Earthquake with magnitude of Mwp 6.2 on date 29-04-2021 and time 08:50:31 (Italy) in region New Zealand [Sea]

A magnitude Mwp 6.2 earthquake occured in region: New Zealand [Sea], on

  • 29-04-2021 06:50:31 (UTC)
  • 29-04-2021 08:50:31 (UTC +02:00) Italian time
  • 29-04-2021 19:50:31 (UTC +13:00) local time in the region of the earthquake (Pacific/Tongatapu)

and geographic coordinates (lat, lon) -29.067, -176.564 at 8 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 5.4
Mwp 6.2

Mwpd 6.3
2021-04-29
06:50:31
-29.0672 -176.564 8 2021-04-29
07:04:57
Sala Sismica INGV-Roma 89578751
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-29 06:50:31
Latitude -29.0672
Longitude -176.5640
Depth (km) 8 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 89578751

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 20754
Semi-minor axis of confidence ellipse (meter) 2866
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 108
Circular confidence region, given by single value of horizontal uncertainty (meter) 16753.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69.8459
Number of associated phases, regardless of their use for origin computation 59
Number of defining phases 59
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 2.66981
Epicentral distance of station closest to the epicenter (degree) 10.34814
Epicentral distance of station farthest from the epicenter (degree) 80.94603
Number of stations at which the event was observed 51
Number of stations from which data was used for origin computation 51
Magnitudes information

Mwp:6.2

Field Value
Value 6.2
Uncertainty 0.1
Num. used stations 27
Type of magnitude Mwp
Reference to an origin 89578751
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-04-29 07:04:57

Mwpd:6.3

Field Value
Value 6.3
Uncertainty 0.1
Num. used stations 22
Type of magnitude Mwpd
Reference to an origin 89578751
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-04-29 07:04:57

