INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of Mwp 6.0 on date 16-07-2017 and time 19:06:43 (Italy) in region Tonga Islands [Sea: Tonga]

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

  • 16-07-2017 17:06:43 (UTC)
  • 16-07-2017 19:06:43 (UTC +02:00) Italian time
  • 17-07-2017 06:06:43 (UTC +13:00) local time in the region of the earthquake (Pacific/Tongatapu)

and geographic coordinates (lat, lon) -20.33, -173.53 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 Date and Time (UTC) Latitude Longitude Magnitude Depth (km) Published time (UTC) Author Location ID
Rev 100 2017-07-16
17:06:43
-20.33 -173.53 mb 5.4
Mwp 6.0
Mwpd 6.1
10 2017-07-16
17:34:45
Sala Sismica INGV-Roma 47957511
Best location and best magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-07-16 17:06:43
Latitude -20.33
Longitude -173.53
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 47957511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 23798
Semi-minor axis of confidence ellipse (meter) 16121
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 153
Circular confidence region, given by single value of horizontal uncertainty (meter) 19209.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80.7136
Number of associated phases, regardless of their use for origin computation 123
Number of defining phases 123
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 2.27121
Epicentral distance of station closest to the epicenter (degree) 3.612
Epicentral distance of station farthest from the epicenter (degree) 90.33942
Number of stations at which the event was observed 102
Number of stations from which data was used for origin computation 102
Magnitudes information

Mwp:6

Field Value
Value 6
Uncertainty 0.1
Num. used stations 25
Type of magnitude Mwp
Reference to an origin 47957511
Agency INGV
Autore Auto added
Time of creation (UTC) 2017-07-16 17:34:45

Mwpd:6.1

Field Value
Value 6.1
Uncertainty 0.1
Num. used stations 20
Type of magnitude Mwpd
Reference to an origin 47957511
Agency INGV
Autore Auto added
Time of creation (UTC) 2017-07-16 17:34:45

