Earthquake with magnitude of Mwp 6.0 on date 18-10-2021 and time 07:26:53 (UTC) in region Vanuatu Islands [Sea: Vanuatu]

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

  • 18-10-2021 07:26:53 (UTC)
  • 18-10-2021 09:26:53 (UTC +02:00) Italian time
  • 18-10-2021 18:26:53 (UTC +11:00) local time in the region of the earthquake (Pacific/Efate)

and geographic coordinates (lat, lon) -13.662, 166.957 at 106 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 adjourned progressively as more data become available. See http://shakemap.rm.ingv.it/ for additional information.

The red star indicates the epicenter. The red triangles show the stations of the INGV Italian National Seismic Network and the blue triangles those of the Nationa Accelerometric Network of the Dipartimento della Protezione Civile.

Intensity Shakemap

Intensity Shakemap

This map shows the distribution of the istrumentally derived intensities. To this purpose, it is used a conversion relation between ground acceleration and velocity, and the Mercalli Modificata (MMI - Modified Mercalli Intensity) scale. In general, the Mercalli intensity scale relies on the effects that the ground shaking produces as reported by an observer.
Peak ground acceleration Shakemap

Peak ground acceleration Shakemap

This map shows This map shows the distribution of peak ground acceleration expressed as per cent 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 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
Reviewed
Rev100
mb 5.5
Mwp 6.0

Mwpd 6.1
2021-10-18
07:26:53
-13.6617 166.957 105 2021-10-18
07:41:25
Sala Sismica INGV-Roma 96715481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-18 07:26:53
Latitude -13.6617
Longitude 166.9570
Depth (km) 105 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 96715481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 13988
Semi-minor axis of confidence ellipse (meter) 10926
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 95
Circular confidence region, given by single value of horizontal uncertainty (meter) 14205.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63.4119
Number of associated phases, regardless of their use for origin computation 67
Number of defining phases 67
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.91162
Epicentral distance of station closest to the epicenter (degree) 1.80118
Epicentral distance of station farthest from the epicenter (degree) 67.06414
Number of stations at which the event was observed 67
Number of stations from which data was used for origin computation 67
Magnitudes information

Mwpd:6.1

Field Value
Value 6.1
Uncertainty 0.2
Num. used stations 37
Type of magnitude Mwpd
Reference to an origin 96715481
Agency INGV
Autore early-est_ee1.2.4
Time of creation (UTC) 2021-10-18 07:41:25

Mwp:6

Field Value
Value 6
Uncertainty 0.1
Num. used stations 34
Type of magnitude Mwp
Reference to an origin 96715481
Agency INGV
Autore early-est_ee1.2.4
Time of creation (UTC) 2021-10-18 07:41:25

