Earthquake with magnitude of Mwp 6.3 on date 07-04-2021 and time 09:53:27 (UTC) in region New Zealand [Sea]

A magnitude Mwp 6.3 earthquake occured in region: New Zealand [Sea], on

  • 07-04-2021 09:53:27 (UTC)
  • 07-04-2021 11:53:27 (UTC +02:00) Italian time
  • 07-04-2021 22:53:27 (UTC +13:00) local time in the region of the earthquake (Pacific/Tongatapu)

and geographic coordinates (lat, lon) -29.109, -176.261 at 3 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 5.3
Mwp 6.3

Mwpd 6.4
2021-04-07
09:53:27
-29.1094 -176.261 3 2021-04-07
10:16:36
Sala Sismica INGV-Roma 88879201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-07 09:53:27
Latitude -29.1094
Longitude -176.2610
Depth (km) 3 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 88879201

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 41771
Semi-minor axis of confidence ellipse (meter) 15044
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 313
Circular confidence region, given by single value of horizontal uncertainty (meter) 33720.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 141.56
Number of associated phases, regardless of their use for origin computation 92
Number of defining phases 92
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 2.73564
Epicentral distance of station closest to the epicenter (degree) 12.49885
Epicentral distance of station farthest from the epicenter (degree) 95.02451
Number of stations at which the event was observed 69
Number of stations from which data was used for origin computation 69
Magnitudes information

Mwp:6.3

Field Value
Value 6.3
Uncertainty 0.1
Num. used stations 14
Type of magnitude Mwp
Reference to an origin 88879201
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-04-07 10:16:36

Mwpd:6.4

Field Value
Value 6.4
Uncertainty 0.1
Num. used stations 14
Type of magnitude Mwpd
Reference to an origin 88879201
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-04-07 10:16:36

