Earthquake with magnitude of Mwp 6.1 on date 11-02-2021 and time 09:22:13 (Italy) in region New Caledonia [Sea]

A magnitude Mwp 6.1 earthquake occured in region: New Caledonia [Sea], on

  • 11-02-2021 08:22:13 (UTC)
  • 11-02-2021 09:22:13 (UTC +01:00) Italian time
  • 11-02-2021 19:22:13 (UTC +11:00) local time in the region of the earthquake (Pacific/Noumea)

and geographic coordinates (lat, lon) -22.91, 171.27 at 17 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 6.1

Mwpd 6.5
2021-02-11
08:22:13
-22.91 171.27 17 2021-02-11
08:41:28
Sala Sismica INGV-Roma 87036761
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-11 08:22:13
Latitude -22.91
Longitude 171.27
Depth (km) 17 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 87036761

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 12044
Semi-minor axis of confidence ellipse (meter) 11601
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 330
Circular confidence region, given by single value of horizontal uncertainty (meter) 13372.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99.6276
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 44
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.50581
Epicentral distance of station closest to the epicenter (degree) 6.82669
Epicentral distance of station farthest from the epicenter (degree) 99.02524
Number of stations at which the event was observed 41
Number of stations from which data was used for origin computation 41
Magnitudes information

Mwpd:6.5

Field Value
Value 6.5
Uncertainty 0.2
Num. used stations 5
Type of magnitude Mwpd
Reference to an origin 87036761
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-02-11 08:41:28

Mwp:6.1

Field Value
Value 6.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude Mwp
Reference to an origin 87036761
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-02-11 08:41:28

