Earthquake with magnitude of Mwp 6.0 on date 05-04-2021 and time 09:37:53 (Italy) in region Off east coast of North Island, New Zealand [Sea: New Zealand]

A magnitude Mwp 6.0 earthquake occured in region: Off east coast of North Island, New Zealand [Sea: New Zealand], on

  • 05-04-2021 07:37:53 (UTC)
  • 05-04-2021 09:37:53 (UTC +02:00) Italian time
  • 05-04-2021 19:37:53 (UTC +12:00) local time in the region of the earthquake (Pacific/Auckland)

and geographic coordinates (lat, lon) -37.582, 179.499 at 10 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 5.5
Mwp 6.0

Mwpd 6.4
2021-04-05
07:37:53
-37.582 179.499 10 2021-04-05
07:55:50
Sala Sismica INGV-Roma 88787891
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-05 07:37:53
Latitude -37.5820
Longitude 179.4990
Depth (km) 10 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 88787891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 21917
Semi-minor axis of confidence ellipse (meter) 16971
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 279
Circular confidence region, given by single value of horizontal uncertainty (meter) 17692.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 60.3912
Number of associated phases, regardless of their use for origin computation 73
Number of defining phases 73
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 2.15878
Epicentral distance of station closest to the epicenter (degree) 2.00249
Epicentral distance of station farthest from the epicenter (degree) 98.46666
Number of stations at which the event was observed 67
Number of stations from which data was used for origin computation 67
Magnitudes information

Mwp:6

Field Value
Value 6
Uncertainty 0.2
Num. used stations 31
Type of magnitude Mwp
Reference to an origin 88787891
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-04-05 07:55:50

Mwpd:6.4

Field Value
Value 6.4
Uncertainty 0.2
Num. used stations 28
Type of magnitude Mwpd
Reference to an origin 88787891
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-04-05 07:55:50