mb:5.3

Field Value
Value 5.3
Uncertainty 0.1
Num. used stations 28
Type of magnitude mb
Reference to an origin 88879201
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-04-07 10:16:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
US.AMTX.BHZ.00 2021-04-07T10:06:53.28 10.0 positive automatic PcP 53 95.0245 3.29969 0
US.BOZ.BHZ.00 2021-04-07T10:06:51.45 10.0 negative automatic P 39 94.9085 2.22395 0.0622059
US.BW06.BHZ.00 2021-04-07T10:06:47.95 10.0 positive automatic P 43 94.3917 0.985584 0.064332
US.JCT.BHZ.00 2021-04-07T10:06:48.33 10.0 negative automatic P 57 94.0357 3.27292 0.0627219
US.SDCO.BHZ.00 2021-04-07T10:06:48.63 10.0 positive automatic PcP 48 94.0178 2.85136 0
US.NEW.BHZ.00 2021-04-07T10:06:46.53 10.0 negative automatic PcP 35 93.7037 2.46002 0
IU.ANMO.BHZ.00 2021-04-07T10:06:36.97 10.0 negative automatic P 50 91.7958 2.03817 0.0777855
IU.MA2.BHZ.00 2021-04-07T10:06:37.87 10.0 positive automatic P 344 92.7644 -1.28309 0.0493206
US.HLID.BHZ.00 2021-04-07T10:06:37.78 10.0 negative automatic P 40 92.0899 1.49063 0.0735387
US.MVCO.BHZ.00 2021-04-07T10:06:37.00 10.0 positive automatic P 48 91.7618 2.16578 0.0807121
US.DUG.BHZ.00 2021-04-07T10:06:34.23 10.0 positive automatic P 43 90.8921 3.54178 0.0872653
US.HAWA.BHZ.00 2021-04-07T10:06:33.78 10.0 positive automatic P 35 91.2369 1.68501 0.0821233
US.BMO.BHZ.00 2021-04-07T10:06:33.93 10.0 positive automatic P 37 91.3529 1.15885 0.0842733
US.MNTX.BHZ.00 2021-04-07T10:06:31.88 10.0 negative automatic P 54 90.6902 2.31549 0.0875628
US.ELK.BHZ.00 2021-04-07T10:06:27.03 10.0 negative automatic P 42 89.8144 1.23725 0.0872802
US.WUAZ.BHZ.00 2021-04-07T10:06:24.02 10.0 negative automatic P 47 88.8961 2.64671 0.100831
US.WVOR.BHZ.00 2021-04-07T10:06:23.03 10.0 negative automatic P 39 89.0194 1.11354 0.0976667
IU.TUC.BHZ.00 2021-04-07T10:06:16.25 10.0 positive automatic P 50 87.3322 2.42345 0.108321
GE.GSI.BHZ. 2021-04-07T10:06:15.67 10.0 positive automatic P 273 87.2812 2.23186 0.073573
US.TPNV.BHZ.00 2021-04-07T10:06:13.13 10.0 positive automatic P 44 86.7529 1.9989 0.115133
G.PEL.BHZ.00 2021-04-07T10:06:12.45 10.0 positive automatic PcP 126 86.0152 2.42077 0
BK.CMB.BHZ.00 2021-04-07T10:06:03.90 10.0 negative automatic P 41 85.044 1.39266 0.122571
II.PFO.BHZ.00 2021-04-07T10:06:02.35 10.0 negative automatic P 46 84.4491 2.73828 0.134576
BK.SAO.BHZ.00 2021-04-07T10:05:58.57 10.0 negative automatic P 41 83.5567 3.68375 0.137095
BK.MCCM.BHZ.00 2021-04-07T10:05:59.57 10.0 negative automatic PcP 39 83.7161 -0.221119 0
IU.YSS.BHZ.00 2021-04-07T10:05:59.55 10.0 positive automatic P 333 84.5656 -0.44686 0.0624098
RM.DLV.BHZ. 2021-04-07T10:05:55.02 10.0 positive automatic P 288 83.291 1.35264 0
C.GO06.BHZ. 2021-04-07T10:05:52.90 10.0 positive automatic PcP 131 82.0578 0.169614 0
GT.PLCA.BHZ.00 2021-04-07T10:05:52.68 10.0 positive automatic PcP 133 82.0537 -0.00317979 0
JP.JKA.BHZ. 2021-04-07T10:05:48.15 10.0 positive automatic PcP 330 79.8758 5.1293 0
C1.LL02.BHZ. 2021-04-07T10:05:41.65 10.0 positive automatic PcP 134 79.952 -1.7264 0
JP.JTM.BHZ. 2021-04-07T10:05:39.30 10.0 negative automatic P 329 80.2944 1.61725 0
GE.SNAA.BHZ. 2021-04-07T10:05:35.46 10.0 negative automatic P 178 79.1109 -4.33568 0
G.COYC.BHZ.00 2021-04-07T10:05:34.60 10.0 positive automatic P 136 78.5997 -2.86802 0