mb:5.3

Field Value
Value 5.3
Uncertainty 0.2
Num. used stations 25
Type of magnitude mb
Reference to an origin 87036761
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-02-11 08:41:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
US.RLMT.BHZ.00 2021-02-11T08:35:51.48 10.0 positive automatic P 45 99.0252 -0.360587 0.04154
IU.ANMO.BHZ.00 2021-02-11T08:35:42.02 10.0 negative automatic P 55 96.9695 -0.529236 0.0512903
US.MNTX.BHZ.00 2021-02-11T08:35:39.55 10.0 positive automatic P 58 96.5253 -0.744008 0.0529168
US.HLID.BHZ.00 2021-02-11T08:35:32.35 10.0 positive automatic P 44 95.0322 -1.38084 0.0614189
US.WUAZ.BHZ.00 2021-02-11T08:35:26.68 10.0 positive automatic P 53 93.55 -0.218877 0
US.BMO.BHZ.00 2021-02-11T08:35:26.28 10.0 positive automatic P 42 93.8079 -1.7296 0.0699165
US.ELK.BHZ.00 2021-02-11T08:35:24.40 10.0 positive automatic P 47 93.1904 -0.946129 0.068699
US.HAWA.BHZ.00 2021-02-11T08:35:23.45 10.0 negative automatic P 40 93.2172 -1.70107 0.0717361
IU.TUC.BHZ.00 2021-02-11T08:35:22.02 10.0 negative automatic P 56 92.6001 -0.377528 0.0763136
IU.COLA.BHZ.00 2021-02-11T08:35:20.80 10.0 positive automatic P 16 93.2423 -4.44363 0.0715881
US.WVOR.BHZ.00 2021-02-11T08:35:17.30 10.0 negative automatic P 44 91.7804 -1.38318 0.0744146
IN.SHL.HHZ. 2021-02-11T08:35:13.84 10.0 positive automatic P 298 90.8763 -0.420031 0.0657386
IU.ULN.BHZ.00 2021-02-11T08:35:13.07 10.0 positive automatic P 323 91.1351 -2.66973 0.0637891
BK.CMB.BHZ.00 2021-02-11T08:35:01.20 10.0 positive automatic P 47 88.395 -1.57129 0.101851
BK.SAO.BHZ.00 2021-02-11T08:34:55.17 10.0 negative automatic P 48 87.014 -0.921848 0.111741
GE.SNAA.BHZ. 2021-02-11T08:34:47.36 10.0 positive automatic P 182 85.3298 -0.513171 0.110456
IU.CHTO.BHZ.00 2021-02-11T08:34:30.52 10.0 positive automatic P 294 81.9974 -0.199315 0.143287
RM.SLV.BHZ. 2021-02-11T08:34:15.12 10.0 negative automatic P 299 79.1211 -0.212859 0.171154
MY.IPM.BHZ. 2021-02-11T08:33:45.07 10.0 positive automatic P 282 73.7387 0.315792 0.213039
IU.QSPA.BHZ.00 2021-02-11T08:33:03.47 10.0 negative automatic P 180 67.0257 -0.700846 0.100902
IU.MAJO.BHZ.00 2021-02-11T08:33:02.12 10.0 negative automatic P 332 67.1438 -2.3797 0.288193
MY.KKM.BHZ. 2021-02-11T08:32:25.22 10.0 positive automatic P 291 61.0723 0.514303 0.369897
MY.LDM.BHZ. 2021-02-11T08:32:10.52 10.0 negative automatic P 292 58.6755 2.40809 0.401979
GE.SANI.BHZ. 2021-02-11T08:30:53.27 10.0 negative automatic P 289 48.5752 -0.787456 0.539836
IU.MBWA.BHZ.00 2021-02-11T08:30:46.50 10.0 positive automatic P 262 47.5605 0.253311 0.601618
GE.SOEI.BHZ. 2021-02-11T08:30:41.37 10.0 positive automatic P 278 46.7603 1.22058 0.556533
GE.FAKI.BHZ. 2021-02-11T08:30:06.62 10.0 positive automatic P 292 42.7319 -1.24986 0.679544
AU.MTN.BHZ.00 2021-02-11T08:29:39.78 10.0 positive automatic P 278 39.3658 -0.388806 0.742097
AU.KDU.BHZ.00 2021-02-11T08:29:30.15 10.0 positive automatic P 279 38.1998 -0.221181 0.782605
II.WRAB.BHZ.00 2021-02-11T08:28:56.27 10.0 negative automatic P 268 34.4018 -1.70176 0.839366
NZ.URZ.HHZ.10 2021-02-11T08:28:47.96 10.0 positive automatic S 163 16.1445 -7.24484 0
AU.HTT.BHZ. 2021-02-11T08:28:22.15 10.0 positive automatic P 242 30.245 0.540364 0.894232
AU.QLP.BHZ. 2021-02-11T08:27:32.32 10.0 negative automatic P 256 24.7798 -0.197829 0.851064
AU.MILA.BHZ.00 2021-02-11T08:27:23.68 10.0 negative automatic P 228 23.7108 0.810064 0.91954
IU.CTAO.BHZ.00 2021-02-11T08:27:19.95 10.0 negative automatic P 272 23.4178 -0.0573383 0.888889
G.CAN.BHZ.00 2021-02-11T08:27:16.25 10.0 negative automatic P 232 22.9939 0.650926 0.909091
NZ.KHZ.HHZ.10 2021-02-11T08:26:38.97 10.0 positive automatic P 175 19.5984 0.0064349 0.970874
AU.ARMA.BHZ. 2021-02-11T08:26:35.42 10.0 positive automatic pP 243 19.0559 2.21484 0.952381
IU.AFI.BHZ.00 2021-02-11T08:26:24.52 10.0 positive automatic P 64 18.4042 -1.45373 0.941176
NZ.URZ.HHZ.10 2021-02-11T08:25:58.12 10.0 positive automatic P 163 16.1445 0.386833 0.819672
II.MSVF.BHZ.00 2021-02-11T08:24:12.62 10.0 positive automatic P 52 8.1876 2.83118 0.952381
AU.NFK.BHZ.00 2021-02-11T08:23:48.86 10.0 negative automatic P 205 6.8267 -2.14979 0.917431
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