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) -28.877, -177.164 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 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 5.4
Mwp 6.3

Mwpd 6.5
2021-01-06
06:20:34
-28.8773 -177.164 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 -28.8773
Longitude -177.1640
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
IU.SBA.BHZ.00 2021-01-06T06:29:26.67 10.0 positive automatic sP 184 49.515 4.57975 0.542761
GT.VNDA.BHZ.00 2021-01-06T06:29:26.43 10.0 negative automatic P 186 49.589 3.76095 0.580731
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
G.CAN.BHZ.00 2021-01-06T06:26:35.60 10.0 positive automatic P 249 29.2308 2.14365 0.930233
AU.MILA.BHZ.00 2021-01-06T06:26:35.73 10.0 negative automatic P 245 29.2455 2.12304 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 2021-01-06T06:20:51.77 10.0 negative automatic P 241 0.7634 4.32315 0
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