Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Mwp 6.4 on date 08-09-2023 and time 11:09:54 (Italy) in region New Zealand [Sea]

A magnitude Mwp 6.4 earthquake occured in region: New Zealand [Sea], on

  • 08-09-2023 09:09:54 (UTC)
  • 08-09-2023 11:09:54 (UTC +02:00) Italian time
  • 08-09-2023 21:09:54 (UTC +12:00) local time in the region of the earthquake (Pacific/Auckland)

and geographic coordinates (lat, lon) -33.0890, -178.6430 at 80 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.

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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 5.6
Mwp 6.4
Mwpd 6.4 		2023-09-08
09:09:54		 -33.0891 -178.643 80 2023-09-08
09:22:51		 Sala Sismica INGV-Roma 120872331
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-08 09:09:54
Latitude -33.0891
Longitude -178.6430
Depth (km) 80 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 120872331

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 50003551
Semi-minor axis of confidence ellipse (meter) 20940543
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 101
Circular confidence region, given by single value of horizontal uncertainty (meter) 43913500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 177.438
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 47
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.76018
Epicentral distance of station closest to the epicenter (degree) 3.89210
Epicentral distance of station farthest from the epicenter (degree) 66.39277
Number of stations at which the event was observed 47
Number of stations from which data was used for origin computation 47
Magnitudes information

Mwp:6.4

Field Value
Value 6.4
Uncertainty 0.2
Num. used stations 28
Type of magnitude Mwp
Reference to an origin 120872331
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-09-08 09:22:51

Mwpd:6.4

Field Value
Value 6.4
Uncertainty 0.3
Num. used stations 35
Type of magnitude Mwpd
Reference to an origin 120872331
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-09-08 09:22:51

