Earthquake with magnitude of Mwpd 7.3 on date 04-03-2021 and time 13:27:38 (UTC) in region Off east coast of North Island, New Zealand [Sea: New Zealand]

A magnitude Mwpd 7.3 earthquake occured in region: Off east coast of North Island, New Zealand [Sea: New Zealand], on

  • 04-03-2021 13:27:38 (UTC)
  • 04-03-2021 14:27:38 (UTC +01:00) Italian time
  • 05-03-2021 02:27:38 (UTC +13:00) local time in the region of the earthquake (Pacific/Auckland)

and geographic coordinates (lat, lon) -37.03, 179.42 at 14 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
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
Reviewed
Rev100
mb 5.9
Mwp 7.2
Mwpd 7.3
2021-03-04
13:27:38
-37.03 179.42 14 2021-03-04
13:47:13
Sala Sismica INGV-Roma 87716301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-04 13:27:38
Latitude -37.03
Longitude 179.42
Depth (km) 14 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 87716301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 13531
Semi-minor axis of confidence ellipse (meter) 7063
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 109
Circular confidence region, given by single value of horizontal uncertainty (meter) 12310.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 39.8402
Number of associated phases, regardless of their use for origin computation 124
Number of defining phases 124
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.8253
Epicentral distance of station closest to the epicenter (degree) 7.032
Epicentral distance of station farthest from the epicenter (degree) 91.83425
Number of stations at which the event was observed 99
Number of stations from which data was used for origin computation 99
Magnitudes information

Mwpd:7.3

Field Value
Value 7.3
Uncertainty 0.1
Num. used stations 59
Type of magnitude Mwpd
Reference to an origin 87716301
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-03-04 13:47:13

Mwp:7.2

Field Value
Value 7.2
Uncertainty 0.1
Num. used stations 58
Type of magnitude Mwp
Reference to an origin 87716301
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-03-04 13:47:13