JP.JSU.BHZ. 2021-04-07T10:05:29.75 10.0 positive automatic P 316 78.983 -0.848183 0.184892
JP.JMN.BHZ. 2021-04-07T10:05:27.85 10.0 positive automatic P 320 78.5624 -0.460678 0
IU.MAJO.BHZ.00 2021-04-07T10:05:25.62 10.0 positive automatic P 324 78.3434 -1.46091 0
JP.JGF.BHZ. 2021-04-07T10:05:24.95 10.0 positive automatic P 323 78.0619 -0.599294 0
G.INU.BHZ.00 2021-04-07T10:05:24.66 10.0 positive automatic P 323 78.0402 -0.689417 0
C.GO10.BHZ. 2021-04-07T10:05:17.28 10.0 negative automatic PcP 143 75.4099 -6.45809 0
MY.SBM.BHZ. 2021-04-07T10:05:09.62 10.0 positive automatic P 281 75.1765 0.449642 0.144225
MY.KKM.BHZ. 2021-04-07T10:04:59.57 10.0 positive automatic P 287 73.6818 -1.00399 0.154584
GE.BKB.BHZ. 2021-04-07T10:04:35.02 10.0 positive automatic P 281 69.3237 0.86972 0
GE.JAGI.BHZ. 2021-04-07T10:04:26.07 10.0 positive automatic P 272 68.0926 -0.417701 0
AU.GIRL.BHZ.00 2021-04-07T10:03:48.88 10.0 positive automatic P 258 61.9885 2.09313 0.383832
GE.SOEI.BHZ. 2021-04-07T10:03:25.27 10.0 positive automatic P 276 58.6779 0.979887 0.198899
AU.MORW.BHZ. 2021-04-07T10:03:21.57 10.0 positive automatic P 252 58.2527 0.380504 0.432053
IU.MBWA.BHZ.00 2021-04-07T10:03:18.22 10.0 positive automatic P 262 57.8111 0.14279 0.454558
IU.CASY.BHZ.00 2021-04-07T10:03:14.72 10.0 positive automatic P 207 56.8401 3.53518 0.458281
AU.FITZ.BHZ. 2021-04-07T10:02:49.95 10.0 positive automatic P 268 53.8413 0.359716 0.492948
AU.MTN.BHZ.00 2021-04-07T10:02:29.15 10.0 positive automatic P 277 51.2829 -1.48201 0.252019
AU.KDU.BHZ.00 2021-04-07T10:02:21.10 10.0 positive automatic P 278 50.1939 -1.30406 0.361739
AU.WRKA.BHZ.00 2021-04-07T10:02:12.50 10.0 positive automatic P 261 49.0863 -1.56008 0.515363
AU.FORT.BHZ.00 2021-04-07T10:02:03.30 10.0 positive automatic P 253 47.7641 -0.486696 0.605587
II.WRAB.BHZ.00 2021-04-07T10:01:45.47 10.0 negative automatic P 270 45.5234 -0.780007 0.645108
AU.HTT.BHZ. 2021-04-07T10:00:47.75 10.0 positive automatic P 252 38.2559 0.853231 0.78189
IU.CTAO.BHZ.00 2021-04-07T10:00:20.42 10.0 positive automatic P 276 35.0935 0.551917 0.866137
AU.QLP.BHZ. 2021-04-07T10:00:18.72 10.0 negative automatic P 264 34.8581 0.910683 0.830573
II.TAU.BHZ.00 2021-04-07T09:59:57.32 10.0 negative automatic P 235 32.2027 2.65704 0.884783
AU.MILA.BHZ.00 2021-04-07T09:59:37.15 10.0 positive automatic P 245 29.8651 2.98732 0
G.CAN.BHZ.00 2021-04-07T09:59:36.80 10.0 positive automatic P 249 29.8826 2.49817 0.888889
AU.EIDS.BHZ. 2021-04-07T09:59:29.40 10.0 positive automatic P 270 29.1816 1.39134 0.610687
AU.ARMA.BHZ. 2021-04-07T09:59:18.92 10.0 positive automatic P 259 27.8105 2.96939 0.963855
IU.FUNA.BHZ.00 2021-04-07T09:58:06.47 10.0 negative automatic P 347 21.0205 -3.69433 0.869565
NZ.ODZ.HHZ.10 2021-04-07T09:57:45.65 10.0 negative automatic P 209 18.9984 -2.53195 0.97561
IU.RAR.BHZ.00 2021-04-07T09:57:22.60 10.0 negative automatic P 66 16.8572 0.225783 0.97561
IU.AFI.BHZ.00 2021-04-07T09:57:02.05 10.0 positive automatic P 16 15.7565 -6.33595 0.97561
IU.SNZO.BHZ.00 2021-04-07T09:56:44.47 10.0 negative automatic P 209 14.239 -3.46653 0.97561
II.MSVF.BHZ.00 2021-04-07T09:56:23.87 10.0 negative automatic P 334 12.4988 -0.425747 0.930233
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