Earthquake with magnitude of Mwp 6.0 on date 28-02-2021 and time 20:37:42 (UTC) in region New Caledonia [Sea]

A magnitude Mwp 6.0 earthquake occured in region: New Caledonia [Sea], on

  • 28-02-2021 20:37:42 (UTC)
  • 28-02-2021 21:37:42 (UTC +01:00) Italian time
  • 01-03-2021 07:37:42 (UTC +11:00) local time in the region of the earthquake (Pacific/Noumea)

and geographic coordinates (lat, lon) -22.86, 172.41 at 20 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 5.3
Mwp 6.0

Mwpd 6.0
2021-02-28
20:37:42
-22.86 172.41 20 2021-02-28
21:00:35
Sala Sismica INGV-Roma 87581491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-28 20:37:42
Latitude -22.86
Longitude 172.41
Depth (km) 20 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 87581491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 11969
Semi-minor axis of confidence ellipse (meter) 10183
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 12088.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85.4106
Number of associated phases, regardless of their use for origin computation 42
Number of defining phases 42
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.64664
Epicentral distance of station closest to the epicenter (degree) 7.35642
Epicentral distance of station farthest from the epicenter (degree) 91.70646
Number of stations at which the event was observed 41
Number of stations from which data was used for origin computation 41
Magnitudes information

Mwp:6

Field Value
Value 6
Uncertainty 0.1
Num. used stations 12
Type of magnitude Mwp
Reference to an origin 87581491
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-02-28 21:00:35

Mwpd:6

Field Value
Value 6
Uncertainty 0.1
Num. used stations 7
Type of magnitude Mwpd
Reference to an origin 87581491
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-02-28 21:00:35