mb:5.4

Field Value
Value 5.4
Uncertainty 0.1
Num. used stations 49
Type of magnitude mb
Reference to an origin 47957511
Agency INGV
Autore Auto added
Time of creation (UTC) 2017-07-16 17:34:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IU.RSSD.BHZ.00 2017-07-16T17:19:44.87 10.0 positive automatic P 42 90.3394 1.08068 0.0838228
US.LAO.BHZ.00 2017-07-16T17:19:45.50 10.0 positive automatic PcP 39 90.258 1.1177 0
US.WMOK.BHZ.00 2017-07-16T17:19:42.98 10.0 positive automatic P 52 89.7213 2.34763 0.0650531
GE.GSI.BHZ. 2017-07-16T17:19:41.77 10.0 positive automatic PcP 272 89.4158 1.25063 0
US.EGMT.BHZ.00 2017-07-16T17:19:38.55 10.0 positive automatic PcP 37 88.912 0.102067 0
US.EGAK.BHZ.00 2017-07-16T17:19:36.50 10.0 positive automatic PcP 13 88.6641 -0.72436 0
GE.SNAA.BHZ. 2017-07-16T17:19:33.66 10.0 positive automatic P 177 87.7753 2.14039 0.102624
US.AMTX.BHZ.00 2017-07-16T17:19:33.70 10.0 positive automatic P 51 87.6464 2.76956 0.101266
US.KVTX.BHZ.00 2017-07-16T17:19:35.00 10.0 negative automatic PcP 59 87.3801 3.49538 0
MY.KUM.BHZ. 2017-07-16T17:19:34.62 10.0 negative automatic PcP 276 87.9351 0.656932 0
US.RLMT.BHZ.00 2017-07-16T17:19:32.38 10.0 positive automatic PcP 40 87.6351 -0.610167 0
US.ISCO.BHZ.00 2017-07-16T17:19:32.53 10.0 positive automatic PcP 45 87.2145 1.28749 0
US.JCT.BHZ.00 2017-07-16T17:19:31.50 10.0 negative automatic PcP 56 87.1139 1.07619 0
US.LKWY.BHZ.00 2017-07-16T17:19:29.53 10.0 positive automatic PcP 40 86.6585 0.792544 0
IU.COLA.BHZ.00 2017-07-16T17:19:29.97 10.0 positive automatic P 11 87.4526 0.109097 0.109741
US.SDCO.BHZ.00 2017-07-16T17:19:27.03 10.0 positive automatic P 47 86.2803 2.47638 0.0559804
US.BOZ.BHZ.00 2017-07-16T17:19:27.25 10.0 positive automatic P 38 86.5053 1.76636 0.11955
US.AHID.BHZ.00 2017-07-16T17:19:21.18 10.0 positive automatic P 41 85.2472 1.85677 0.127926
US.BW06.BHZ.00 2017-07-16T17:19:25.80 10.0 negative automatic PcP 41 86.1981 -0.865902 0
IW.SMCO.BHZ.00 2017-07-16T17:19:25.08 10.0 positive automatic P 45 85.9942 1.79662 0.112783
US.MSO.BHZ.00 2017-07-16T17:19:23.18 10.0 positive automatic P 36 85.8997 0.734952 0
GE.BKNI.BHZ. 2017-07-16T17:19:23.22 10.0 positive automatic P 272 85.8286 1.3408 0
AT.SKAG.BHZ. 2017-07-16T17:19:22.98 10.0 positive automatic PcP 18 85.6792 -1.04229 0
AT.TTA.BHZ. 2017-07-16T17:19:19.34 10.0 positive automatic P 8 84.3939 4.48643 0.1377
IU.MA2.BHZ.00 2017-07-16T17:19:17.82 10.0 positive automatic P 343 85.059 -0.268375 0.125012
IU.ANMO.BHZ.00 2017-07-16T17:19:16.62 10.0 positive automatic P 49 84.2287 2.46475 0.120534
US.HWUT.BHZ.00 2017-07-16T17:19:16.18 10.0 positive automatic P 42 84.3193 1.55628 0.133818
US.MVCO.BHZ.00 2017-07-16T17:19:15.28 10.0 positive automatic P 47 83.9555 2.4533 0.0897867
US.HLID.BHZ.00 2017-07-16T17:19:13.53 10.0 positive automatic P 39 83.7144 2.00159 0.129693
US.MNTX.BHZ.00 2017-07-16T17:19:12.53 10.0 positive automatic P 53 83.4229 2.73379 0.144505
MX.TLIG.BHZ. 2017-07-16T17:19:10.66 10.0 negative automatic P 68 82.6906 4.54177 0.129242
US.BMO.BHZ.00 2017-07-16T17:19:08.00 10.0 positive automatic P 36 82.8382 1.10743 0.138006
US.ELK.BHZ.00 2017-07-16T17:19:02.18 10.0 positive automatic P 41 81.56 1.79711 0.156996
