Earthquake with magnitude of Mwp 6.2 on date 02-04-2018 and time 07:57:37 (Italy) in region Tonga [Sea]

A magnitude Mwp 6.2 earthquake occured in region: Tonga [Sea], on

  • 02-04-2018 05:57:37 (UTC)
  • 02-04-2018 07:57:37 (UTC +02:00) Italian time
  • 02-04-2018 18:57:37 (UTC +13:00) local time in the region of the earthquake (Pacific/Tongatapu)

and geographic coordinates (lat, lon) -24.78, -176.74 at 112 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 5.5
Mwp 6.2

Mwpd 6.3
2018-04-02
05:57:37
-24.79 -176.74 112 2018-04-02
06:23:15
Sala Sismica INGV-Roma 55036171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-04-02 05:57:37
Latitude -24.79
Longitude -176.74
Depth (km) 112 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 55036171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 12265
Semi-minor axis of confidence ellipse (meter) 11643
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 240
Circular confidence region, given by single value of horizontal uncertainty (meter) 12368.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100.61
Number of associated phases, regardless of their use for origin computation 64
Number of defining phases 64
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 2.3372
Epicentral distance of station closest to the epicenter (degree) 4.5843
Epicentral distance of station farthest from the epicenter (degree) 83.07814
Number of stations at which the event was observed 56
Number of stations from which data was used for origin computation 56
Magnitudes information

Mwpd:6.3

Field Value
Value 6.3
Uncertainty 0.1
Num. used stations 17
Type of magnitude Mwpd
Reference to an origin 55036171
Agency INGV
Autore Auto added
Time of creation (UTC) 2018-04-02 06:23:16

Mwp:6.2

Field Value
Value 6.2
Uncertainty 0.1
Num. used stations 22
Type of magnitude Mwp
Reference to an origin 55036171
Agency INGV
Autore Auto added
Time of creation (UTC) 2018-04-02 06:23:16

