ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Mwp 6.0 on date 02-06-2018 and time 13:53:08 (Italy) in region Tonga Islands [Sea: Tonga]

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

  • 02-06-2018 11:53:08 (UTC)
  • 02-06-2018 13:53:08 (UTC +02:00) Italian time
  • 03-06-2018 00:53:08 (UTC +13:00) local time in the region of the earthquake (Pacific/Apia)

and geographic coordinates (lat, lon) -15.04, -173.25 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
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 5.2
Mwp 6.0

Mwpd 6.0
2018-06-02
11:53:08
-15.04 -173.25 20 2018-06-02
12:24:33
Sala Sismica INGV-Roma 57459591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-06-02 11:53:08
Latitude -15.04
Longitude -173.25
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 57459591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 18489
Semi-minor axis of confidence ellipse (meter) 5294
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 171
Circular confidence region, given by single value of horizontal uncertainty (meter) 15541.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 47.4587
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 43
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 2.52213
Epicentral distance of station closest to the epicenter (degree) 5.13835
Epicentral distance of station farthest from the epicenter (degree) 93.0421
Number of stations at which the event was observed 43
Number of stations from which data was used for origin computation 43
Magnitudes information

Mwpd:6

Field Value
Value 6
Uncertainty 0.1
Num. used stations 18
Type of magnitude Mwpd
Reference to an origin 57459591
Agency INGV
Autore Auto added
Time of creation (UTC) 2018-06-02 12:24:33

Mwp:6

Field Value
Value 6
Uncertainty 0.1
Num. used stations 19
Type of magnitude Mwp
Reference to an origin 57459591
Agency INGV
Autore Auto added
Time of creation (UTC) 2018-06-02 12:24:33

