Earthquake with magnitude of Mwp 6.5 on date 20-06-2021 and time 17:05:48 (UTC) in region Kermadec Islands, New Zealand [Sea: New Zealand]

A magnitude Mwp 6.5 earthquake occured in region: Kermadec Islands, New Zealand [Sea: New Zealand], on

  • 20-06-2021 17:05:48 (UTC)
  • 20-06-2021 19:05:48 (UTC +02:00) Italian time
  • 21-06-2021 06:05:48 (UTC +13:00) local time in the region of the earthquake (Pacific/Tongatapu)

and geographic coordinates (lat, lon) -29.981, -177.763 at 6 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 updated as more data become available. See http://shakemap.ingv.it for additional information. The black star indicates the epicenter. The triangles show the accelerometric and velocimetric stations used in the calculation, colored according to the recorded shaking.

Intensity Shakemap

Intensity Shakemap

This map shows the distribution of instrumental intensities. The intensity is derived through an empirical law that correlates the recorded values of actual ground shaking, e.g., acceleration and velocity, with the macroseismic intensity for Italian earthquakes, as reported in the Italian Macroseismic Database (DBMI15, https://doi.org/10.13127/cpti/cpti15.3).
Peak ground acceleration Shakemap

Peak ground acceleration Shakemap

This map shows the distribution of peak ground acceleration expressed as percent 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
mb 5.7
Mwp 6.5

Mwpd 6.5
2021-06-20
17:05:48
-29.9812 -177.763 6 2021-06-20
17:28:20
Sala Sismica INGV-Roma 91610221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-20 17:05:48
Latitude -29.9812
Longitude -177.7630
Depth (km) 6 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 91610221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 19880
Semi-minor axis of confidence ellipse (meter) 2510
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 318
Circular confidence region, given by single value of horizontal uncertainty (meter) 16087
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85.1617
Number of associated phases, regardless of their use for origin computation 55
Number of defining phases 55
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.88734
Epicentral distance of station closest to the epicenter (degree) 16.99405
Epicentral distance of station farthest from the epicenter (degree) 78.29975
Number of stations at which the event was observed 49
Number of stations from which data was used for origin computation 49
Magnitudes information

Mwpd:6.5

Field Value
Value 6.5
Uncertainty 0.2
Num. used stations 32
Type of magnitude Mwpd
Reference to an origin 91610221
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-06-20 17:28:20

Mwp:6.5

Field Value
Value 6.5
Uncertainty 0.2
Num. used stations 34
Type of magnitude Mwp
Reference to an origin 91610221
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-06-20 17:28:20

