INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of Mwp 6.1 on date 06-11-2018 and time 17:11:40 (Italy) in region Tonga Islands region [Sea: Tonga]

A magnitude Mwp 6.1 earthquake occured in region: Tonga Islands region [Sea: Tonga], on

  • 06-11-2018 16:11:40 (UTC)
  • 06-11-2018 17:11:40 (UTC +01:00) Italian time
  • 07-11-2018 05:11:40 (UTC +13:00) local time in the region of the earthquake (Pacific/Tongatapu)

and geographic coordinates (lat, lon) -22.34, -174.31 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 5.4
Mwp 6.1

Mwpd 6.2
2018-11-06
16:11:40
-22.34 -174.31 10 2018-11-06
16:28:42
Sala Sismica INGV-Roma 62839771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-11-06 16:11:40
Latitude -22.34
Longitude -174.31
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 62839771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 22443
Semi-minor axis of confidence ellipse (meter) 17236
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 134
Circular confidence region, given by single value of horizontal uncertainty (meter) 18115.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79.5843
Number of associated phases, regardless of their use for origin computation 81
Number of defining phases 81
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 2.83171
Epicentral distance of station closest to the epicenter (degree) 5.23535
Epicentral distance of station farthest from the epicenter (degree) 91.69296
Number of stations at which the event was observed 67
Number of stations from which data was used for origin computation 67
Magnitudes information

Mwp:6.1

Field Value
Value 6.1
Uncertainty 0.1
Num. used stations 16
Type of magnitude Mwp
Reference to an origin 62839771
Agency INGV
Autore Auto added
Time of creation (UTC) 2018-11-06 16:28:42

Mwpd:6.2

Field Value
Value 6.2
Uncertainty 0.1
Num. used stations 9
Type of magnitude Mwpd
Reference to an origin 62839771
Agency INGV
Autore Auto added
Time of creation (UTC) 2018-11-06 16:28:42