mb:5.6

Field Value
Value 5.6
Uncertainty 0.2
Num. used stations 35
Type of magnitude mb
Reference to an origin 120872331
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-09-08 09:22:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IU.DAV.BHZ.00 2023-09-08T09:20:32.47 10.0 positive automatic P 296 7369.6008 -1.39737 0.189868
GE.JAGI.BHZ. 2023-09-08T09:20:32.02 10.0 positive automatic P 275 7362.2526 -0.171623 0.257861
GE.TNTI.BHZ. 2023-09-08T09:19:56.57 10.0 positive automatic P 292 6768.0363 -1.01111 0.191104
GE.SANI.BHZ. 2023-09-08T09:19:52.22 10.0 positive automatic P 289 6693.8217 -0.282277 0.286536
AU.GIRL.BHZ.00 2023-09-08T09:19:47.45 10.0 positive automatic P 262 6580.2354 0.791614 0.261208
G.KIP.BHZ.00 2023-09-08T09:19:39.75 10.0 positive automatic P 23 6432.9717 0.831543 0.216698
IU.GUMO.BHZ.00 2023-09-08T09:19:37.20 10.0 positive automatic P 317 6463.6521 -2.17665 0.162213
IU.POHA.BHZ.00 2023-09-08T09:19:35.45 10.0 positive automatic P 26 6356.7147 1.29679 0.241442
IU.MBWA.BHZ.00 2023-09-08T09:19:18.25 10.0 positive automatic P 266 6145.0155 -0.136849 0.279903
AU.MORW.BHZ. 2023-09-08T09:19:17.45 10.0 positive automatic P 255 6124.314 0.444479 0.45972
GE.FAKI.BHZ. 2023-09-08T09:19:13.92 10.0 positive automatic P 293 6089.3268 -0.357239 0.439062
IU.WAKE.BHZ.00 2023-09-08T09:19:09.07 10.0 positive automatic P 343 6018.5532 -1.75631 0.310805
IU.CASY.BHZ.00 2023-09-08T09:19:00.02 10.0 positive automatic P 209 5812.9701 2.30255 0.476489
IU.NWAO.BHZ.00 2023-09-08T09:18:59.60 10.0 positive automatic P 251 5867.4156 -0.582187 0.29089
AU.FITZ.BHZ. 2023-09-08T09:18:52.78 10.0 positive automatic P 272 5751.3207 0.278453 0.480577
AU.MTN.BHZ.00 2023-09-08T09:18:37.70 10.0 positive automatic P 282 5539.9212 -1.15965 0.254964
AU.KDU.BHZ.00 2023-09-08T09:18:30.03 10.0 positive automatic P 283 5427.5559 -1.11517 0.554551
PS.JAY.BHZ. 2023-09-08T09:18:29.21 10.0 positive automatic P 300 5414.2581 -1.07692 0.201533
AU.FORT.BHZ.00 2023-09-08T09:17:58.68 10.0 positive automatic P 258 4972.5669 -0.531926 0.639884
II.KWJN.BHZ.00 2023-09-08T09:17:54.22 10.0 positive automatic P 340 4925.2365 -1.56144 0.366079
AU.COEN.BHZ.00 2023-09-08T09:17:17.05 10.0 positive automatic P 290 4392.4698 0.290238 0.145805
AU.RABL.BHZ.00 2023-09-08T09:17:16.03 10.0 positive automatic P 310 4407.0441 -1.82309 0.641523
GE.PMG.BHZ.00 2023-09-08T09:17:14.47 10.0 positive automatic P 299 4372.0236 -0.761602 0.595368
AU.HTT.BHZ.00 2023-09-08T09:16:40.88 10.0 positive automatic P 257 3910.641 0.720432 0.909309
IU.CTAO.BHZ.00 2023-09-08T09:16:27.92 10.0 positive automatic P 284 3748.5144 -0.00697122 0.976142
AU.QLP.BHZ. 2023-09-08T09:16:18.65 10.0 positive automatic P 272 3626.9916 0.857701 0.893046
IU.HNR.BHZ.00 2023-09-08T09:16:00.52 10.0 positive automatic P 315 3418.4004 -0.573394 0.905147
AU.TOO.BHZ.00 2023-09-08T09:15:51.45 10.0 positive automatic P 251 3265.6755 2.08881 1.17977
AU.EIDS.BHZ. 2023-09-08T09:15:31.97 10.0 positive automatic P 278 3043.0317 0.400255 1.1647
AU.MCQ.BHZ.00 2023-09-08T09:15:27.18 10.0 positive automatic P 210 2950.6686 3.19719 0.733945
G.CAN.BHZ.00 2023-09-08T09:15:27.60 10.0 positive automatic P 256 2967.7848 1.72272 1.27458
AU.MILA.BHZ.00 2023-09-08T09:15:26.30 10.0 positive automatic P 252 2943.9531 2.73352 0.879121
AU.ARMA.BHZ. 2023-09-08T09:15:15.02 10.0 positive automatic P 268 2811.9741 1.68391 1.17026
AU.RIV.BHZ. 2023-09-08T09:15:12.52 10.0 positive automatic P 260 2787.5763 0.75029 1.21358
IU.FUNA.BHZ.00 2023-09-08T09:15:04.50 10.0 positive automatic P 355 2735.3841 -1.92487 0.91954
ND.KOUNC.BHZ.00 2023-09-08T09:14:17.05 10.0 positive automatic P 305 2184.4023 0.266055 1.36487
AU.LHI.BHZ.00 2023-09-08T09:14:09.23 10.0 positive automatic P 269 2094.9807 1.98201 0.620489
ND.ONTNC.BHZ.00 2023-09-08T09:13:46.25 10.0 positive automatic P 306 1887.5994 -0.106948 1.29328
ND.MARNC.BHZ.00 2023-09-08T09:13:40.70 10.0 positive automatic P 311 1837.383 0.0196234 1.31269
AU.NIUE.BHZ.00 2023-09-08T09:13:35.05 10.0 positive automatic P 31 1779.6963 1.04381 1.41175
II.MSVF.BHZ.00 2023-09-08T09:13:27.65 10.0 positive automatic P 348 1734.7302 -2.13482 0.91954
NZ.ODZ.HHZ.10 2023-09-08T09:13:09.13 10.0 positive automatic P 212 1613.3295 -4.08221 0.980392
AU.NFK.BHZ.00 2023-09-08T09:12:44.60 10.0 positive automatic P 286 1351.203 0.875317 0.924638
NZ.KHZ.HHZ.10 2023-09-08T09:12:24.47 10.0 positive automatic P 211 1240.6803 -3.803 0.961555
IU.SNZO.BHZ.00 2023-09-08T09:12:06.05 10.0 positive automatic P 211 1084.692 -4.04953 1.00789
NZ.OUZ.HHZ.10 2023-09-08T09:11:32.31 10.0 positive automatic P 249 750.804 0.355752 1.73082
IU.RAO.BHZ.00 2023-09-08T09:10:50.60 10.0 positive automatic Pg 9 432.0231 0.284492 2.73362
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