mb:5.7

Field Value
Value 5.7
Uncertainty 0.2
Num. used stations 41
Type of magnitude mb
Reference to an origin 91610221
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-06-20 17:28:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.SNAA.BHZ. 2021-06-20T17:17:47.11 10.0 positive automatic P 178 78.2822 -1.12299 0.0267997
IU.MAJO.BHZ.00 2021-06-20T17:17:46.67 10.0 positive automatic P 325 78.2997 -1.58648 0
G.INU.BHZ.00 2021-06-20T17:17:44.91 10.0 positive automatic P 324 77.9548 -1.38421 0.18226
IU.PMSA.BHZ.00 2021-06-20T17:17:14.37 10.0 positive automatic P 156 72.3229 0.556242 0.22764
GE.SMRI.BHZ. 2021-06-20T17:17:04.32 10.0 positive automatic P 273 70.736 0.0508563 0.254727
JP.JCJ.BHZ. 2021-06-20T17:16:49.90 10.0 positive automatic P 322 68.7341 -2.02687 0.191745
GE.JAGI.BHZ. 2021-06-20T17:16:37.82 10.0 positive automatic P 274 66.833 -2.12817 0.292449
II.KAPI.BHZ.00 2021-06-20T17:16:19.10 10.0 positive automatic P 280 63.7464 -0.860224 0.348024
GE.LUWI.BHZ. 2021-06-20T17:16:16.02 10.0 positive automatic P 285 63.3121 -1.01728 0.341873
AU.GIRL.BHZ.00 2021-06-20T17:15:58.25 10.0 negative automatic P 259 60.5375 -0.144585 0.40471
GE.TNTI.BHZ. 2021-06-20T17:15:57.12 10.0 positive automatic P 290 60.5481 -1.33563 0.377589
IU.QSPA.BHZ.00 2021-06-20T17:15:54.32 10.0 positive automatic P 180 59.96 -0.589084 0.394178
GE.SANI.BHZ. 2021-06-20T17:15:53.67 10.0 positive automatic P 287 60.0765 -1.55296 0.383861
GE.MMRI.BHZ. 2021-06-20T17:15:51.82 10.0 positive automatic P 278 59.784 -1.41283 0.342156
GE.SOEI.BHZ. 2021-06-20T17:15:38.02 10.0 positive automatic P 278 57.489 0.617416 0.377268
AU.MORW.BHZ. 2021-06-20T17:15:30.52 10.0 positive automatic P 253 56.7442 -1.47952 0.460332
IU.GUMO.BHZ.00 2021-06-20T17:15:28.95 10.0 negative automatic P 315 56.5128 -1.39017 0.423506
IU.MBWA.BHZ.00 2021-06-20T17:15:28.50 10.0 positive automatic P 263 56.4038 -1.06704 0.444338
GE.BNDI.BHZ. 2021-06-20T17:15:21.77 10.0 positive automatic P 287 55.4521 -0.944115 0.221583
IU.CASY.BHZ.00 2021-06-20T17:15:20.17 10.0 positive automatic P 208 55.4633 -2.62395 0.458108
G.KIP.BHZ.00 2021-06-20T17:15:19.50 10.0 negative automatic P 23 54.7983 1.48509 0.478852
IU.NWAO.BHZ.00 2021-06-20T17:15:15.22 10.0 positive automatic P 249 54.6231 -1.5664 0.460128
IU.POHA.BHZ.00 2021-06-20T17:15:14.55 10.0 positive automatic P 26 54.1463 0.951746 0.472373
AU.FITZ.BHZ. 2021-06-20T17:15:02.38 10.0 positive automatic P 269 52.516 1.09701 0.496969
IU.WAKE.BHZ.00 2021-06-20T17:14:52.60 10.0 positive automatic P 341 51.4984 -1.08734 0.250684
AU.MTN.BHZ.00 2021-06-20T17:14:42.38 10.0 positive automatic P 278 50.1048 -0.825955 0.46184
AU.KDU.BHZ.00 2021-06-20T17:14:34.55 10.0 positive automatic P 280 49.0336 -0.463307 0.577551
IU.SBA.BHZ.00 2021-06-20T17:14:30.82 10.0 positive automatic P 184 48.3748 0.870885 0.588709
GT.VNDA.BHZ.00 2021-06-20T17:14:30.08 10.0 positive automatic P 186 48.4381 -0.372964 0.48494
GE.GENI.BHZ. 2021-06-20T17:14:29.27 10.0 positive automatic P 296 48.3196 -0.253267 0.544784
AU.WRKA.BHZ.00 2021-06-20T17:14:23.20 10.0 negative automatic P 262 47.6657 -1.35965 0.593849
AU.FORT.BHZ.00 2021-06-20T17:14:12.53 10.0 positive automatic P 255 46.2677 -1.02758 0.632548
II.WRAB.BHZ.00 2021-06-20T17:13:56.77 10.0 positive automatic P 272 44.2291 -0.630904 0.65367
IU.RAR.BHZ.00 2021-06-20T17:13:16.92 10.0 negative automatic S 66 18.4065 -11.1499 0
AU.RABL.BHZ.00 2021-06-20T17:13:06.88 10.0 positive automatic P 306 38.3606 -2.29214 0.790015
IU.XMAS.BHZ.00 2021-06-20T17:13:04.10 10.0 negative automatic P 35 37.4419 2.73038 0.780243
AU.HTT.BHZ. 2021-06-20T17:12:55.67 10.0 positive automatic P 253 36.7472 0.093737 0.767073
IU.CTAO.BHZ.00 2021-06-20T17:12:32.87 10.0 positive automatic P 278 33.9089 1.77981 0.892053
AU.QLP.BHZ. 2021-06-20T17:12:28.15 10.0 positive automatic P 266 33.4852 0.766169 0.769698
II.TAU.BHZ.00 2021-06-20T17:12:02.22 10.0 positive automatic P 235 30.6322 -0.0924231 0.940359
IU.HNR.BHZ.00 2021-06-20T17:11:49.40 10.0 positive automatic P 310 29.2407 -0.595088 0.860215
G.PPTF.BHZ.00 2021-06-20T17:11:45.55 10.0 positive automatic P 71 28.5111 1.94088 0.930233
AU.MILA.BHZ.00 2021-06-20T17:11:43.28 10.0 negative automatic P 247 28.3171 1.38062 0.941176
G.CAN.BHZ.00 2021-06-20T17:11:43.55 10.0 positive automatic P 250 28.3542 1.33989 0.930233
AU.RIV.BHZ. 2021-06-20T17:11:28.90 10.0 positive automatic P 254 26.5596 2.89171 0.43956
AU.ARMA.BHZ. 2021-06-20T17:11:27.20 10.0 positive automatic P 261 26.3748 2.67385 0.952381
AU.LHI.BHZ.00 2021-06-20T17:10:24.58 10.0 positive automatic P 260 19.9388 4.61291 0.43956
G.SANVU.BHZ.00 2021-06-20T17:10:22.90 10.0 positive automatic P 313 20.0444 1.78952 0.930233
IU.RAR.BHZ.00 2021-06-20T17:10:01.92 10.0 positive automatic pP 66 18.4065 -1.2091 0.91954
IU.AFI.BHZ.00 2021-06-20T17:09:41.45 10.0 positive automatic P 20 16.9941 -4.33392 0.963855
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