mb:5.5

Field Value
Value 5.5
Uncertainty 0.2
Num. used stations 51
Type of magnitude mb
Reference to an origin 88787891
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-04-05 07:55:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
US.MNTX.BHZ.00 2021-04-05T07:51:28.88 10.0 positive automatic P 56 98.4667 -1.04784 0.0425567
US.WVOR.BHZ.00 2021-04-05T07:51:25.88 10.0 negative automatic P 41 97.7952 -1.19745 0.023065
GT.LPAZ.BHZ.00 2021-04-05T07:51:24.55 10.0 positive automatic PcP 117 96.7985 1.2552 0
GT.CPUP.BHZ.00 2021-04-05T07:51:23.33 10.0 negative automatic P 131 96.7771 1.0626 0.0540921
US.TPNV.BHZ.00 2021-04-05T07:51:14.85 10.0 positive automatic P 46 95.2444 -0.693143 0.0588429
IU.CHTO.BHZ.00 2021-04-05T07:51:09.77 10.0 negative automatic P 291 94.216 -0.859182 0.0651457
II.PFO.BHZ.00 2021-04-05T07:51:03.97 10.0 positive automatic P 49 92.7905 -0.249239 0.0759849
AK.ATKA.BHZ. 2021-04-05T07:50:49.97 10.0 negative automatic P 4 89.9479 -0.848509 0.0944696
IU.ADK.BHZ.00 2021-04-05T07:50:46.22 10.0 negative automatic P 2 89.5226 -2.62114 0.0449578
WA.ZON.HHZ. 2021-04-05T07:50:33.47 10.0 positive automatic P 128 86.0919 0.952928 0.104368
C.GO04.BHZ. 2021-04-05T07:50:31.08 10.0 negative automatic P 125 85.6621 0.456654 0.11272
C1.CO02.BHZ. 2021-04-05T07:50:27.50 10.0 negative automatic P 126 84.8497 1.10365 0.0599101
GE.GSI.BHZ. 2021-04-05T07:50:23.22 10.0 positive automatic P 276 84.405 -0.746156 0.130101
G.PEL.BHZ.00 2021-04-05T07:50:22.15 10.0 negative automatic P 128 83.7731 1.30337 0.135116
MY.IPM.BHZ. 2021-04-05T07:50:18.12 10.0 positive automatic P 281 83.6674 -2.1074 0.139126
C1.BO02.BHZ. 2021-04-05T07:50:16.17 10.0 negative automatic P 129 82.6183 1.25843 0.146187
C.GO05.BHZ. 2021-04-05T07:50:11.60 10.0 negative automatic P 128 81.7638 1.3012 0.15522
C.GO06.BHZ. 2021-04-05T07:49:57.55 10.0 negative automatic P 132 79.0732 1.51733 0.183742
GT.PLCA.BHZ.00 2021-04-05T07:49:56.65 10.0 negative automatic P 133 78.8638 1.80277 0.185749
II.EFI.BHZ.00 2021-04-05T07:49:49.42 10.0 negative automatic P 148 77.5883 1.80072 0.200604
C1.LL02.BHZ. 2021-04-05T07:49:43.40 10.0 negative automatic P 135 76.5442 1.60448 0.190571
G.COYC.BHZ.00 2021-04-05T07:49:34.40 10.0 negative automatic P 137 74.9105 1.97312 0.215442
MY.KKM.BHZ. 2021-04-05T07:49:20.47 10.0 negative automatic P 292 73.1347 -1.67347 0
MY.LDM.BHZ. 2021-04-05T07:49:08.77 10.0 positive automatic P 293 70.8748 0.287191 0.270498
GE.SNAA.BHZ. 2021-04-05T07:49:08.96 10.0 negative automatic P 179 70.7316 1.23665 0.265832
GE.JAGI.BHZ. 2021-04-05T07:48:32.72 10.0 negative automatic P 279 65.3649 -1.16844 0.322826
AU.MAW.BHZ. 2021-04-05T07:48:31.13 10.0 negative automatic P 202 64.6206 2.11018 0.347924
GE.LUWI.BHZ. 2021-04-05T07:48:21.17 10.0 negative automatic P 291 63.5232 -0.631572 0
II.KAPI.BHZ.00 2021-04-05T07:48:19.22 10.0 negative automatic P 285 63.1867 -0.409432 0
GE.SANI.BHZ. 2021-04-05T07:47:59.32 10.0 positive automatic P 293 60.4741 -1.99653 0.386229
AU.GIRL.BHZ.00 2021-04-05T07:47:39.70 10.0 negative automatic P 265 57.257 0.725615 0.457001
GE.SOEI.BHZ. 2021-04-05T07:47:36.12 10.0 negative automatic P 284 56.7179 0.80484 0.438782
GE.FAKI.BHZ. 2021-04-05T07:47:22.92 10.0 negative automatic P 297 55.366 -2.56547 0.480352