mb:5.9

Field Value
Value 5.9
Uncertainty 0.2
Num. used stations 62
Type of magnitude mb
Reference to an origin 87716301
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-03-04 13:47:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IU.PET.BHZ.00 2021-03-04T13:40:42.72 10.0 positive automatic P 348 91.8343 -1.4185 0
IU.YSS.BHZ.00 2021-03-04T13:40:35.40 10.0 positive automatic P 336 90.1678 -1.00663 0.0868333
IU.ADK.BHZ.00 2021-03-04T13:40:30.15 10.0 negative automatic P 2 88.9702 -0.65223 0.0956681
IU.INCN.BHZ.00 2021-03-04T13:40:30.32 10.0 positive automatic P 321 89.0396 -0.790522 0.0941456
GE.LHMI.BHZ. 2021-03-04T13:40:20.32 10.0 positive automatic P 279 87.1722 -1.90012 0.104575
IU.LCO.BHZ.00 2021-03-04T13:40:18.92 10.0 negative automatic P 125 86.8644 -2.19375 0.109079
WA.ZON.HHZ. 2021-03-04T13:40:17.13 10.0 negative automatic P 128 86.4805 -1.84479 0.113852
JP.JTM.BHZ. 2021-03-04T13:40:11.25 10.0 positive automatic P 332 85.3733 -2.12973 0.125529
C.GO04.BHZ. 2021-03-04T13:40:14.80 10.0 positive automatic P 125 86.0346 -2.20684 0
G.CRZF.BHZ.00 2021-03-04T13:40:13.80 10.0 positive automatic sP 213 84.2083 1.13091 0
MY.KUM.BHZ. 2021-03-04T13:40:05.87 10.0 positive automatic P 281 84.2983 -2.09486 0.134066
C1.CO02.BHZ. 2021-03-04T13:40:10.90 10.0 negative automatic P 126 85.227 -1.93656 0.126674
G.CRZF.BHZ.00 2021-03-04T13:40:09.05 10.0 positive automatic P 213 84.2083 1.53277 0.13173
GE.GSI.BHZ. 2021-03-04T13:40:06.97 10.0 positive automatic P 276 84.2846 -0.930513 0.134177
C1.BO02.BHZ. 2021-03-04T13:39:59.47 10.0 negative automatic P 129 83.0155 -2.05509 0.146322
G.PEL.BHZ.00 2021-03-04T13:40:05.40 10.0 negative automatic P 128 84.1621 -1.978 0.138386
RM.DLV.BHZ. 2021-03-04T13:39:57.62 10.0 positive automatic P 291 82.5054 -1.3063 0.145545
IU.MAJO.BHZ.00 2021-03-04T13:39:57.97 10.0 positive automatic P 328 82.8795 -2.76524 0.136257
JP.JMN.BHZ. 2021-03-04T13:39:57.30 10.0 positive automatic P 323 82.4912 -1.44016 0.0986025
JP.JSU.BHZ. 2021-03-04T13:39:55.95 10.0 positive automatic P 320 82.4048 -2.31484 0.0707784
IU.TATO.BHZ.00 2021-03-04T13:39:56.62 10.0 positive automatic P 309 82.5214 -2.21018 0.0703091
JP.YOJ.BHZ. 2021-03-04T13:39:55.10 10.0 positive automatic pP 310 81.2171 -1.50192 0
G.INU.BHZ.00 2021-03-04T13:39:55.66 10.0 positive automatic P 326 82.3811 -2.43424 0.143323
JP.JSG.BHZ. 2021-03-04T13:39:55.15 10.0 negative automatic pP 327 81.3061 -1.93774 0
C.GO05.BHZ. 2021-03-04T13:39:54.63 10.0 negative automatic P 128 82.158 -2.29392 0.143554
JP.YOJ.BHZ. 2021-03-04T13:39:50.10 10.0 positive automatic P 310 81.2171 -1.84129 0.075648
JP.JSG.BHZ. 2021-03-04T13:39:50.70 10.0 positive automatic P 327 81.3061 -1.72746 0.105388
GE.BKNI.BHZ. 2021-03-04T13:39:47.72 10.0 positive automatic P 277 80.9422 -2.76683 0.151927
JP.JMZ.BHZ. 2021-03-04T13:39:33.70 10.0 positive automatic P 317 77.4775 2.15042 0.174489
JP.JOW.BHZ. 2021-03-04T13:39:42.95 10.0 positive automatic P 315 79.9157 -2.0453 0.164143
JP.JHJ2.BHZ. 2021-03-04T13:39:42.95 10.0 positive automatic P 327 79.2658 1.51698 0
C.GO06.BHZ. 2021-03-04T13:39:40.65 10.0 negative automatic P 132 79.4926 -2.22761 0.160715
GT.PLCA.BHZ.00 2021-03-04T13:39:39.85 10.0 negative automatic P 134 79.2919 -1.89406 0.181751