mb:5.2

Field Value
Value 5.2
Uncertainty 0.1
Num. used stations 39
Type of magnitude mb
Reference to an origin 57459591
Agency INGV
Autore Auto added
Time of creation (UTC) 2018-06-02 12:24:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.SNAA.BHZ. 2018-06-02T12:06:22.81 10.0 negative automatic P 177 93.0421 3.4387 0.0710621
II.JTS.BHZ.00 2018-06-02T12:06:12.52 10.0 positive automatic P 80 91.0388 2.50012 0.0717614
IU.TEIG.BHZ.00 2018-06-02T12:06:10.37 10.0 negative automatic P 69 90.5912 2.4811 0.0788468
US.ECSD.BHZ.00 2018-06-02T12:06:09.33 10.0 negative automatic P 45 91.0359 -0.705186 0.0642213
GT.PLCA.BHZ.00 2018-06-02T12:06:07.13 10.0 positive automatic P 132 89.515 4.09093 0.088987
C1.LL02.BHZ. 2018-06-02T12:05:58.88 10.0 positive automatic P 134 87.7978 4.04951 0.10024
CN.INK.BHZ. 2018-06-02T12:05:56.28 10.0 positive automatic P 14 88.0802 0.167771 0.110337
IU.HKT.BHZ.00 2018-06-02T12:05:52.05 10.0 negative automatic P 58 86.9757 1.3213 0.102522
US.WMOK.BHZ.00 2018-06-02T12:05:47.60 10.0 positive automatic P 53 86.2939 0.0626003 0.12414
IU.RSSD.BHZ.00 2018-06-02T12:05:47.02 10.0 positive automatic P 42 86.2506 -0.581805 0.118695
US.EGMT.BHZ.00 2018-06-02T12:05:38.83 10.0 positive automatic P 37 84.528 -0.00336202 0.127685
US.AMTX.BHZ.00 2018-06-02T12:05:37.53 10.0 negative automatic P 51 84.1418 0.664115 0.130693
IU.BILL.BHZ.00 2018-06-02T12:05:36.32 10.0 positive automatic P 353 84.392 -1.68975 0.114579
US.EGAK.BHZ.00 2018-06-02T12:05:33.45 10.0 positive automatic P 13 83.4568 0.215432 0.145954
US.SDCO.BHZ.00 2018-06-02T12:05:29.05 10.0 negative automatic P 48 82.5114 0.324114 0.140619
IU.COLA.BHZ.00 2018-06-02T12:05:25.80 10.0 negative automatic P 11 82.2078 -0.93564 0.156859
US.BW06.BHZ.00 2018-06-02T12:05:25.48 10.0 positive automatic P 42 82.0658 -0.861729 0.114124
IU.ANMO.BHZ.00 2018-06-02T12:05:19.27 10.0 positive automatic P 50 80.6009 0.76777 0.131775
US.MNTX.BHZ.00 2018-06-02T12:05:15.88 10.0 positive automatic P 53 80.0252 0.715531 0.152909
US.HLID.BHZ.00 2018-06-02T12:05:12.28 10.0 positive automatic P 39 79.4365 0.078359 0.156123
US.DUG.BHZ.00 2018-06-02T12:05:08.10 10.0 positive automatic P 43 78.6676 0.169413 0.169483
IU.FUNA.BHZ.00 2018-06-02T12:05:03.22 10.0 positive automatic ScP 311 9.847 -6.5988 0
US.ELK.BHZ.00 2018-06-02T12:05:00.88 10.0 negative automatic P 41 77.3938 -0.115533 0.182748
IU.TUC.BHZ.00 2018-06-02T12:04:54.00 10.0 negative automatic P 51 76.1942 0.996524 0.212303
US.WVOR.BHZ.00 2018-06-02T12:04:54.40 10.0 positive automatic P 38 76.25 0.00929893 0.181483
II.KDAK.BHZ.00 2018-06-02T12:04:46.32 10.0 positive automatic P 11 74.7969 0.466847 0.226907
BK.HUMO.BHZ.00 2018-06-02T12:04:40.80 10.0 negative automatic P 36 73.8324 0.492253 0.221454
JP.JNU.BHZ. 2018-06-02T12:04:26.95 10.0 positive automatic P 313 71.8169 -1.3896 0.259678
JP.JMN.BHZ. 2018-06-02T12:04:17.35 10.0 positive automatic P 315 70.0761 -0.423086 0.25551
IU.MAJO.BHZ.00 2018-06-02T12:04:08.72 10.0 positive automatic P 320 68.9482 -2.06295 0.251411
GT.VNDA.BHZ.00 2018-06-02T12:03:39.08 10.0 negative automatic P 186 63.7206 1.82207 0.355635
IU.SBA.BHZ.00 2018-06-02T12:03:39.30 10.0 positive automatic P 185 63.5926 2.90147 0.180792
AU.FORT.BHZ. 2018-06-02T12:02:38.90 10.0 positive automatic P 243 55.664 -2.87892 0.470157
AU.WRKA.BHZ. 2018-06-02T12:02:37.35 10.0 negative automatic P 250 55.4103 -2.68063 0.463126
AU.HTT.BHZ. 2018-06-02T12:01:33.80 10.0 positive automatic P 238 46.8334 -1.82984 0.621327
AU.TOO.BHZ. 2018-06-02T12:01:02.12 10.0 positive automatic P 230 42.803 -1.37016 0.647936
AU.COEN.BHZ. 2018-06-02T12:00:57.52 10.0 negative automatic P 266 42.1271 -0.419984 0.698521
AU.QLP.BHZ. 2018-06-02T12:00:47.85 10.0 positive automatic P 247 41.1678 -2.22797 0.724942
IU.CTAO.BHZ.00 2018-06-02T12:00:29.57 10.0 positive automatic P 257 38.8382 -1.18274 0.769865
G.PPTF.BHZ.00 2018-06-02T11:58:12.05 10.0 positive automatic P 100 22.8615 2.86127 0.754717
ND.MARNC.BHZ.00 2018-06-02T11:57:27.24 10.0 positive automatic P 247 18.8839 1.11128 0.784314
II.MSVF.BHZ.00 2018-06-02T11:55:17.57 10.0 positive automatic P 251 8.7653 4.81538 0.909091
AU.NIUE.BHZ. 2018-06-02T11:54:20.85 10.0 negative automatic P 142 5.1384 -1.99955 0.987654
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