Earthquake with magnitude of Mwp 6.3 on date 07-11-2020 and time 09:27:04 (UTC) 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) -15.265, -173.533 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 updated as more data become available. See http://shakemap.ingv.it for additional information. The black star indicates the epicenter. The triangles show the accelerometric and velocimetric stations used in the calculation, colored according to the recorded shaking.

Intensity Shakemap

Intensity Shakemap

This map shows the distribution of instrumental intensities. The intensity is derived through an empirical law that correlates the recorded values of actual ground shaking, e.g., acceleration and velocity, with the macroseismic intensity for Italian earthquakes, as reported in the Italian Macroseismic Database (DBMI15, https://doi.org/10.13127/cpti/cpti15.3).
Peak ground acceleration Shakemap

Peak ground acceleration Shakemap

This map shows the distribution of peak ground acceleration expressed as percent 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
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
-15.2648 -173.533 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 -15.2648
Longitude -173.5330
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
G.COYC.BHZ.00 2020-11-07T09:39:49.70 10.0 positive automatic PcP 137 86.9037 0.913294 0
IU.HKT.BHZ.00 2020-11-07T09:39:49.52 10.0 negative automatic PcP 58 87.3229 -1.00939 0
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 2020-11-07T09:39:30.60 10.0 negative automatic P 46 83.6757 -0.260055 0.132877
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. 2020-11-07T09:39:14.92 10.0 negative automatic P 19 80.879 -0.855167 0.162245
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 2020-11-07T09:39:07.60 10.0 positive automatic ScP 313 9.7955 1.75887 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.WUAZ.BHZ.00 2020-11-07T09:38:58.73 10.0 positive automatic P 47 77.6534 0.314378 0.186471
US.ELK.BHZ.00 2020-11-07T09:38:58.53 10.0 negative automatic P 41 77.7401 -0.473882 0.18777
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
G.KIP.BHZ.00 2020-11-07T09:34:33.90 10.0 positive automatic P 23 39.7178 -0.242091 0.687286
IU.WAKE.BHZ.00 2020-11-07T09:34:33.15 10.0 positive automatic P 330 39.6684 -0.565248 0.753701
IU.POHA.BHZ.00 2020-11-07T09:34:29.65 10.0 positive automatic P 27 39.2393 -0.827471 0.695771
G.CAN.BHZ.00 2020-11-07T09:34:27.60 10.0 positive automatic P 232 39.0162 -0.784083 0.731548
IU.PMG.BHZ.00 2020-11-07T09:34:27.37 10.0 positive automatic P 274 38.7884 1.00223 0.674484
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
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