US.WUAZ.BHZ.00 2017-07-16T17:19:00.78 10.0 positive automatic P 47 81.0959 2.96642 0.166898
US.WVOR.BHZ.00 2017-07-16T17:18:56.88 10.0 positive automatic P 38 80.5768 1.88214 0
IU.TUC.BHZ.00 2017-07-16T17:18:53.67 10.0 positive automatic P 50 79.7837 3.02678 0.168967
NN.PRN.HHZ. 2017-07-16T17:18:53.08 10.0 positive automatic P 43 79.7173 2.70137 0.174317
II.KDAK.BHZ.00 2017-07-16T17:18:52.27 10.0 positive automatic P 11 80.034 0.404341 0.174672
BK.HUMO.BHZ.00 2017-07-16T17:18:44.92 10.0 negative automatic P 35 78.2731 2.61843 0.17871
IU.YSS.BHZ.00 2017-07-16T17:18:41.20 10.0 positive automatic P 331 77.949 0.769198 0.190125
MY.KSM.BHZ. 2017-07-16T17:18:39.87 10.0 positive automatic P 276 77.5677 1.58277 0
JP.JTU.BHZ. 2017-07-16T17:18:36.35 10.0 positive automatic P 315 77.1118 0.615302 0
BK.CMB.BHZ.00 2017-07-16T17:18:35.50 10.0 positive automatic P 40 76.7576 1.64565 0.192783
II.PFO.BHZ.00 2017-07-16T17:18:35.22 10.0 positive automatic P 46 76.5682 2.34097 0.213563
MY.SBM.BHZ. 2017-07-16T17:18:31.37 10.0 positive automatic P 278 76.152 1.03118 0.203068
JP.YOJ.BHZ. 2017-07-16T17:18:31.35 10.0 positive automatic P 303 76.2596 0.43794 0.177771
JP.JKA.BHZ. 2017-07-16T17:18:30.25 10.0 positive automatic PcP 327 73.6924 -1.60257 0
JP.JSU.BHZ. 2017-07-16T17:18:22.15 10.0 positive automatic P 313 74.6144 0.620565 0.0728168
II.ERM.BHZ.00 2017-07-16T17:18:19.42 10.0 positive automatic P 328 74.0709 1.1149 0
JP.JMN.BHZ. 2017-07-16T17:18:17.20 10.0 positive automatic P 317 73.6891 1.04303 0.227978
JP.JOW.BHZ. 2017-07-16T17:18:16.15 10.0 positive automatic P 308 73.4924 1.21027 0.240983
IU.MAJO.BHZ.00 2017-07-16T17:18:11.17 10.0 positive automatic P 321 72.8633 -0.0873322 0.247921
G.INU.BHZ.00 2017-07-16T17:18:10.66 10.0 positive automatic P 320 72.7612 0.0608998 0.2274
JP.JGF.BHZ. 2017-07-16T17:18:10.30 10.0 positive automatic P 320 72.7338 -0.21587 0.227678
JP.JMM.BHZ. 2017-07-16T17:18:07.70 10.0 positive automatic P 324 72.3041 -0.177515 0.2224
IU.ADK.BHZ.00 2017-07-16T17:18:07.47 10.0 positive automatic P 358 72.2593 -0.145578 0.237697
MY.LDM.BHZ. 2017-07-16T17:18:04.42 10.0 positive automatic P 283 71.4025 1.94811 0.246785
JP.JMZ.BHZ. 2017-07-16T17:17:59.10 10.0 negative automatic P 308 70.7377 0.684263 0.248433
IU.CASY.BHZ.00 2017-07-16T17:17:28.97 10.0 positive automatic P 205 65.8117 1.43375 0.166215
GE.LUWI.BHZ. 2017-07-16T17:17:22.97 10.0 positive automatic P 279 65.055 0.332786 0.334274
JP.JCJ.BHZ. 2017-07-16T17:17:14.90 10.0 positive automatic P 316 63.9346 -0.43232 0.348708
AU.MORW.BHZ. 2017-07-16T17:17:13.72 10.0 positive automatic P 247 63.6845 0.0124699 0.351972
GE.MMRI.BHZ. 2017-07-16T17:17:07.92 10.0 positive automatic P 271 62.9233 -0.718927 0.370617
IU.NWAO.BHZ.00 2017-07-16T17:17:04.22 10.0 negative automatic P 243 62.0999 1.03731 0.373003
IU.MBWA.BHZ.00 2017-07-16T17:17:00.95 10.0 positive automatic P 256 61.9171 -0.970695 0.371153
GE.SANI.BHZ. 2017-07-16T17:16:59.42 10.0 positive automatic P 279 61.6968 -0.991173 0.36985
GE.TNTI.BHZ. 2017-07-16T17:16:58.82 10.0 positive automatic P 283 61.5244 -0.428549 0.363869
GE.SOEI.BHZ. 2017-07-16T17:16:54.42 10.0 positive automatic P 270 60.6705 0.791913 0.392498