mb:5.3

Field Value
Value 5.3
Uncertainty 0.2
Num. used stations 31
Type of magnitude mb
Reference to an origin 87581491
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-02-28 21:00:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IU.TUC.BHZ.00 2021-02-28T20:50:45.45 10.0 positive automatic P 55 91.7065 -1.69009 0.0808715
US.WVOR.BHZ.00 2021-02-28T20:50:43.53 10.0 negative automatic P 44 91.0192 -0.502593 0.0833007
G.COYC.BHZ.00 2021-02-28T20:50:39.85 10.0 negative automatic P 141 90.0164 0.684372 0.0918146
US.TPNV.BHZ.00 2021-02-28T20:50:36.33 10.0 positive automatic P 49 89.8747 -2.41193 0.0906553
AK.GAMB.BHZ. 2021-02-28T20:50:24.83 10.0 positive automatic P 7 87.5226 -2.54029 0.109739
IU.CHTO.BHZ.00 2021-02-28T20:50:02.72 10.0 positive automatic P 294 82.9346 -1.76194 0.134286
GE.GSI.BHZ. 2021-02-28T20:49:29.27 10.0 negative automatic P 277 76.573 -0.664518 0.203579
AU.MAW.BHZ. 2021-02-28T20:49:27.73 10.0 positive automatic P 202 76.0078 1.01884 0.209241
MY.KUM.BHZ. 2021-02-28T20:49:21.82 10.0 positive automatic P 282 75.4394 -1.64698 0.220132
MY.IPM.BHZ. 2021-02-28T20:49:17.72 10.0 positive automatic P 282 74.7547 -1.82981 0.203169
MY.SBM.BHZ. 2021-02-28T20:48:10.57 10.0 positive automatic P 285 63.8331 -1.35905 0.327202
MY.KKM.BHZ. 2021-02-28T20:47:58.12 10.0 positive automatic P 291 62.034 -1.95038 0.342069
GE.JAGI.BHZ. 2021-02-28T20:47:27.42 10.0 positive automatic P 275 57.5383 -1.6102 0.447354
AU.GIRL.BHZ.00 2021-02-28T20:46:58.93 10.0 negative automatic P 258 53.2717 0.624963 0.513276
GE.LUWI.BHZ. 2021-02-28T20:46:53.87 10.0 positive automatic P 287 52.862 -1.39128 0.485189
AU.MORW.BHZ. 2021-02-28T20:46:37.62 10.0 positive automatic P 250 50.5942 -0.764685 0.556958
GE.MMRI.BHZ. 2021-02-28T20:46:33.52 10.0 positive automatic P 278 50.0711 -0.872107 0.539987
GE.SANI.BHZ. 2021-02-28T20:46:28.47 10.0 positive automatic P 288 49.5554 -1.98425 0.574386
IU.NWAO.BHZ.00 2021-02-28T20:46:26.70 10.0 positive automatic P 245 49.2385 -1.40108 0.593896
IU.MBWA.BHZ.00 2021-02-28T20:46:22.45 10.0 positive automatic P 261 48.6055 -0.75748 0.604963
GE.SOEI.BHZ. 2021-02-28T20:46:17.67 10.0 negative automatic P 278 47.7923 0.600543 0.552008
AU.FITZ.BHZ. 2021-02-28T20:45:46.10 10.0 negative automatic P 267 43.8959 -0.0530967 0.674052
AU.FORT.BHZ.00 2021-02-28T20:45:14.18 10.0 positive automatic P 249 40.1018 -1.00475 0.727995
AU.KDU.BHZ.00 2021-02-28T20:45:05.48 10.0 positive automatic P 278 39.2306 -2.43528 0.771385
II.WRAB.BHZ.00 2021-02-28T20:44:33.45 10.0 negative automatic P 267 35.452 -2.4799 0.857995
AU.HTT.BHZ. 2021-02-28T20:43:58.70 10.0 positive automatic P 243 31.1989 -0.220716 0.894692
II.TAU.BHZ.00 2021-02-28T20:43:39.27 10.0 negative automatic P 220 28.8706 1.0471 0.909091
AU.QLP.BHZ. 2021-02-28T20:43:10.52 10.0 positive automatic P 256 25.8093 -0.250338 0.842105
AU.MILA.BHZ.00 2021-02-28T20:43:00.70 10.0 negative automatic P 229 24.5332 1.43154 0.941176
IU.CTAO.BHZ.00 2021-02-28T20:42:59.00 10.0 negative automatic P 272 24.4647 1.42352 0.963855
G.CAN.BHZ.00 2021-02-28T20:42:54.10 10.0 positive automatic P 233 23.8594 0.992211 0.952381
NZ.ODZ.HHZ.10 2021-02-28T20:42:36.29 10.0 positive automatic P 183 22.2313 -0.0630215 0.888889
AU.ARMA.BHZ. 2021-02-28T20:42:14.60 10.0 negative automatic P 243 20.013 2.0129 0.941176
NZ.KHZ.HHZ.10 2021-02-28T20:42:09.16 10.0 positive automatic P 178 19.579 1.48796 0.921659
AU.EIDS.BHZ. 2021-02-28T20:42:09.55 10.0 positive automatic P 258 19.6069 1.54455 0.952381
IU.SNZO.BHZ.00 2021-02-28T20:41:55.90 10.0 negative automatic P 175 18.5494 -0.496942 0.851064
AU.LHI.BHZ.00 2021-02-28T20:41:15.40 10.0 positive automatic P 231 14.6761 -3.57381 0
NZ.OUZ.HHZ.10 2021-02-28T20:40:36.90 10.0 positive automatic P 175 12.4054 0.510059 0.985222
G.SANVU.BHZ.00 2021-02-28T20:39:52.45 10.0 positive automatic P 326 8.8924 4.15736 0.909091
II.MSVF.BHZ.00 2021-02-28T20:39:27.42 10.0 positive automatic P 47 7.3564 0.0664232 0.930233
AU.NFK.BHZ.00 2021-02-28T20:39:26.10 10.0 positive automatic P 212 7.3747 -1.40208 0.961538
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