mb:5.5

Field Value
Value 5.5
Uncertainty 0.1
Num. used stations 36
Type of magnitude mb
Reference to an origin 55036171
Agency INGV
Autore Auto added
Time of creation (UTC) 2018-04-02 06:23:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.BKNI.BHZ. 2018-04-02T06:09:47.82 10.0 positive automatic P 274 83.0781 -1.63308 0
IU.SLBS.BHZ.00 2018-04-02T06:09:41.72 10.0 positive automatic PcP 58 80.8347 -2.40933 0
IU.INCN.BHZ.00 2018-04-02T06:09:41.62 10.0 negative automatic P 318 81.883 -1.63272 0
IU.YSS.BHZ.00 2018-04-02T06:09:34.90 10.0 negative automatic P 333 80.5121 -1.11352 0.110002
IU.PET.BHZ.00 2018-04-02T06:09:35.42 10.0 negative automatic P 345 80.6988 -1.58689 0.164607
GE.MNAI.BHZ. 2018-04-02T06:09:30.72 10.0 positive automatic P 270 79.3773 0.812659 0.180846
IU.ADK.BHZ.00 2018-04-02T06:09:13.02 10.0 positive automatic P 0 76.6641 -1.88785 0.202675
JP.JNU.BHZ. 2018-04-02T06:09:11.40 10.0 negative automatic P 317 76.4069 -2.12803 0.196113
JP.JSD.BHZ. 2018-04-02T06:09:06.95 10.0 negative automatic P 325 75.6834 -2.40697 0
JP.JMN.BHZ. 2018-04-02T06:09:04.80 10.0 positive automatic P 319 75.0038 -0.742642 0
AU.XMI.BHZ. 2018-04-02T06:09:02.25 10.0 negative automatic P 265 74.4431 -0.0159425 0.230682
JP.JMM.BHZ. 2018-04-02T06:09:01.60 10.0 positive automatic P 326 74.2557 0.451252 0.227283
IU.MAJO.BHZ.00 2018-04-02T06:09:00.72 10.0 negative automatic P 324 74.5949 -2.4393 0.204691
JP.JGF.BHZ. 2018-04-02T06:08:59.05 10.0 positive automatic P 323 74.359 -2.77941 0.216145
JP.JOW.BHZ. 2018-04-02T06:08:58.90 10.0 positive automatic P 311 74.0041 -0.808235 0
MY.KKM.BHZ. 2018-04-02T06:08:46.72 10.0 negative automatic P 286 72.063 -1.66041 0.220189
GE.JAGI.BHZ. 2018-04-02T06:08:18.47 10.0 negative automatic P 271 67.5439 -2.1137 0.283521
IU.QSPA.BHZ.00 2018-04-02T06:08:07.52 10.0 negative automatic P 180 65.1566 1.69239 0.325411
AU.GIRL.BHZ. 2018-04-02T06:07:48.85 10.0 positive automatic P 256 62.528 0.715693 0.389928
IU.TARA.BHZ.00 2018-04-02T06:07:45.02 10.0 positive automatic S 338 27.995 -6.50616 0
IU.CASY.BHZ.00 2018-04-02T06:07:34.07 10.0 negative automatic P 206 60.5095 -0.474462 0.368979
GE.SANI.BHZ. 2018-04-02T06:07:26.52 10.0 negative automatic P 283 59.6339 -2.05616 0.416633
AU.MORW.BHZ. 2018-04-02T06:07:24.75 10.0 positive automatic P 250 59.2745 -1.40827 0.412013
GE.SOEI.BHZ. 2018-04-02T06:07:16.57 10.0 negative automatic P 274 57.8624 0.0835353 0.371726
IU.MBWA.BHZ.00 2018-04-02T06:07:16.57 10.0 positive automatic P 260 58.081 -1.29875 0.414611
IU.NWAO.BHZ.00 2018-04-02T06:07:12.97 10.0 positive automatic P 245 57.4818 -0.737112 0.418317
IU.SBA.BHZ.00 2018-04-02T06:06:49.22 10.0 negative automatic P 184 53.6241 3.15649 0.507658
GT.VNDA.BHZ.00 2018-04-02T06:06:48.95 10.0 positive automatic P 186 53.6985 2.33195 0.506476
AU.MTN.BHZ. 2018-04-02T06:06:19.37 10.0 positive automatic P 274 50.4619 -3.28234 0.559162
G.KIP.BHZ.00 2018-04-02T06:06:17.62 10.0 positive automatic P 23 49.6563 1.04829 0.57268
AU.WRKA.BHZ. 2018-04-02T06:06:13.25 10.0 positive automatic P 257 49.4856 -2.11725 0.589605
AU.KDU.BHZ. 2018-04-02T06:06:11.30 10.0 positive automatic P 274 49.3066 -2.60768 0.571792
AU.FORT.BHZ. 2018-04-02T06:06:07.40 10.0 negative automatic P 250 48.7257 -2.09684 0.588499
AU.HTT.BHZ. 2018-04-02T06:04:53.92 10.0 positive automatic P 247 39.3889 -1.17086 0.787239
AU.COEN.BHZ. 2018-04-02T06:04:51.77 10.0 positive automatic P 278 39.1763 -1.48402 0.781875
G.TAOE.BHZ.00 2018-04-02T06:04:49.96 10.0 positive automatic P 72 38.2947 3.9753 0.795693
AU.QLP.BHZ. 2018-04-02T06:04:17.97 10.0 positive automatic P 258 35.0818 -0.66347 0.865756
AU.TOO.BHZ. 2018-04-02T06:04:13.25 10.0 negative automatic P 239 34.4697 -0.193851 0.828163
IU.CTAO.BHZ.00 2018-04-02T06:04:12.97 10.0 negative automatic P 270 34.4234 -0.0273794 0.858697
IU.XMAS.BHZ.00 2018-04-02T06:04:00.30 10.0 positive automatic P 38 32.7095 2.21383 0.916309
AU.MILA.BHZ. 2018-04-02T06:03:48.22 10.0 negative automatic P 239 31.5117 0.486154 0.888218
G.CAN.BHZ.00 2018-04-02T06:03:45.75 10.0 positive automatic P 242 31.2871 0.00664265 0.844339
AU.EIDS.BHZ. 2018-04-02T06:03:26.02 10.0 negative automatic P 262 29.082 -0.192967 0.824742
AU.ARMA.BHZ. 2018-04-02T06:03:21.75 10.0 positive automatic P 251 28.4959 0.574265 0.879121
G.PPTF.BHZ.00 2018-04-02T06:03:04.75 10.0 negative automatic pP 79 26.2817 3.41664 0.909091
AU.LHI.BHZ. 2018-04-02T06:02:26.52 10.0 negative automatic P 247 22.3194 1.77992 0.610687
NZ.ODZ.HHZ.10 2018-04-02T06:02:24.24 10.0 positive automatic P 204 22.6834 -4.32191 0.925926
ND.KOUNC.BHZ.00 2018-04-02T06:01:39.99 10.0 negative automatic P 280 17.9977 1.77463 0.888889
G.DZM.BHZ.00 2018-04-02T06:01:12.70 10.0 negative automatic P 277 15.6581 1.90247 0.952381
ND.ONTNC.BHZ.00 2018-04-02T06:01:11.80 10.0 negative automatic P 276 15.5964 1.90553 0.869565
AU.NFK.BHZ. 2018-04-02T06:00:56.80 10.0 positive automatic P 249 14.2988 3.24569 0.909091
ND.MARNC.BHZ.00 2018-04-02T06:00:55.89 10.0 positive automatic P 280 14.3828 1.29902 0
NZ.OUZ.HHZ.10 2018-04-02T06:00:43.46 10.0 positive automatic P 216 13.3627 1.99278 0.943396
II.MSVF.BHZ.00 2018-04-02T05:59:38.17 10.0 positive automatic P 324 8.5495 0.832991 0.909091
AU.NIUE.BHZ. 2018-04-02T05:59:31.47 10.0 positive automatic P 49 8.5105 -5.21804 0.909091
IU.RAO.BHZ.00 2018-04-02T05:58:41.62 10.0 positive automatic P 193 4.5843 -1.89135 0.869565
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