IU.SBA.BHZ.00 2017-07-16T17:16:40.95 10.0 positive automatic P 185 58.3018 3.84536 0.425896
GT.VNDA.BHZ.00 2017-07-16T17:16:40.93 10.0 negative automatic P 186 58.4348 2.87719 0.419111
AU.FITZ.BHZ. 2017-07-16T17:16:28.33 10.0 positive automatic P 261 57.1569 -0.736207 0.453064
AU.WRKA.BHZ. 2017-07-16T17:16:01.35 10.0 positive automatic P 253 53.4844 -1.32753 0.503886
AU.MTN.BHZ. 2017-07-16T17:15:59.67 10.0 positive automatic P 269 53.331 -1.79297 0.51233
AU.FORT.BHZ. 2017-07-16T17:15:58.82 10.0 positive automatic P 246 53.1465 -1.29103 0.49186
AU.KDU.BHZ. 2017-07-16T17:15:50.85 10.0 positive automatic P 270 52.1178 -1.62621 0.496426
II.WRAB.BHZ.00 2017-07-16T17:15:24.67 10.0 positive automatic P 261 48.714 -2.1096 0.575012
GE.GENI.BHZ. 2017-07-16T17:15:24.77 10.0 positive automatic P 285 48.4809 -0.159781 0.578915
IU.WAKE.BHZ.00 2017-07-16T17:14:50.27 10.0 positive automatic P 333 44.1122 -0.29994 0.686444
AU.HTT.BHZ. 2017-07-16T17:14:48.07 10.0 positive automatic P 242 43.9794 -1.55608 0.649336
AU.COEN.BHZ. 2017-07-16T17:14:30.37 10.0 positive automatic P 272 41.744 -1.05828 0.673928
II.TAU.BHZ.00 2017-07-16T17:14:15.42 10.0 negative automatic P 226 39.7239 0.699748 0.718417
GE.PMG.BHZ.00 2017-07-16T17:14:11.02 10.0 positive automatic P 280 39.4214 -1.16937 0.758495
AU.TOO.BHZ. 2017-07-16T17:14:10.95 10.0 positive automatic P 235 39.3842 -1.02619 0.724707
AU.QLP.BHZ. 2017-07-16T17:14:07.65 10.0 positive automatic P 252 39.0744 -1.66741 0.714233
IU.CTAO.BHZ.00 2017-07-16T17:13:55.77 10.0 positive automatic P 263 37.6457 -1.54826 0.774933
G.CAN.BHZ.00 2017-07-16T17:13:43.05 10.0 positive automatic P 237 36.0936 -1.11353 0.787045
AU.ARMA.BHZ. 2017-07-16T17:13:15.65 10.0 positive automatic P 245 32.906 -0.998217 0.849883
AU.EIDS.BHZ. 2017-07-16T17:13:14.60 10.0 positive automatic P 254 32.9047 -1.88218 0.859678
NZ.KHZ.HHZ.10 2017-07-16T17:12:08.66 10.0 negative automatic P 203 24.6262 6.01385 0.966184
G.PPTF.BHZ.00 2017-07-16T17:11:48.00 10.0 positive automatic P 87 22.8049 2.90754 0.909091
ND.KOUNC.BHZ.00 2017-07-16T17:11:22.49 10.0 positive automatic P 265 20.7747 -0.743893 0.833333
NZ.URZ.HHZ.10 2017-07-16T17:11:11.06 10.0 positive automatic P 202 19.6762 -0.236063 0.925926
AU.NFK.BHZ. 2017-07-16T17:11:03.20 10.0 positive automatic P 239 18.9266 0.0917771 0.761905
G.DZM.BHZ.00 2017-07-16T17:11:01.70 10.0 positive automatic P 261 18.741 0.51874 0.869565
ND.ONTNC.BHZ.00 2017-07-16T17:11:01.50 10.0 positive automatic P 260 18.7397 0.466368 0.930233
NZ.OUZ.HHZ.10 2017-07-16T17:10:59.38 10.0 positive automatic P 215 18.7126 -1.34923 0.829876
IU.RAO.BHZ.00 2017-07-16T17:08:59.80 10.0 negative automatic P 203 9.7691 -2.87498 0.963855
ND.MARNC.BHZ.00 2017-07-16T17:10:44.19 10.0 negative automatic P 263 17.2567 1.0144 0.816327
IU.RAR.BHZ.00 2017-07-16T17:09:40.82 10.0 positive automatic P 96 12.8853 -4.48765 0.754717
II.MSVF.BHZ.00 2017-07-16T17:08:48.87 10.0 positive automatic P 287 8.3665 5.29925 0.754717
IU.AFI.BHZ.00 2017-07-16T17:08:16.72 10.0 positive automatic P 15 6.6316 -3.01893 0.833333
AU.NIUE.BHZ. 2017-07-16T17:07:35.15 10.0 positive automatic P 70 3.612 -2.99648 0.941176
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