US.SDCO.BHZ.00 2020-11-07T09:39:26.40 10.0 negative automatic P 48 82.8614 -0.225535 0.147548
US.BOZ.BHZ.00 2020-11-07T09:39:24.23 10.0 negative automatic P 38 82.5377 -0.547998 0.138881
US.BW06.BHZ.00 2020-11-07T09:39:22.28 10.0 positive automatic P 42 82.4125 -1.95642 0.0516817
IU.MA2.BHZ.00 2020-11-07T09:39:21.97 10.0 negative automatic sP 343 80.2251 2.08117 0
IU.COLA.BHZ.00 2020-11-07T09:39:21.82 10.0 negative automatic P 11 82.4785 -2.40619 0.149074
US.MSO.BHZ.00 2020-11-07T09:39:19.65 10.0 negative automatic P 37 81.8291 -1.35565 0.140002
US.AHID.BHZ.00 2020-11-07T09:39:18.43 10.0 negative automatic P 41 81.4273 -0.580842 0.154562
IU.ANMO.BHZ.00 2020-11-07T09:39:16.62 10.0 negative automatic P 50 80.9513 0.170454 0.160491
AT.SKAG.BHZ. 2020-11-07T09:39:14.96 10.0 negative automatic P 19 80.879 -0.815167 0
US.HWUT.BHZ.00 2020-11-07T09:39:13.45 10.0 negative automatic P 42 80.5466 -0.839658 0.160378
US.MNTX.BHZ.00 2020-11-07T09:39:13.45 10.0 negative automatic P 53 80.3751 0.331196 0.169488
US.MVCO.BHZ.00 2020-11-07T09:39:13.85 10.0 positive automatic P 47 80.4942 -0.215691 0.160833
IU.MA2.BHZ.00 2020-11-07T09:39:10.17 10.0 negative automatic P 343 80.2251 -2.13435 0.139645
US.HLID.BHZ.00 2020-11-07T09:39:09.98 10.0 negative automatic P 39 79.7806 -0.169212 0.154911
IU.FUNA.BHZ.00 2020-11-07T09:39:07.75 10.0 negative automatic ScP 313 9.7955 1.90887 0
US.BMO.BHZ.00 2020-11-07T09:39:03.75 10.0 negative automatic P 37 78.7807 -0.826255 0
AT.CRAG.BHZ. 2020-11-07T09:39:01.82 10.0 positive automatic P 22 78.4891 -0.963685 0.18242
US.HAWA.BHZ.00 2020-11-07T09:39:01.78 10.0 negative automatic P 35 78.4324 -0.749453 0.175311
CN.BBB.BHZ. 2020-11-07T09:38:59.63 10.0 positive automatic P 27 78.0394 -0.661296 0
US.ELK.BHZ.00 2020-11-07T09:38:58.53 10.0 negative automatic P 41 77.7401 -0.473882 0.18777
US.WUAZ.BHZ.00 2020-11-07T09:38:58.73 10.0 positive automatic P 47 77.6534 0.314378 0.186471
IU.TUC.BHZ.00 2020-11-07T09:38:52.42 10.0 negative automatic P 51 76.5446 0.354758 0.190567
US.NLWA.BHZ.00 2020-11-07T09:38:52.70 10.0 positive automatic P 32 76.7608 -0.5405 0.206519
NN.PRN.HHZ. 2020-11-07T09:38:48.50 10.0 positive automatic P 44 76.0701 -0.965799 0.222039
US.WVOR.BHZ.00 2020-11-07T09:38:51.95 10.0 negative automatic P 38 76.5931 -0.465155 0.198758
MY.SBM.BHZ. 2020-11-07T09:38:46.02 10.0 positive automatic P 277 75.5013 0.0178995 0
US.TPNV.BHZ.00 2020-11-07T09:38:43.28 10.0 negative automatic P 44 75.0189 -0.184855 0.219333
IU.QSPA.BHZ.00 2020-11-07T09:38:42.77 10.0 positive automatic P 180 74.679 1.05636 0.222856
II.KDAK.BHZ.00 2020-11-07T09:38:41.47 10.0 positive automatic P 11 75.0703 -2.03836 0.224012
IU.YSS.BHZ.00 2020-11-07T09:38:33.40 10.0 positive automatic P 331 73.5242 -1.10183 0.246503
BK.CMB.BHZ.00 2020-11-07T09:38:30.45 10.0 positive automatic P 41 72.9278 -0.633327 0.253233
MY.KKM.BHZ. 2020-11-07T09:38:29.72 10.0 positive automatic P 281 72.7542 -0.351942 0.209272
BK.SAO.BHZ.00 2020-11-07T09:38:22.45 10.0 negative automatic P 42 71.4958 -0.00773296 0.263341
JP.JKA.BHZ. 2020-11-07T09:38:22.85 10.0 negative automatic sP 326 69.4631 5.32466 0
JP.JOW.BHZ. 2020-11-07T09:38:18.50 10.0 negative automatic P 306 70.4349 2.50578 0.269215
GE.JAGI.BHZ. 2020-11-07T09:38:16.87 10.0 positive automatic P 266 70.8103 -1.40433 0.21097
IU.CASY.BHZ.00 2020-11-07T09:38:15.72 10.0 positive automatic P 204 70.4017 -0.0357126 0.269596
JP.JMN.BHZ. 2020-11-07T09:38:14.55 10.0 negative automatic P 315 70.0468 0.876768 0.273674
JP.JTM.BHZ. 2020-11-07T09:38:13.20 10.0 negative automatic P 325 70.0692 -0.537729 0.180875
G.INU.BHZ.00 2020-11-07T09:38:07.11 10.0 negative automatic P 318 68.9373 0.363971 0.135436