C1.VA04.BHZ. 2021-03-04T13:39:36.05 10.0 negative automatic P 124 78.5608 -1.52124 0.156997
II.EFI.BHZ.00 2021-03-04T13:39:32.45 10.0 negative automatic P 148 78.0912 -2.53088 0.160806
II.COCO.BHZ.00 2021-03-04T13:39:31.45 10.0 positive automatic P 265 76.8253 3.5699 0.174759
G.AIS.BHZ.00 2021-03-04T13:39:29.95 10.0 negative automatic P 233 76.1396 5.95351 0.208013
GE.MNAI.BHZ. 2021-03-04T13:39:24.82 10.0 positive automatic P 275 76.5758 -1.67093 0.0962307
MY.SBM.BHZ. 2021-03-04T13:39:07.52 10.0 positive automatic P 286 73.5429 -1.48631 0.219621
JP.JCJ.BHZ. 2021-03-04T13:39:03.55 10.0 positive automatic P 326 73.0446 -2.50103 0.224626
MY.KKM.BHZ. 2021-03-04T13:39:03.47 10.0 positive automatic P 292 72.87 -1.66753 0.21696
C1.MG02.BHZ. 2021-03-04T13:39:00.08 10.0 negative automatic P 144 72.3178 -1.64652 0.117289
GE.SNAA.BHZ. 2021-03-04T13:38:52.66 10.0 positive automatic P 179 71.2878 -8.17587 0
GE.SMRI.BHZ. 2021-03-04T13:38:42.47 10.0 negative automatic P 277 69.0128 0.871026 0.292652
GE.BKB.BHZ. 2021-03-04T13:38:33.62 10.0 positive automatic P 286 67.662 0.492492 0.288567
IU.DAV.BHZ.00 2021-03-04T13:38:27.37 10.0 positive automatic P 299 66.8335 -0.510828 0
IU.PMSA.BHZ.00 2021-03-04T13:38:26.07 10.0 negative automatic P 156 66.8698 -2.02261 0.206178
IU.MIDW.BHZ.00 2021-03-04T13:38:17.27 10.0 positive automatic P 3 65.3089 -0.793391 0.327363
GE.JAGI.BHZ. 2021-03-04T13:38:15.82 10.0 positive automatic P 278 65.2212 -1.70005 0.317515
AU.MAW.BHZ. 2021-03-04T13:38:14.93 10.0 negative automatic P 202 65.1115 -1.85397 0.326095
GE.LUWI.BHZ. 2021-03-04T13:38:04.02 10.0 positive automatic P 291 63.2667 -0.65378 0.357587
II.KAPI.BHZ.00 2021-03-04T13:38:02.40 10.0 positive automatic P 285 62.9796 -0.423983 0.369986
G.KIP.BHZ.00 2021-03-04T13:37:58.50 10.0 positive automatic P 24 62.1979 0.927304 0.347568
IU.POHA.BHZ.00 2021-03-04T13:37:53.00 10.0 positive automatic P 27 61.4986 0.808484 0.385762
GE.TNTI.BHZ. 2021-03-04T13:37:48.42 10.0 positive automatic P 296 61.1304 -1.94024 0.30202
II.RPN.BHZ.00 2021-03-04T13:37:43.67 10.0 positive automatic P 103 59.7975 2.40693 0.334726
GE.SANI.BHZ. 2021-03-04T13:37:42.52 10.0 positive automatic P 292 60.2037 -1.51925 0.390036
C1.VA02.BHZ. 2021-03-04T13:37:42.48 10.0 positive automatic P 103 59.7033 1.86781 0.396877
IU.GUMO.BHZ.00 2021-03-04T13:37:41.22 10.0 positive automatic P 321 60.1532 -2.4961 0.188921
GE.MMRI.BHZ. 2021-03-04T13:37:33.62 10.0 positive automatic P 284 58.786 -0.653331 0.419097
AU.GIRL.BHZ.00 2021-03-04T13:37:23.28 10.0 positive automatic P 265 57.2417 -0.164652 0.431395
GE.SOEI.BHZ. 2021-03-04T13:37:19.22 10.0 positive automatic P 284 56.5198 0.736969 0.452065
IU.RAR.BHZ.00 2021-03-04T13:37:11.45 10.0 positive automatic S 55 23.9894 5.59445 0
GE.BNDI.BHZ. 2021-03-04T13:37:10.62 10.0 positive automatic P 293 55.6511 -1.47297 0.392087
GE.FAKI.BHZ. 2021-03-04T13:37:06.12 10.0 positive automatic P 297 55.0591 -1.72919 0.443065
IU.MBWA.BHZ.00 2021-03-04T13:36:55.65 10.0 positive automatic P 270 53.6183 -1.72445 0.514028
AU.MORW.BHZ. 2021-03-04T13:36:49.40 10.0 negative automatic P 259 52.7518 -1.61568 0.534504
GE.SAUI.BHZ. 2021-03-04T13:36:47.62 10.0 positive automatic P 291 52.306 -0.0498236 0.244147