mb:5.4

Field Value
Value 5.4
Uncertainty 0.1
Num. used stations 37
Type of magnitude mb
Reference to an origin 89578751
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-04-29 07:04:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IU.ADK.BHZ.00 2021-04-29T07:02:45.17 10.0 negative automatic P 360 80.946 0.656158 0.168366
IU.TATO.BHZ.00 2021-04-29T07:02:41.22 10.0 negative automatic P 306 80.3478 -0.0923042 0
G.COYC.BHZ.00 2021-04-29T07:02:36.25 10.0 negative automatic P 136 78.8136 3.27507 0.177859
GE.MNAI.BHZ. 2021-04-29T07:02:37.22 10.0 negative automatic P 271 79.5638 0.152597 0
GE.SNAA.BHZ. 2021-04-29T07:02:36.26 10.0 positive automatic P 178 79.1626 1.26426 0
GE.PMBI.BHZ. 2021-04-29T07:02:32.42 10.0 negative automatic P 273 78.7458 -0.143534 0
IU.MAJO.BHZ.00 2021-04-29T07:02:28.57 10.0 negative automatic P 324 78.1542 -0.794934 0.18825
G.INU.BHZ.00 2021-04-29T07:02:27.21 10.0 negative automatic P 323 77.8459 -0.395887 0.182712
JP.JGF.BHZ. 2021-04-29T07:02:27.60 10.0 positive automatic P 323 77.8689 -0.212899 0
MY.SBM.BHZ. 2021-04-29T07:02:11.47 10.0 negative automatic P 282 74.9081 0.515924 0
MY.KKM.BHZ. 2021-04-29T07:02:02.12 10.0 negative automatic P 287 73.4156 -0.221448 0
MY.LDM.BHZ. 2021-04-29T07:01:49.47 10.0 negative automatic P 287 71.0376 1.45811 0
AU.GIRL.BHZ.00 2021-04-29T07:00:49.53 10.0 negative automatic P 258 61.7372 1.08558 0.387037
GE.SANI.BHZ. 2021-04-29T07:00:41.22 10.0 negative automatic P 285 60.8291 -1.05545 0.390445
GE.SOEI.BHZ. 2021-04-29T07:00:26.82 10.0 negative automatic P 277 58.4095 1.05237 0
AU.MORW.BHZ. 2021-04-29T07:00:21.70 10.0 negative automatic P 252 58.0134 -1.17036 0.440439
IU.MBWA.BHZ.00 2021-04-29T07:00:18.52 10.0 negative automatic P 262 57.554 -1.09795 0.447267
IU.CASY.BHZ.00 2021-04-29T07:00:14.07 10.0 positive automatic P 207 56.7555 0.133349 0.428641
IU.NWAO.BHZ.00 2021-04-29T07:00:09.15 10.0 negative automatic P 248 55.9288 1.04015 0.43081
GE.FAKI.BHZ. 2021-04-29T07:00:00.97 10.0 negative automatic P 288 55.1167 -1.25324 0.473102
G.KIP.BHZ.00 2021-04-29T06:59:52.15 10.0 negative automatic P 22 53.5588 1.27026 0.485724
IU.POHA.BHZ.00 2021-04-29T06:59:47.70 10.0 positive automatic P 25 52.8718 1.55691 0.496217
AU.MTN.BHZ.00 2021-04-29T06:59:31.03 10.0 negative automatic P 277 51.0145 -0.947717 0.537353
IU.SBA.BHZ.00 2021-04-29T06:59:22.70 10.0 positive automatic P 185 49.3667 3.22464 0.527509
AU.KDU.BHZ.00 2021-04-29T06:59:22.78 10.0 positive automatic P 278 49.9253 -0.952053 0.56163
GT.VNDA.BHZ.00 2021-04-29T06:59:22.45 10.0 positive automatic P 186 49.4542 2.30027 0.068759
AU.WRKA.BHZ.00 2021-04-29T06:59:13.75 10.0 negative automatic P 261 48.831 -1.71327 0.579963
AU.FORT.BHZ.00 2021-04-29T06:59:03.58 10.0 negative automatic P 253 47.5218 -1.69016 0.602283
II.WRAB.BHZ.00 2021-04-29T06:58:46.27 10.0 positive automatic P 270 45.2581 -1.24361 0.665355
AU.MANU.BHZ.00 2021-04-29T06:58:33.83 10.0 negative automatic P 302 43.6647 -0.906368 0.647636
AU.HTT.BHZ. 2021-04-29T06:57:47.65 10.0 positive automatic P 252 38.0171 -0.601297 0.733801
IU.CTAO.BHZ.00 2021-04-29T06:57:22.37 10.0 negative automatic P 276 34.8251 1.44252 0.811955
AU.QLP.BHZ. 2021-04-29T06:57:19.25 10.0 negative automatic P 264 34.5981 0.305995 0.740669
II.TAU.BHZ.00 2021-04-29T06:56:56.47 10.0 negative automatic P 235 32.0108 0.11597 0.868163
NZ.KHZ.HHZ.10 2021-04-29T06:56:44.63 10.0 negative automatic S 208 15.5529 -15.8024 0
AU.MILA.BHZ.00 2021-04-29T06:56:37.03 10.0 positive automatic P 245 29.6414 1.46572 0.987654
G.CAN.BHZ.00 2021-04-29T06:56:36.65 10.0 negative automatic P 249 29.6502 1.02735 0.851064
IU.HNR.BHZ.00 2021-04-29T06:56:33.52 10.0 negative automatic P 307 29.4878 -0.564136 0.43956
AU.EIDS.BHZ. 2021-04-29T06:56:30.57 10.0 negative automatic P 270 28.9166 1.53899 0.888889
AU.RIV.BHZ. 2021-04-29T06:56:21.25 10.0 positive automatic P 252 27.8272 1.95145 0.707965
AU.ARMA.BHZ. 2021-04-29T06:56:18.97 10.0 negative automatic P 259 27.5577 1.90063 0.898876
IU.SNZO.BHZ.00 2021-04-29T06:56:12.47 10.0 positive automatic S 208 14.1507 -13.8251 0
AU.LHI.BHZ.00 2021-04-29T06:55:18.45 10.0 negative automatic P 257 21.1438 3.51973 0.930233
IU.FUNA.BHZ.00 2021-04-29T06:55:13.05 10.0 positive automatic P 348 20.9231 0.506961 0.91954
G.SANVU.BHZ.00 2021-04-29T06:55:05.50 10.0 negative automatic P 309 20.2322 0.448613 0.43956
NZ.ODZ.HHZ.10 2021-04-29T06:54:42.06 10.0 negative automatic P 209 18.9059 -8.53471 0.985222
IU.RAR.BHZ.00 2021-04-29T06:54:28.87 10.0 positive automatic P 66 17.0827 0.18861 0.930233
IU.AFI.BHZ.00 2021-04-29T06:54:11.25 10.0 positive automatic P 17 15.7927 -1.09778 0.860215
AU.NFK.BHZ.00 2021-04-29T06:53:47.24 10.0 negative automatic P 266 13.5362 5.35997 0
IU.SNZO.BHZ.00 2021-04-29T06:53:45.02 10.0 positive automatic P 208 14.1507 -5.2331 0.97561
II.MSVF.BHZ.00 2021-04-29T06:53:28.42 10.0 negative automatic P 335 12.3475 2.67528 0.888889
NZ.OUZ.HHZ.10 2021-04-29T06:53:00.05 10.0 positive automatic P 231 10.3481 1.79105 0.947867
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