IU.MBWA.BHZ.00 2021-04-05T07:47:11.65 10.0 positive automatic P 270 53.6797 -1.59693 0.4893
AU.MORW.BHZ. 2021-04-05T07:47:05.47 10.0 negative automatic P 259 52.7093 -0.647269 0.528596
AU.FITZ.BHZ. 2021-04-05T07:46:50.25 10.0 negative automatic P 277 50.6711 -0.599023 0.530421
IU.NWAO.BHZ.00 2021-04-05T07:46:46.22 10.0 positive automatic P 255 50.1209 -0.51255 0.558219
AU.MTN.BHZ.00 2021-04-05T07:46:41.18 10.0 negative automatic P 287 49.5392 -1.09355 0.482714
AU.KDU.BHZ.00 2021-04-05T07:46:34.13 10.0 positive automatic P 288 48.6246 -1.11889 0.527441
IU.CASY.BHZ.00 2021-04-05T07:46:29.72 10.0 negative automatic P 210 47.7138 1.52246 0.1928
AU.MANU.BHZ.00 2021-04-05T07:46:14.85 10.0 negative automatic P 313 46.1772 -1.36144 0.640544
II.WRAB.BHZ.00 2021-04-05T07:45:48.52 10.0 negative automatic P 281 42.8218 -0.909761 0.693867
AU.FORT.BHZ.00 2021-04-05T07:45:47.05 10.0 negative automatic P 263 42.5637 -0.251646 0.69045
AU.RABL.BHZ.00 2021-04-05T07:45:38.15 10.0 positive automatic P 316 41.6947 -2.08089 0.667304
IU.SBA.BHZ.00 2021-04-05T07:45:34.80 10.0 negative automatic P 184 40.6281 3.37876 0.671294
GT.VNDA.BHZ.00 2021-04-05T07:45:33.73 10.0 negative automatic P 186 40.6475 2.13776 0.670955
IU.CTAO.BHZ.00 2021-04-05T07:44:32.72 10.0 positive automatic P 292 33.6999 0.0729036 0.797743
AU.HTT.BHZ. 2021-04-05T07:44:26.72 10.0 negative automatic P 265 33.0336 -0.181086 0.898359
IU.HNR.BHZ.00 2021-04-05T07:44:25.62 10.0 positive automatic P 323 33.2057 -2.67478 0.790004
AU.QLP.BHZ. 2021-04-05T07:44:15.35 10.0 negative automatic P 280 31.614 0.980251 0.928811
AU.EIDS.BHZ. 2021-04-05T07:43:33.00 10.0 negative automatic P 289 26.9887 0.714102 0.909091
II.TAU.BHZ.00 2021-04-05T07:43:16.57 10.0 positive automatic P 248 24.9701 1.57546 0.97561
IU.AFI.BHZ.00 2021-04-05T07:43:14.62 10.0 negative automatic P 20 24.9111 0.0633402 0.941176
G.CAN.BHZ.00 2021-04-05T07:43:13.30 10.0 positive automatic P 266 24.5308 2.20579 0.97561
AU.ARMA.BHZ. 2021-04-05T07:43:10.05 10.0 positive automatic P 279 24.0857 2.94078 0.941176
G.SANVU.BHZ.00 2021-04-05T07:43:09.25 10.0 positive automatic P 331 24.6619 -2.92716 0.869565
AU.MILA.BHZ.00 2021-04-05T07:43:08.68 10.0 positive automatic P 262 24.031 2.12975 0.930233
ND.KOUNC.BHZ.00 2021-04-05T07:42:40.60 10.0 positive automatic P 318 21.5422 -0.124026 0.888889
II.MSVF.BHZ.00 2021-04-05T07:42:20.57 10.0 positive automatic P 356 19.8769 -2.24435 0.952381
ND.ONTNC.BHZ.00 2021-04-05T07:42:13.15 10.0 negative automatic P 320 18.958 0.513011 0.851064
AU.LHI.BHZ.00 2021-04-05T07:42:02.55 10.0 positive automatic P 284 17.8452 2.84992 0.963855
AU.NFK.BHZ.00 2021-04-05T07:40:58.06 10.0 positive automatic P 308 12.8736 3.67486 0.328947
NZ.ODZ.HHZ.10 2021-04-05T07:40:10.32 10.0 positive automatic P 219 9.9829 -4.5243 0.970874
NZ.KHZ.HHZ.10 2021-04-05T07:39:25.57 10.0 positive automatic P 221 6.6455 -3.45898 0.990099
NZ.OUZ.HHZ.10 2021-04-05T07:39:12.63 10.0 positive automatic P 295 5.3036 2.03582 0.888889
IU.SNZO.BHZ.00 2021-04-05T07:39:07.02 10.0 negative automatic P 223 5.2514 -2.86797 0.963855
NZ.URZ.HHZ.10 2021-04-05T07:38:27.26 10.0 negative automatic P 249 2.0025 2.0429 0.970874
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