Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Mwp 6.0 on date 28-09-2023 and time 16:40:34 (Italy) in region Vanuatu Islands [Sea: Vanuatu]

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

  • 28-09-2023 14:40:34 (UTC)
  • 28-09-2023 16:40:34 (UTC +02:00) Italian time
  • 29-09-2023 01:40:34 (UTC +11:00) local time in the region of the earthquake (Pacific/Efate)

and geographic coordinates (lat, lon) -15.6730, 167.8150 at 196 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		mb 5.2
Mwp 6.0
Mwpd 6.0 		2023-09-28
14:40:34		 -15.6727 167.815 196 2023-09-28
14:53:51		 Sala Sismica INGV-Roma 121543121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-28 14:40:34
Latitude -15.6727
Longitude 167.8150
Depth (km) 196 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 121543121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 17596840
Semi-minor axis of confidence ellipse (meter) 4944109
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 324
Circular confidence region, given by single value of horizontal uncertainty (meter) 14549900.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 61.0255
Number of associated phases, regardless of their use for origin computation 57
Number of defining phases 57
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.992797
Epicentral distance of station closest to the epicenter (degree) 10.02006
Epicentral distance of station farthest from the epicenter (degree) 71.37685
Number of stations at which the event was observed 57
Number of stations from which data was used for origin computation 57
Magnitudes information

Mwp:6.0

Field Value
Value 6.0
Uncertainty 0.1
Num. used stations 21
Type of magnitude Mwp
Reference to an origin 121543121
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-09-28 14:53:51

Mwpd:6.0

Field Value
Value 6.0
Uncertainty 0.2
Num. used stations 23
Type of magnitude Mwpd
Reference to an origin 121543121
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-09-28 14:53:51

