Earthquake with magnitude of Mwp 6.0 on date 12-03-2021 and time 08:54:15 (UTC) in region Fiji [Sea]

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

  • 12-03-2021 08:54:15 (UTC)
  • 12-03-2021 09:54:15 (UTC +01:00) Italian time
  • 12-03-2021 20:54:15 (UTC +12:00) local time in the region of the earthquake (Pacific/Fiji)

and geographic coordinates (lat, lon) -22.366, 174.367 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
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 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 6.2
2021-03-12
08:54:15
-22.3664 174.367 20 2021-03-12
09:12:23
Sala Sismica INGV-Roma 88030291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-12 08:54:15
Latitude -22.3664
Longitude 174.3670
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 88030291

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 12642
Semi-minor axis of confidence ellipse (meter) 8969
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 85
Circular confidence region, given by single value of horizontal uncertainty (meter) 12513.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115.013
Number of associated phases, regardless of their use for origin computation 49
Number of defining phases 49
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.69486
Epicentral distance of station closest to the epicenter (degree) 5.77338
Epicentral distance of station farthest from the epicenter (degree) 94.33204
Number of stations at which the event was observed 45
Number of stations from which data was used for origin computation 45
Magnitudes information

Mwp:6

Field Value
Value 6
Uncertainty 0.3
Num. used stations 11
Type of magnitude Mwp
Reference to an origin 88030291
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-03-12 09:12:23

Mwpd:6.2

Field Value
Value 6.2
Uncertainty 0.1
Num. used stations 7
Type of magnitude Mwpd
Reference to an origin 88030291
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-03-12 09:12:23