IU.MAJO.BHZ.00 2020-11-07T09:38:06.22 10.0 negative automatic P 320 68.9474 -0.63735 0.267816
JP.JGF.BHZ. 2020-11-07T09:38:05.70 10.0 negative automatic P 319 68.8876 -0.816497 0.274442
AK.ATKA.BHZ. 2020-11-07T09:37:54.77 10.0 negative automatic P 360 67.4659 -2.73994 0.270304
AU.MORW.BHZ. 2020-11-07T09:37:46.07 10.0 positive automatic P 245 65.7674 -0.633502 0.325254
IU.NWAO.BHZ.00 2020-11-07T09:37:38.20 10.0 positive automatic P 240 64.5115 -0.368395 0.357884
GT.VNDA.BHZ.00 2020-11-07T09:37:33.18 10.0 positive automatic P 186 63.4696 1.50444 0.342828
IU.SBA.BHZ.00 2020-11-07T09:37:33.32 10.0 positive automatic P 185 63.3468 2.47842 0.356401
IU.MBWA.BHZ.00 2020-11-07T09:37:29.35 10.0 positive automatic P 254 63.2292 -0.744536 0.345884
GE.SOEI.BHZ. 2020-11-07T09:37:14.82 10.0 positive automatic P 267 60.7858 0.992712 0.365411
AU.FITZ.BHZ. 2020-11-07T09:36:54.28 10.0 positive automatic P 258 58.0756 -0.675765 0.369073
IU.XMAS.BHZ.00 2020-11-07T09:36:27.42 10.0 positive automatic S 44 23.5136 4.17081 0
AU.HTT.BHZ. 2020-11-07T09:35:28.32 10.0 positive automatic P 238 46.4865 -0.666281 0.642747
II.TAU.BHZ.00 2020-11-07T09:35:03.27 10.0 negative automatic P 222 43.3433 -0.593759 0.684212
AU.QLP.BHZ. 2020-11-07T09:34:42.40 10.0 negative automatic P 247 40.8322 -0.988601 0.714323
IU.WAKE.BHZ.00 2020-11-07T09:34:33.15 10.0 positive automatic P 330 39.6684 -0.565248 0.753701
G.KIP.BHZ.00 2020-11-07T09:34:33.90 10.0 positive automatic P 23 39.7178 -0.242091 0.687286
IU.POHA.BHZ.00 2020-11-07T09:34:29.65 10.0 positive automatic P 27 39.2393 -0.827471 0.695771
IU.PMG.BHZ.00 2020-11-07T09:34:27.37 10.0 positive automatic P 274 38.7884 1.00223 0.674484
G.CAN.BHZ.00 2020-11-07T09:34:27.60 10.0 positive automatic P 232 39.0162 -0.784083 0.731548
IU.CTAO.BHZ.00 2020-11-07T09:34:23.92 10.0 positive automatic P 257 38.5248 -0.279544 0.785359
AU.ARMA.BHZ. 2020-11-07T09:33:56.35 10.0 positive automatic P 238 35.2998 -0.554204 0.767574
AU.EIDS.BHZ. 2020-11-07T09:33:49.57 10.0 positive automatic P 247 34.5652 -0.842373 0.394971
G.TAOE.BHZ.00 2020-11-07T09:33:40.20 10.0 positive automatic P 83 33.2304 1.29028 0.843376
NZ.ODZ.HHZ.10 2020-11-07T09:33:33.05 10.0 positive automatic P 201 32.634 -0.555441 0.922442
NZ.KHZ.HHZ.10 2020-11-07T09:33:03.35 10.0 positive automatic P 200 29.3359 -1.14395 0.952381
IU.SNZO.BHZ.00 2020-11-07T09:32:49.90 10.0 positive automatic P 199 27.9631 -2.39353 0.610687
IU.HNR.BHZ.00 2020-11-07T09:32:39.32 10.0 positive automatic P 280 26.5287 -0.0914485 0.761905
IU.XMAS.BHZ.00 2020-11-07T09:32:11.60 10.0 positive automatic P 44 23.5136 -0.38323 0.941176
G.PPTF.BHZ.00 2020-11-07T09:32:10.60 10.0 negative automatic P 99 23.0898 2.92178 0.909091
NZ.OUZ.HHZ.10 2020-11-07T09:32:06.86 10.0 positive automatic P 208 23.0513 -0.304046 0.328407
ND.KOUNC.BHZ.00 2020-11-07T09:31:53.45 10.0 positive automatic P 253 21.7356 0.271118 0.714286
IU.TARA.BHZ.00 2020-11-07T09:31:49.37 10.0 negative automatic P 320 21.3447 0.400661 0.888889
ND.ONTNC.BHZ.00 2020-11-07T09:31:37.94 10.0 positive automatic P 247 20.1881 1.4728 0.43956
G.SANVU.BHZ.00 2020-11-07T09:31:21.40 10.0 positive automatic P 267 18.5702 2.637 0.888889
ND.MARNC.BHZ.00 2020-11-07T09:31:19.70 10.0 positive automatic P 248 18.5496 1.16538 0.97561
IU.RAR.BHZ.00 2020-11-07T09:30:24.62 10.0 positive automatic P 117 14.3475 -0.434814 0.909091
IU.FUNA.BHZ.00 2020-11-07T09:29:23.75 10.0 positive automatic P 313 9.7955 0.920457 0.963855
AU.NIUE.BHZ. 2020-11-07T09:28:18.97 10.0 negative automatic P 138 5.1367 0.0690424 0.97561
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