mb:5.4

Field Value
Value 5.4
Uncertainty 0.1
Num. used stations 36
Type of magnitude mb
Reference to an origin 62839771
Agency INGV
Autore Auto added
Time of creation (UTC) 2018-11-06 16:28:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IU.HKT.BHZ.00 2018-11-06T16:24:50.52 10.0 positive automatic PcP 58 91.693 3.61792 0
US.EGAK.BHZ.00 2018-11-06T16:24:43.40 10.0 negative automatic PcP 13 90.7882 0.379148 0
US.AMTX.BHZ.00 2018-11-06T16:24:38.75 10.0 negative automatic PcP 52 89.4685 1.45218 0
US.BOZ.BHZ.00 2018-11-06T16:24:34.40 10.0 positive automatic P 38 88.5331 2.77239 0.0913671
IU.COLA.BHZ.00 2018-11-06T16:24:36.85 10.0 negative automatic P 11 89.5637 0.616464 0
US.JCT.BHZ.00 2018-11-06T16:24:36.18 10.0 negative automatic PcP 56 88.8394 1.73742 0
GE.GSI.BHZ. 2018-11-06T16:24:34.77 10.0 positive automatic P 272 88.7518 2.36341 0.105358
US.SDCO.BHZ.00 2018-11-06T16:24:33.08 10.0 negative automatic P 48 88.1757 2.96375 0.107011
US.BW06.BHZ.00 2018-11-06T16:24:33.75 10.0 positive automatic P 42 88.1852 3.65262 0.103254
US.MSO.BHZ.00 2018-11-06T16:24:32.28 10.0 positive automatic PcP 37 87.9492 1.65277 0
AT.SKAG.BHZ. 2018-11-06T16:24:29.96 10.0 positive automatic PcP 19 87.8165 0.121823 0
US.AHID.BHZ.00 2018-11-06T16:24:28.40 10.0 negative automatic PcP 41 87.2429 0.781332 0
AT.TTA.BHZ. 2018-11-06T16:24:22.58 10.0 positive automatic P 8 86.4868 0.899094 0.119691
GE.SNAA.BHZ. 2018-11-06T16:24:22.41 10.0 negative automatic P 177 85.8023 4.13771 0.122124
GT.PLCA.BHZ.00 2018-11-06T16:24:21.28 10.0 positive automatic P 132 85.3298 5.31291 0.127271
US.HLID.BHZ.00 2018-11-06T16:24:21.05 10.0 positive automatic P 39 85.7361 2.94289 0.111017
US.MNTX.BHZ.00 2018-11-06T16:24:18.18 10.0 negative automatic P 53 85.2185 2.8774 0.123784
US.BMO.BHZ.00 2018-11-06T16:24:15.55 10.0 negative automatic P 37 84.8862 1.7952 0.120853
US.ELK.BHZ.00 2018-11-06T16:24:09.45 10.0 negative automatic P 41 83.5573 2.27053 0.13685
NN.PRN.HHZ. 2018-11-06T16:24:01.08 10.0 negative automatic PcP 44 81.6749 -1.97315 0
AU.MAW.BHZ. 2018-11-06T16:23:55.89 10.0 negative automatic P 199 80.7673 3.71253 0.163996
US.TPNV.BHZ.00 2018-11-06T16:23:54.53 10.0 negative automatic P 43 80.6367 2.77389 0.154392
BK.HUMO.BHZ.00 2018-11-06T16:23:53.30 10.0 positive automatic P 36 80.331 3.3652 0.147354
IU.YSS.BHZ.00 2018-11-06T16:23:45.15 10.0 positive automatic P 332 79.3688 0.508549 0.176719
II.PFO.BHZ.00 2018-11-06T16:23:43.37 10.0 negative automatic P 46 78.4877 3.36962 0.18498
JP.JKA.BHZ. 2018-11-06T16:23:33.80 10.0 positive automatic PcP 328 74.9958 -0.0388086 0
IU.PMSA.BHZ.00 2018-11-06T16:23:28.52 10.0 positive automatic P 156 78.03 -8.73223 0.166161
JP.JNU.BHZ. 2018-11-06T16:23:26.45 10.0 positive automatic P 315 76.1905 -0.547766 0.207402
MY.SBM.BHZ. 2018-11-06T16:23:25.22 10.0 positive automatic P 279 75.7258 0.924235 0.207275
II.ERM.BHZ.00 2018-11-06T16:23:22.87 10.0 positive automatic P 329 75.4021 0.462129 0.215394
JP.JTM.BHZ. 2018-11-06T16:23:22.70 10.0 positive automatic P 327 75.5142 -0.370042 0.177168
JP.JOW.BHZ. 2018-11-06T16:23:15.45 10.0 positive automatic P 309 74.1639 0.176955 0.228249
IU.MAJO.BHZ.00 2018-11-06T16:23:13.07 10.0 positive automatic P 322 73.9867 -1.20025 0.183243