mb:5.3

Field Value
Value 5.3
Uncertainty 0.1
Num. used stations 26
Type of magnitude mb
Reference to an origin 88030291
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2021-03-12 09:12:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IU.ANMO.BHZ.00 2021-03-12T09:07:34.75 10.0 positive automatic P 54 94.332 2.35602 0.0609932
US.MNTX.BHZ.00 2021-03-12T09:07:31.33 10.0 positive automatic P 57 93.8209 1.53208 0.06661
US.HLID.BHZ.00 2021-03-12T09:07:25.48 10.0 negative automatic P 43 92.6608 0.792009 0.034677
IU.BILL.BHZ.00 2021-03-12T09:07:24.02 10.0 positive automatic sP 357 90.6162 1.41286 0
US.DUG.BHZ.00 2021-03-12T09:07:21.65 10.0 positive automatic P 47 92.1125 -0.449433 0
IU.COLA.BHZ.00 2021-03-12T09:07:19.92 10.0 negative automatic P 15 91.9516 -1.21934 0.0802756
US.BMO.BHZ.00 2021-03-12T09:07:18.50 10.0 positive automatic P 41 91.5008 -0.710961 0.0861747
US.WUAZ.BHZ.00 2021-03-12T09:07:17.14 10.0 positive automatic P 52 90.962 0.344498 0.0809029
US.HAWA.BHZ.00 2021-03-12T09:07:16.18 10.0 positive automatic P 39 90.9771 -0.477528 0.0835659
US.ELK.BHZ.00 2021-03-12T09:07:15.58 10.0 positive automatic P 46 90.7563 -0.368103 0.0812686
IU.BILL.BHZ.00 2021-03-12T09:07:12.17 10.0 positive automatic P 357 90.6162 -2.79701 0.0803748
IU.TUC.BHZ.00 2021-03-12T09:07:12.55 10.0 positive automatic P 55 89.9443 0.611857 0.0872254
US.WVOR.BHZ.00 2021-03-12T09:07:09.25 10.0 positive automatic P 43 89.4246 -0.324913 0.0992738
BK.CMB.BHZ.00 2021-03-12T09:06:52.50 10.0 positive automatic P 46 85.9516 -0.301628 0.126878
IU.CHTO.BHZ.00 2021-03-12T09:06:45.75 10.0 negative automatic PcP 293 84.3959 0.784347 0.124513
JP.JKA.BHZ. 2021-03-12T09:05:39.80 10.0 positive automatic PcP 335 69.9971 -6.50722 0
IU.QSPA.BHZ.00 2021-03-12T09:05:08.92 10.0 negative automatic P 180 67.569 -0.555318 0.310211
JP.JGF.BHZ. 2021-03-12T09:05:08.45 10.0 negative automatic P 328 67.7346 -1.67704 0.30099
IU.CASY.BHZ.00 2021-03-12T09:04:13.47 10.0 positive automatic P 205 59.1708 0.080843 0.423327
GT.VNDA.BHZ.00 2021-03-12T09:03:53.25 10.0 negative automatic pP 183 55.4794 -0.334109 0
IU.SBA.BHZ.00 2021-03-12T09:03:51.15 10.0 negative automatic P 182 55.5994 2.94166 0.449965
AU.MORW.BHZ. 2021-03-12T09:03:27.32 10.0 negative automatic P 250 52.4598 1.99313 0.242923
IU.MBWA.BHZ.00 2021-03-12T09:03:09.12 10.0 negative automatic P 260 50.4666 -1.26661 0.552507
AU.FITZ.BHZ. 2021-03-12T09:02:32.70 10.0 positive automatic P 266 45.7275 -1.04194 0.62602
AU.MTN.BHZ.00 2021-03-12T09:02:07.13 10.0 positive automatic P 276 42.1408 2.18534 0
AU.FORT.BHZ.00 2021-03-12T09:02:03.85 10.0 negative automatic P 248 41.9628 0.358721 0.709922
AU.WRKA.BHZ.00 2021-03-12T09:02:02.85 10.0 positive automatic P 257 42.0681 -1.5813 0.646382
AU.KDU.BHZ.00 2021-03-12T09:01:53.70 10.0 negative automatic P 276 40.9606 -1.54959 0.259433
II.WRAB.BHZ.00 2021-03-12T09:01:22.02 10.0 negative automatic P 266 37.2832 -2.53481 0.810247
AU.HTT.BHZ. 2021-03-12T09:00:47.05 10.0 positive automatic P 243 33.0293 -0.928803 0.90941
II.TAU.BHZ.00 2021-03-12T09:00:25.97 10.0 positive automatic P 221 30.4195 1.04159 0.921518
AU.QLP.BHZ. 2021-03-12T08:59:59.82 10.0 negative automatic P 255 27.681 -0.79866 0.43956
IU.CTAO.BHZ.00 2021-03-12T08:59:46.00 10.0 negative automatic P 270 26.2655 -0.917091 0.43956
G.CAN.BHZ.00 2021-03-12T08:59:41.25 10.0 negative automatic P 234 25.6058 -0.743175 0.344828
AU.RIV.BHZ. 2021-03-12T08:59:21.00 10.0 negative automatic P 236 23.3802 0.539256 0
NZ.ODZ.HHZ.10 2021-03-12T08:59:16.89 10.0 positive automatic P 187 22.8806 0.657665 0.869565
AU.ARMA.BHZ. 2021-03-12T08:59:04.97 10.0 negative automatic P 244 21.8488 -0.432661 0.43956
AU.EIDS.BHZ. 2021-03-12T08:59:01.30 10.0 negative automatic P 257 21.4761 0.0449115 0
NZ.KHZ.HHZ.10 2021-03-12T08:58:47.04 10.0 positive automatic P 182 20.0606 1.12903 0.97561
IU.SNZO.BHZ.00 2021-03-12T08:58:33.72 10.0 negative automatic P 179 18.9436 0.00750094 0.733945
NZ.URZ.HHZ.10 2021-03-12T08:58:00.77 10.0 negative automatic P 172 16.0671 2.09063 0.293686
NZ.OUZ.HHZ.10 2021-03-12T08:57:15.83 10.0 positive automatic P 183 12.8721 0.0741554 0.985222
G.SANVU.BHZ.00 2021-03-12T08:56:36.05 10.0 positive automatic P 314 9.681 3.95382 0.869565
ND.KOUNC.BHZ.00 2021-03-12T08:56:32.05 10.0 negative automatic P 279 9.5539 1.68916 0.43956
AU.NFK.BHZ.00 2021-03-12T08:56:19.42 10.0 positive automatic P 220 8.8348 -1.0981 0.970874
II.MSVF.BHZ.00 2021-03-12T08:55:37.67 10.0 positive automatic P 37 5.7734 -0.935204 0.97561
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