mb:5.5

Field Value
Value 5.5
Uncertainty 0.1
Num. used stations 47
Type of magnitude mb
Reference to an origin 96715481
Agency INGV
Autore early-est_ee1.2.4
Time of creation (UTC) 2021-10-18 07:41:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.BKNI.BHZ. 2021-10-18T07:37:33.92 10.0 positive automatic P 276 66.7214 1.16915 0.0940516
IU.PET.BHZ.00 2021-10-18T07:37:32.92 10.0 positive automatic P 355 67.0641 -0.856771 0.181953
AT.SMY.BHZ. 2021-10-18T07:37:31.08 10.0 positive automatic P 5 66.6751 -0.641964 0.19103
IU.YSS.BHZ.00 2021-10-18T07:37:16.20 10.0 positive automatic P 342 64.3819 -0.7537 0.18098
IU.CASY.BHZ.00 2021-10-18T07:37:16.12 10.0 positive automatic P 202 64.3752 -1.06824 0.197474
IU.SBA.BHZ.00 2021-10-18T07:37:15.92 10.0 positive automatic P 180 64.1848 -1.39556 0.208107
GE.MNAI.BHZ. 2021-10-18T07:37:14.12 10.0 positive automatic P 272 63.7226 1.28064 0.201539
GT.VNDA.BHZ.00 2021-10-18T07:37:13.40 10.0 positive automatic P 181 63.9059 -1.85662 0.0512613
RM.DLV.BHZ. 2021-10-18T07:37:12.42 10.0 positive automatic P 291 63.3726 1.15327 0.213475
IU.INCN.BHZ.00 2021-10-18T07:37:11.52 10.0 positive automatic P 325 63.6296 0.0217865 0.234906
JP.JKA.BHZ. 2021-10-18T07:37:00.30 10.0 positive automatic P 340 61.8955 -0.598013 0.223788
AU.XMI.BHZ. 2021-10-18T07:36:48.57 10.0 positive automatic P 266 59.8521 0.442768 0.236517
JP.JTU.BHZ. 2021-10-18T07:36:46.45 10.0 positive automatic P 325 59.9494 -1.99046 0.233008
JP.JTM.BHZ. 2021-10-18T07:36:42.95 10.0 positive automatic P 337 59.497 -1.30041 0.386092
IU.TATO.BHZ.00 2021-10-18T07:36:39.67 10.0 positive automatic P 311 58.7912 0.0618208 0.242281
JP.JSU.BHZ. 2021-10-18T07:36:27.45 10.0 positive automatic P 323 57.146 -0.156569 0.307951
JP.JMN.BHZ. 2021-10-18T07:36:25.90 10.0 positive automatic P 327 56.9066 -0.48439 0.0842412
IU.MAJO.BHZ.00 2021-10-18T07:36:24.27 10.0 positive automatic P 333 57.0577 -1.87821 0.257228
MY.SBM.BHZ. 2021-10-18T07:36:24.67 10.0 positive automatic P 282 56.6106 -0.0528975 0.26753
G.INU.BHZ.00 2021-10-18T07:36:22.96 10.0 positive automatic P 331 56.6154 -0.559891 0.267484
JP.JGF.BHZ. 2021-10-18T07:36:22.85 10.0 positive automatic P 331 56.6699 -1.12036 0.243756
JP.JOW.BHZ. 2021-10-18T07:36:14.75 10.0 positive automatic P 317 55.2335 0.0903256 0.281039
JP.JMZ.BHZ. 2021-10-18T07:35:56.10 10.0 positive automatic P 319 52.6132 0.716777 0.295656
GE.JAGI.BHZ. 2021-10-18T07:35:50.82 10.0 positive automatic P 270 51.987 1.00559 0.46778
MY.LDM.BHZ. 2021-10-18T07:35:50.92 10.0 positive automatic P 288 51.6488 0.96829 0.215338
AU.GIRL.BHZ.00 2021-10-18T07:35:42.63 10.0 positive automatic P 252 50.6446 1.66197 0.359989
AU.MORW.BHZ. 2021-10-18T07:35:31.00 10.0 positive automatic P 243 49.441 0.815985 0.561571
IU.NWAO.BHZ.00 2021-10-18T07:35:28.30 10.0 positive automatic P 238 49.0236 0.261297 0.569435
IU.MBWA.BHZ.00 2021-10-18T07:35:02.35 10.0 positive automatic P 254 45.5178 1.32891 0.418836
GE.LUWI.BHZ. 2021-10-18T07:35:02.47 10.0 positive automatic P 282 45.4923 1.38016 0.21135
GE.MMRI.BHZ. 2021-10-18T07:34:50.42 10.0 positive automatic P 272 44.1008 0.774941 0.255965
GE.SANI.BHZ. 2021-10-18T07:34:35.32 10.0 positive automatic P 282 42.1234 1.80112 0.483278
GE.SOEI.BHZ. 2021-10-18T07:34:34.52 10.0 positive automatic P 271 41.9308 1.42264 0.289873