JP.JMM.BHZ. 2018-11-06T16:23:10.75 10.0 positive automatic P 324 73.5059 -0.639526 0.229887
MY.LDM.BHZ. 2018-11-06T16:22:59.17 10.0 positive automatic P 284 71.1685 1.7232 0.254961
GE.JAGI.BHZ. 2018-11-06T16:22:48.02 10.0 positive automatic P 269 69.7758 -0.918829 0.270516
IU.QSPA.BHZ.00 2018-11-06T16:22:39.82 10.0 positive automatic P 180 67.6053 3.95627 0.30976
AU.MORW.BHZ. 2018-11-06T16:22:01.22 10.0 positive automatic P 248 62.2383 0.733702 0.375508
GE.MMRI.BHZ. 2018-11-06T16:21:59.77 10.0 positive automatic P 272 62.2399 -0.699809 0.371119
GE.SANI.BHZ. 2018-11-06T16:21:52.12 10.0 positive automatic P 280 61.3196 -2.12879 0.366533
GE.TNTI.BHZ. 2018-11-06T16:21:52.97 10.0 positive automatic P 284 61.2791 -1.00673 0.31765
IU.MBWA.BHZ.00 2018-11-06T16:21:49.85 10.0 positive automatic P 257 60.7515 -0.578034 0.410468
GE.SOEI.BHZ. 2018-11-06T16:21:45.67 10.0 positive automatic P 271 59.9712 0.438297 0.421834
IU.SBA.BHZ.00 2018-11-06T16:21:24.35 10.0 negative automatic P 185 56.2377 5.43877 0.440734
AU.MTN.BHZ. 2018-11-06T16:20:50.72 10.0 positive automatic P 271 52.5967 -1.71859 0.517955
AU.WRKA.BHZ. 2018-11-06T16:20:48.95 10.0 negative automatic P 255 52.2351 -0.89184 0.542902
AU.FORT.BHZ. 2018-11-06T16:20:44.92 10.0 negative automatic P 248 51.6893 -0.76826 0.538877
AU.KDU.BHZ. 2018-11-06T16:20:42.02 10.0 positive automatic P 271 51.4072 -1.54191 0.550054
NZ.KHZ.HHZ.10 2018-11-06T16:16:38.80 10.0 negative automatic P 204 22.493 0.732132 0.934579
AU.HTT.BHZ. 2018-11-06T16:19:33.17 10.0 negative automatic P 244 42.4294 -0.313712 0.692928
AU.COEN.BHZ. 2018-11-06T16:19:21.87 10.0 positive automatic P 274 41.1221 -0.84037 0.700782
IU.PMG.BHZ.00 2018-11-06T16:19:04.52 10.0 positive automatic P 283 39.1101 -1.45973 0.7298
AU.QLP.BHZ. 2018-11-06T16:18:49.90 10.0 positive automatic P 255 37.8134 -5.2047 0.790052
IU.CTAO.BHZ.00 2018-11-06T16:18:44.97 10.0 positive automatic P 266 36.7318 -0.974195 0.79277
G.CAN.BHZ.00 2018-11-06T16:18:27.15 10.0 positive automatic P 240 34.4238 0.973493 0.801444
AU.EIDS.BHZ. 2018-11-06T16:18:01.62 10.0 positive automatic P 258 31.7123 -0.791739 0.915655
AU.ARMA.BHZ. 2018-11-06T16:17:59.65 10.0 positive automatic P 248 31.4367 -0.492134 0.814842
NZ.ODZ.HHZ.10 2018-11-06T16:17:11.99 10.0 positive automatic P 205 25.8296 1.98522 0.934579
ND.KOUNC.BHZ.00 2018-11-06T16:16:11.52 10.0 positive automatic P 271 19.988 0.434714 0.930233
G.DZM.BHZ.00 2018-11-06T16:15:47.80 10.0 positive automatic P 267 17.8115 1.19408 0.909091
ND.ONTNC.BHZ.00 2018-11-06T16:15:47.04 10.0 positive automatic P 266 17.785 0.898417 0.740741
NZ.URZ.HHZ.10 2018-11-06T16:15:44.66 10.0 negative automatic P 203 17.5408 1.54272 0.966184
AU.NFK.BHZ. 2018-11-06T16:15:41.90 10.0 positive automatic P 244 17.3216 1.48558 0.720721
NZ.OUZ.HHZ.10 2018-11-06T16:15:35.19 10.0 negative automatic P 217 16.6549 3.18279 0.930233
II.MSVF.BHZ.00 2018-11-06T16:13:45.32 10.0 positive automatic P 301 8.519 3.2691 0.888889
IU.RAO.BHZ.00 2018-11-06T16:13:22.30 10.0 negative automatic P 205 7.6364 -7.51616 0.952381
AU.NIUE.BHZ. 2018-11-06T16:12:53.47 10.0 positive automatic P 52 5.2353 -3.37702 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