Earthquake with magnitude of Mwp 6.3 on date 06-01-2021 and time 07:20:34 (Italy) in region New Zealand [Sea]

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

  • 06-01-2021 06:20:34 (UTC)
  • 06-01-2021 07:20:34 (UTC +01:00) Italian time
  • 06-01-2021 19:20:34 (UTC +13:00) local time in the region of the earthquake (Pacific/Tongatapu)

and geographic coordinates (lat, lon) -28.88, -177.16 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 5.4
Mwp 6.3

Mwpd 6.5
2021-01-06
06:20:34
-28.88 -177.16 20 2021-01-06
06:44:11
Sala Sismica INGV-Roma 86044721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-06 06:20:34
Latitude -28.88
Longitude -177.16
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 86044721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 27733
Semi-minor axis of confidence ellipse (meter) 15657
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 133
Circular confidence region, given by single value of horizontal uncertainty (meter) 22816.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 116.436
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 38
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 2.92188
Epicentral distance of station closest to the epicenter (degree) 0.76342
Epicentral distance of station farthest from the epicenter (degree) 68.50438
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 35
Magnitudes information

Mwpd:6.5

Field Value
Value 6.5
Uncertainty 0.2
Num. used stations 13
Type of magnitude Mwpd
Reference to an origin 86044721
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-01-06 06:44:11

Mwp:6.3

Field Value
Value 6.3
Uncertainty 0.1
Num. used stations 14
Type of magnitude Mwp
Reference to an origin 86044721
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-01-06 06:44:11

mb:5.4

Field Value
Value 5.4
Uncertainty 0.1
Num. used stations 25
Type of magnitude mb
Reference to an origin 86044721
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-01-06 06:44:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.BKB.BHZ. 2021-01-06T06:31:33.62 10.0 positive automatic P 281 68.5044 -0.214499 0
GE.JAGI.BHZ. 2021-01-06T06:31:23.77 10.0 positive automatic P 273 67.2932 -2.4465 0.24855
II.KAPI.BHZ.00 2021-01-06T06:31:03.77 10.0 positive automatic P 279 64.0796 -1.73652 0.310694
AU.GIRL.BHZ.00 2021-01-06T06:30:47.10 10.0 negative automatic P 259 61.2615 0.423977 0.403125
GE.SANI.BHZ. 2021-01-06T06:30:37.27 10.0 positive automatic P 286 60.2732 -2.66988 0.263293
GE.SOEI.BHZ. 2021-01-06T06:30:23.57 10.0 positive automatic P 277 57.8667 0.143022 0.387157
AU.MORW.BHZ. 2021-01-06T06:30:19.67 10.0 positive automatic P 252 57.573 -1.56777 0.446835
IU.MBWA.BHZ.00 2021-01-06T06:30:16.32 10.0 positive automatic P 262 57.0602 -1.27847 0.449167
IU.CASY.BHZ.00 2021-01-06T06:30:15.22 10.0 positive automatic P 207 56.6834 0.32752 0.460198
IU.NWAO.BHZ.00 2021-01-06T06:30:06.20 10.0 positive automatic P 248 55.514 -0.399404 0.436495
G.KIP.BHZ.00 2021-01-06T06:29:51.95 10.0 negative automatic P 22 53.5788 -0.547825 0.520778
AU.FITZ.BHZ. 2021-01-06T06:29:47.33 10.0 positive automatic P 268 53.0593 -1.35042 0.46171
AU.MTN.BHZ.00 2021-01-06T06:29:27.80 10.0 positive automatic P 277 50.4707 -1.55837 0.258007
GT.VNDA.BHZ.00 2021-01-06T06:29:26.43 10.0 negative automatic P 186 49.589 3.76095 0.580731
IU.SBA.BHZ.00 2021-01-06T06:29:26.67 10.0 positive automatic sP 184 49.515 4.57975 0.542761
AU.WRKA.BHZ.00 2021-01-06T06:29:11.40 10.0 positive automatic P 261 48.343 -1.79542 0.609579
AU.FORT.BHZ.00 2021-01-06T06:29:01.83 10.0 negative automatic P 253 47.0734 -1.44257 0.632164
II.WRAB.BHZ.00 2021-01-06T06:28:43.67 10.0 positive automatic P 270 44.7333 -1.17261 0.658801
AU.HTT.BHZ. 2021-01-06T06:27:46.35 10.0 positive automatic P 252 37.5788 0.276009 0.804284
IU.CTAO.BHZ.00 2021-01-06T06:27:18.85 10.0 positive automatic P 276 34.2829 1.06828 0.871985
AU.QLP.BHZ. 2021-01-06T06:27:16.15 10.0 positive automatic P 264 34.0946 0.0315427 0.705851
AU.MILA.BHZ.00 2021-01-06T06:26:35.73 10.0 negative automatic P 245 29.2455 2.12304 0.930233
G.CAN.BHZ.00 2021-01-06T06:26:35.60 10.0 positive automatic P 249 29.2308 2.14365 0.930233
AU.EIDS.BHZ. 2021-01-06T06:26:26.00 10.0 positive automatic P 270 28.3939 1.06009 0.43956
AU.ARMA.BHZ. 2021-01-06T06:26:17.27 10.0 positive automatic P 259 27.0788 2.94772 0.930233
IU.SNZO.BHZ.00 2021-01-06T06:26:16.27 10.0 negative automatic S 206 14.0833 -9.48469 0
G.SANVU.BHZ.00 2021-01-06T06:25:00.65 10.0 positive automatic P 310 19.706 -0.342734 0.43956
ND.KOUNC.BHZ.00 2021-01-06T06:24:55.20 10.0 positive automatic P 292 18.762 -0.963829 0
NZ.ODZ.HHZ.10 2021-01-06T06:24:49.64 10.0 positive automatic P 208 18.8254 -1.75502 0.980392
IU.RAR.BHZ.00 2021-01-06T06:24:35.05 10.0 negative automatic P 68 17.4925 -0.552071 0.869565
ND.MARNC.BHZ.00 2021-01-06T06:24:14.45 10.0 positive automatic P 296 15.2848 -3.22552 0
NZ.KHZ.HHZ.10 2021-01-06T06:24:03.92 10.0 positive automatic P 207 15.4802 -6.09733 0.980392
II.MSVF.BHZ.00 2021-01-06T06:23:25.42 10.0 negative automatic P 337 11.9635 3.0035 0.909091
NZ.URZ.HHZ.10 2021-01-06T06:22:57.98 10.0 positive automatic P 205 10.5204 -4.57375 0.985222
IU.RAO.BHZ.00 2021-01-06T06:20:51.70 10.0 negative automatic P 241 0.7634 4.24815 0.963855
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