mb:5.2

Field Value
Value 5.2
Uncertainty 0.2
Num. used stations 51
Type of magnitude mb
Reference to an origin 121543121
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-09-28 14:53:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GE.GSI.BHZ. 2023-09-28T14:51:32.47 10.0 positive automatic P 277 7922.8359 0.867439 0.160627
IU.PET.BHZ.00 2023-09-28T14:51:16.22 10.0 positive automatic P 354 7675.3059 -0.806701 0.296146
IU.YSS.BHZ.00 2023-09-28T14:51:01.50 10.0 positive automatic P 342 7387.2054 0.170914 0.259299
MY.KOM.BHZ. 2023-09-28T14:50:56.17 10.0 positive automatic P 279 7275.7281 0.51995 0.182193
IU.INCN.BHZ.00 2023-09-28T14:50:56.22 10.0 positive automatic P 325 7298.583 0.491015 0.319728
RM.DLV.BHZ. 2023-09-28T14:50:52.52 10.0 positive automatic P 292 7201.5357 0.986812 0.190099
PS.TJN.BHZ. 2023-09-28T14:50:47.81 10.0 positive automatic P 325 7165.0944 -1.02527 0.336299
JP.JKA.BHZ. 2023-09-28T14:50:45.40 10.0 positive automatic P 340 7111.6035 -0.341945 0.190701
IU.CASY.BHZ.00 2023-09-28T14:50:38.57 10.0 positive automatic P 202 6973.4529 1.02625 0.283605
IU.SBA.BHZ.00 2023-09-28T14:50:35.60 10.0 positive automatic P 180 6901.5471 0.937098 0.255434
JP.JTU.BHZ. 2023-09-28T14:50:31.20 10.0 positive automatic P 325 6889.6479 -2.09402 0.198865
JP.JTM.BHZ. 2023-09-28T14:50:28.80 10.0 positive automatic P 337 6845.6253 -0.74474 0.225411
IU.TATO.BHZ.00 2023-09-28T14:50:23.32 10.0 positive automatic P 311 6741.9846 -0.204099 0.212187
JP.YOJ.BHZ. 2023-09-28T14:50:13.75 10.0 positive automatic P 312 6586.6512 -0.248969 0.217585
JP.JSU.BHZ. 2023-09-28T14:50:12.50 10.0 positive automatic P 323 6576.8166 -0.352582 0.258849
JP.JMN.BHZ. 2023-09-28T14:50:11.35 10.0 positive automatic P 327 6554.1504 -0.562923 0.24019
G.INU.BHZ.00 2023-09-28T14:50:09.01 10.0 positive automatic P 331 6524.0916 -0.230053 0.242409
JP.JGF.BHZ. 2023-09-28T14:50:08.85 10.0 positive automatic P 331 6530.3409 -0.861205 0.203993
PS.ISG.BHZ. 2023-09-28T14:50:07.96 10.0 positive automatic P 313 6483.6654 0.205941 0.251286
MY.SBM.BHZ. 2023-09-28T14:50:04.97 10.0 positive automatic P 283 6422.9262 0.764893 0.244422
JP.JOW.BHZ. 2023-09-28T14:49:59.80 10.0 positive automatic P 318 6357.5472 -0.0334515 0.255278
GE.JAGI.BHZ. 2023-09-28T14:49:28.22 10.0 positive automatic P 271 5864.7294 1.29514 0.280427
IU.POHA.BHZ.00 2023-09-28T14:49:12.52 10.0 positive automatic P 47 5608.7523 0.763583 0.33986
G.KIP.BHZ.00 2023-09-28T14:49:07.67 10.0 positive automatic P 43 5548.8234 0.176109 0.335129
AU.MORW.BHZ. 2023-09-28T14:49:02.45 10.0 positive automatic P 245 5473.2102 1.26163 0.356905
JP.JCJ.BHZ. 2023-09-28T14:49:00.85 10.0 positive automatic P 330 5491.6029 -0.823319 0.326944
IU.NWAO.BHZ.00 2023-09-28T14:48:57.57 10.0 positive automatic P 240 5404.9341 1.01902 0.361625
II.KAPI.BHZ.00 2023-09-28T14:48:55.85 10.0 positive automatic P 277 5366.3283 1.34131 0.181266
IU.MBWA.BHZ.00 2023-09-28T14:48:35.77 10.0 positive automatic P 256 5081.9019 1.50841 0.390476
GE.SANI.BHZ. 2023-09-28T14:48:16.17 10.0 positive automatic P 284 4816.3788 1.16898 0.455428
G.PPTF.BHZ.00 2023-09-28T14:47:58.30 10.0 positive automatic P 99 4528.4226 1.64112 0.515203
AU.FITZ.BHZ. 2023-09-28T14:47:51.75 10.0 positive automatic P 260 4478.1618 1.09911 0.520638
PS.KOR.BHZ. 2023-09-28T14:47:50.96 10.0 positive automatic P 302 4467.5835 0.557785 0.494046
AU.FORT.BHZ.00 2023-09-28T14:47:42.93 10.0 positive automatic P 240 4358.748 0.570858 0.569669
GE.FAKI.BHZ. 2023-09-28T14:47:25.22 10.0 positive automatic P 286 4135.1718 0.0255962 0.603513
AU.MTN.BHZ.00 2023-09-28T14:47:11.38 10.0 positive automatic P 270 3953.8755 -0.368358 0.617091
AU.KDU.BHZ.00 2023-09-28T14:47:00.10 10.0 positive automatic P 270 3813.4494 -0.816877 0.744292
IU.RAR.BHZ.00 2023-09-28T14:46:36.30 10.0 positive automatic P 105 3461.3685 1.7467 0.763747
AU.HTT.BHZ.00 2023-09-28T14:46:36.78 10.0 positive automatic P 230 3500.0853 0.211445 0.872927
PS.JAY.BHZ. 2023-09-28T14:46:19.36 10.0 positive automatic P 294 3303.9816 -1.64231 0.727273
AU.TOO.BHZ.00 2023-09-28T14:46:18.50 10.0 positive automatic P 218 3270.5817 0.124063 0.941176
AU.MILA.BHZ.00 2023-09-28T14:45:57.25 10.0 positive automatic P 214 3000.0414 0.438914 0.91954
NZ.KHZ.HHZ.10 2023-09-28T14:45:56.97 10.0 positive automatic P 171 3018.0789 0.125026 0.97561
IU.SNZO.BHZ.00 2023-09-28T14:45:49.92 10.0 positive automatic P 168 2921.2869 0.852245 0.869565
G.CAN.BHZ.00 2023-09-28T14:45:46.35 10.0 positive automatic P 217 2871.3591 -0.466362 0.930233
AU.QLP.BHZ. 2023-09-28T14:45:33.95 10.0 positive automatic P 240 2718.3345 0.283678 0.869688
PS.PATS.BHZ. 2023-09-28T14:45:32.16 10.0 positive automatic P 337 2707.9116 -0.873266 0.851064
AU.COEN.BHZ.00 2023-09-28T14:45:27.90 10.0 positive automatic P 271 2649.3591 -0.392537 0.496309
AU.RIV.BHZ. 2023-09-28T14:45:25.92 10.0 positive automatic P 217 2614.9602 -0.609237 0.952381
AU.NIUE.BHZ.00 2023-09-28T14:45:04.83 10.0 positive automatic P 102 2386.1115 -1.37191 0.91954
AU.ARMA.BHZ. 2023-09-28T14:44:59.95 10.0 positive automatic P 222 2320.6659 -0.668908 0.930233
IU.CTAO.BHZ.00 2023-09-28T14:44:59.80 10.0 positive automatic P 255 2327.6589 -1.74291 0.930233
NZ.OUZ.HHZ.10 2023-09-28T14:44:53.37 10.0 positive automatic P 166 2244.4311 -0.281791 0.947867
AU.EIDS.BHZ. 2023-09-28T14:44:33.32 10.0 positive automatic P 236 2042.3112 -0.184211 1.51909
AU.NFK.BHZ.00 2023-09-28T14:43:36.84 10.0 positive automatic P 180 1484.1255 1.85172 0.909091
IU.FUNA.BHZ.00 2023-09-28T14:43:31.45 10.0 positive automatic P 59 1467.1869 -1.47603 0.909091
II.MSVF.BHZ.00 2023-09-28T14:42:53.50 10.0 positive automatic P 103 1112.2311 0.334695 0.952381
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