IU.NWAO.BHZ.00 2021-03-04T13:36:30.05 10.0 positive automatic P 255 50.2014 -1.88149 0.557052
GE.GENI.BHZ. 2021-03-04T13:36:28.82 10.0 positive automatic P 304 49.8449 -0.346036 0.520133
AU.MTN.BHZ.00 2021-03-04T13:36:24.28 10.0 positive automatic P 286 49.3209 -0.909628 0.51698
AU.KDU.BHZ.00 2021-03-04T13:36:16.60 10.0 positive automatic P 288 48.3951 -1.46045 0.202946
IU.CASY.BHZ.00 2021-03-04T13:36:15.32 10.0 positive automatic P 210 48.1613 -0.93224 0.571171
G.TAOE.BHZ.00 2021-03-04T13:36:02.70 10.0 positive automatic P 63 46.1188 2.24919 0.219026
AU.MANU.BHZ.00 2021-03-04T13:35:58.15 10.0 positive automatic P 312 45.7563 0.666742 0.591312
IU.XMAS.BHZ.00 2021-03-04T13:35:50.92 10.0 negative automatic P 34 44.5835 2.77849 0.646308
AU.WRKA.BHZ.00 2021-03-04T13:35:48.68 10.0 positive automatic P 270 44.8569 -1.75281 0.672763
II.WRAB.BHZ.00 2021-03-04T13:35:31.00 10.0 positive automatic P 281 42.6528 -0.655315 0.714199
AU.FORT.BHZ.00 2021-03-04T13:35:30.95 10.0 positive automatic P 263 42.5688 -0.984307 0.698761
AU.RABL.BHZ.00 2021-03-04T13:35:21.43 10.0 positive automatic P 316 41.2495 0.255127 0.690689
IU.SBA.BHZ.00 2021-03-04T13:35:20.10 10.0 negative automatic P 184 41.1778 -0.444098 0.464847
GT.VNDA.BHZ.00 2021-03-04T13:35:18.48 10.0 positive automatic P 186 41.194 -2.2093 0.640728
AU.COEN.BHZ. 2021-03-04T13:35:09.50 10.0 positive automatic P 296 39.6347 1.6855 0.763637
IU.TARA.BHZ.00 2021-03-04T13:34:59.42 10.0 positive automatic P 350 38.8503 -1.78946 0.798332
IU.CTAO.BHZ.00 2021-03-04T13:34:16.05 10.0 positive automatic P 291 33.4374 1.07749 0.820781
G.PPTF.BHZ.00 2021-03-04T13:34:15.65 10.0 negative automatic P 63 33.4652 0.381159 0.858389
AU.HTT.BHZ. 2021-03-04T13:34:11.70 10.0 positive automatic P 264 33.0259 0.259566 0.785211
IU.HNR.BHZ.00 2021-03-04T13:34:08.95 10.0 positive automatic P 323 32.7257 0.242315 0.695614
AU.QLP.BHZ. 2021-03-04T13:33:58.47 10.0 positive automatic P 279 31.4598 0.862754 0.89984
IU.FUNA.BHZ.00 2021-03-04T13:33:34.32 10.0 positive automatic P 360 28.5001 2.93582 0.952381
AU.EIDS.BHZ. 2021-03-04T13:33:17.02 10.0 positive automatic P 288 26.7557 1.22805 0.909091
II.TAU.BHZ.00 2021-03-04T13:33:00.67 10.0 positive automatic P 246 25.1295 -0.384905 0.869565
G.CAN.BHZ.00 2021-03-04T13:32:56.45 10.0 positive automatic P 265 24.513 0.907702 0.833333
IU.AFI.BHZ.00 2021-03-04T13:32:55.97 10.0 negative automatic P 21 24.4139 1.32801 0.909091
AU.MILA.BHZ.00 2021-03-04T13:32:52.15 10.0 positive automatic P 261 24.053 0.791524 0.97561
G.SANVU.BHZ.00 2021-03-04T13:32:52.70 10.0 positive automatic P 330 24.1482 0.598698 0.43956
AU.ARMA.BHZ. 2021-03-04T13:32:52.72 10.0 positive automatic P 278 23.9423 2.31632 0.898876
IU.RAR.BHZ.00 2021-03-04T13:32:50.65 10.0 positive automatic P 55 23.9894 -0.000808708 0.683761
AU.RIV.BHZ. 2021-03-04T13:32:45.25 10.0 positive automatic P 269 23.1623 2.64605 0.930233
AU.MCQ.BHZ.00 2021-03-04T13:32:33.95 10.0 negative automatic P 212 22.39 -0.471179 0.43956
II.MSVF.BHZ.00 2021-03-04T13:32:01.97 10.0 positive automatic P 356 19.3184 0.607136 0.930233
NZ.KHZ.HHZ.10 2021-03-04T13:30:34.64 10.0 positive automatic S 218 7.032 -2.9914 0
IU.RAO.BHZ.00 2021-03-04T13:29:30.75 10.0 negative automatic P 17 8.0906 -2.85504 0.909091
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