G.PPTF.BHZ.00 2021-10-18T07:34:34.25 10.0 positive automatic P 101 41.9661 -0.590008 0.464753
GE.TNTI.BHZ. 2021-10-18T07:34:32.77 10.0 positive automatic P 287 41.7903 1.40651 0.448295
AU.FORT.BHZ.00 2021-10-18T07:34:13.43 10.0 positive automatic P 238 39.5913 -0.164251 0.815372
IU.XMAS.BHZ.00 2021-10-18T07:34:05.50 10.0 positive automatic P 69 38.6284 -1.34026 0.548556
AU.WRKA.BHZ.00 2021-10-18T07:34:00.38 10.0 positive automatic P 247 38.0531 -0.456986 0.862104
GE.BNDI.BHZ. 2021-10-18T07:33:57.12 10.0 positive automatic P 280 37.6525 -0.242403 0.623065
GE.FAKI.BHZ. 2021-10-18T07:33:42.77 10.0 positive automatic P 284 35.9223 0.351795 0.922842
AU.MTN.BHZ.00 2021-10-18T07:33:34.10 10.0 positive automatic P 267 34.847 0.593492 0.993163
II.TAU.BHZ.00 2021-10-18T07:33:23.97 10.0 positive automatic P 206 33.7844 -0.833159 0.75134
AU.KDU.BHZ.00 2021-10-18T07:33:22.88 10.0 positive automatic P 268 33.5617 0.485018 0.522197
IU.RAR.BHZ.00 2021-10-18T07:33:15.37 10.0 positive automatic P 108 32.5558 0.586339 0.738783
AU.HTT.BHZ. 2021-10-18T07:33:11.15 10.0 positive automatic P 227 32.2294 0.379762 1.15602
II.WRAB.BHZ.00 2021-10-18T07:33:06.05 10.0 positive automatic P 254 31.7737 0.00860033 1.1349
NZ.ODZ.HHZ.10 2021-10-18T07:33:03.98 10.0 positive automatic P 175 31.5369 0.0183949 0.84223
NZ.KHZ.HHZ.10 2021-10-18T07:32:43.57 10.0 positive automatic P 170 29.3112 -0.29585 0.239234
GE.GENI.BHZ. 2021-10-18T07:32:39.62 10.0 positive automatic P 290 28.691 -1.02103 0.909091
AU.MILA.BHZ.00 2021-10-18T07:32:35.50 10.0 positive automatic P 211 28.2753 -0.532451 0.898876
G.CAN.BHZ.00 2021-10-18T07:32:24.60 10.0 positive automatic P 214 27.0284 -0.71973 0.869565
AU.QLP.BHZ. 2021-10-18T07:32:05.67 10.0 positive automatic P 235 24.8731 0.523466 1.11517
AU.RIV.BHZ. 2021-10-18T07:32:04.57 10.0 positive automatic P 213 24.7418 -0.6726 0.898876
AU.MANU.BHZ.00 2021-10-18T07:31:44.48 10.0 positive automatic P 299 22.5864 0.133475 0.456116
NZ.OUZ.HHZ.10 2021-10-18T07:31:42.68 10.0 positive automatic P 166 22.3724 -0.289984 0.930233
PS.PATS.BHZ. 2021-10-18T07:31:38.91 10.0 positive automatic P 337 22.2205 -1.56286 0.798869
AU.ARMA.BHZ. 2021-10-18T07:31:37.92 10.0 positive automatic P 218 21.915 0.0358331 1.44394
IU.CTAO.BHZ.00 2021-10-18T07:31:26.55 10.0 positive automatic P 249 20.8051 0.2164 1.44449
IU.AFI.BHZ.00 2021-10-18T07:31:24.02 10.0 positive automatic P 93 20.6468 0.583777 0.989478
AU.LHI.BHZ.00 2021-10-18T07:31:09.03 10.0 positive automatic P 201 19.2707 0.154288 1.01487
AU.EIDS.BHZ. 2021-10-18T07:31:07.57 10.0 positive automatic P 230 18.9657 1.64917 1.47963
AU.RABL.BHZ.00 2021-10-18T07:30:47.05 10.0 positive automatic P 302 17.3978 -1.36523 0.930233
IU.FUNA.BHZ.00 2021-10-18T07:29:54.65 10.0 positive automatic P 68 13.0573 0.782327 0.869565
II.MSVF.BHZ.00 2021-10-18T07:29:34.87 10.0 positive automatic P 112 11.4312 1.48954 1.27968
IU.HNR.BHZ.00 2021-10-18T07:28:48.15 10.0 positive automatic P 301 8.0601 0.900385 0.595601
ND.KOUNC.BHZ.00 2021-10-18T07:28:36.15 10.0 positive automatic P 200 7.3457 -0.985971 2.73822
G.SANVU.BHZ.00 2021-10-18T07:27:21.05 10.0 positive automatic P 172 1.8012 -0.553791 2.81817
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