Earthquake with magnitude of Mwp 6.0 on date 23-04-2019 and time 14:20:19 (UTC) in region Tonga [Sea]

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

  • 23-04-2019 14:20:19 (UTC)
  • 23-04-2019 16:20:19 (UTC +02:00) Italian time
  • 24-04-2019 03:20:19 (UTC +13:00) local time in the region of the earthquake (Pacific/Tongatapu)

and geographic coordinates (lat, lon) -24.47, -178.84 at 394 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
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
Rev 100 mb 5.4
Mwp 6.0

Mwpd 6.1
2019-04-23
14:20:19
-24.47 -178.84 394 2019-04-23
14:34:57
Sala Sismica INGV-Roma 67891051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-04-23 14:20:19
Latitude -24.47
Longitude -178.84
Depth (km) 394 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 67891051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 14010
Semi-minor axis of confidence ellipse (meter) 10673
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 5
Circular confidence region, given by single value of horizontal uncertainty (meter) 13638.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 74.7774
Number of associated phases, regardless of their use for origin computation 65
Number of defining phases 65
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.12308
Epicentral distance of station closest to the epicenter (degree) 7.3215
Epicentral distance of station farthest from the epicenter (degree) 69.56623
Number of stations at which the event was observed 56
Number of stations from which data was used for origin computation 56
Magnitudes information

Mwpd:6.1

Field Value
Value 6.1
Uncertainty 0.1
Num. used stations 20
Type of magnitude Mwpd
Reference to an origin 67891051
Agency INGV
Autore Auto added
Time of creation (UTC) 2019-04-23 14:34:57

Mwp:6

Field Value
Value 6
Uncertainty 0.1
Num. used stations 23
Type of magnitude Mwp
Reference to an origin 67891051
Agency INGV
Autore Auto added
Time of creation (UTC) 2019-04-23 14:34:57

mb:5.4

Field Value
Value 5.4
Uncertainty 0.2
Num. used stations 43
Type of magnitude mb
Reference to an origin 67891051
Agency INGV
Autore Auto added
Time of creation (UTC) 2019-04-23 14:34:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GE.SMRI.BHZ. 2019-04-23T14:30:46.82 10.0 negative automatic P 271 69.5662 1.03797 0.132334
GE.BKB.BHZ. 2019-04-23T14:30:26.77 10.0 negative automatic P 280 66.2151 1.6333 0
GE.JAGI.BHZ. 2019-04-23T14:30:20.62 10.0 positive automatic P 272 65.627 -0.825545 0.320448
JP.JCJ.BHZ. 2019-04-23T14:30:09.45 10.0 positive automatic P 321 63.8129 -0.419604 0.335593
C1.VA02.BHZ. 2019-04-23T14:29:57.68 10.0 positive automatic P 109 61.7061 1.55079 0.283625
II.KAPI.BHZ.00 2019-04-23T14:29:58.15 10.0 negative automatic P 278 61.9568 0.329584 0.367327
GE.LUWI.BHZ. 2019-04-23T14:29:52.07 10.0 negative automatic P 283 61.0167 0.510368 0.388683
AU.GIRL.BHZ. 2019-04-23T14:29:51.22 10.0 negative automatic P 257 60.7446 1.45469 0
IU.CASY.BHZ.00 2019-04-23T14:29:43.07 10.0 negative automatic P 206 59.9533 -1.38921 0.423118
GE.MMRI.BHZ. 2019-04-23T14:29:32.72 10.0 positive automatic P 275 58.216 0.00304341 0.418402
GE.TNTI.BHZ. 2019-04-23T14:29:30.27 10.0 negative automatic P 288 57.8569 0.0305465 0.443645
GE.SANI.BHZ. 2019-04-23T14:29:28.92 10.0 positive automatic P 284 57.7023 -0.256406 0.445946
AU.MORW.BHZ. 2019-04-23T14:29:27.75 10.0 positive automatic P 250 57.5912 -0.712321 0.452994
GE.SOEI.BHZ. 2019-04-23T14:29:18.87 10.0 negative automatic P 275 55.9333 1.78199 0.472686
IU.MBWA.BHZ.00 2019-04-23T14:29:18.62 10.0 positive automatic P 260 56.2566 -0.575431 0.479148
IU.NWAO.BHZ.00 2019-04-23T14:29:15.47 10.0 positive automatic P 246 55.874 -1.08796 0.485147
GT.VNDA.BHZ.00 2019-04-23T14:29:02.10 10.0 positive automatic P 185 53.8355 0.00700451 0.499461
IU.SBA.BHZ.00 2019-04-23T14:29:02.97 10.0 positive automatic P 184 53.8068 1.09343 0.499911
GE.BNDI.BHZ. 2019-04-23T14:28:56.87 10.0 positive automatic P 283 53.0917 0.12722 0.517273
IU.GUMO.BHZ.00 2019-04-23T14:28:48.72 10.0 negative automatic P 313 51.9912 -0.0855814 0.528784
AU.FITZ.BHZ. 2019-04-23T14:28:47.63 10.0 negative automatic P 266 51.796 0.251551 0.508029
AU.MTN.BHZ. 2019-04-23T14:28:22.62 10.0 positive automatic P 274 48.5341 -0.612203 0.553447
AU.WRKA.BHZ. 2019-04-23T14:28:16.15 10.0 negative automatic P 258 47.6889 -0.795333 0.600436
AU.FORT.BHZ. 2019-04-23T14:28:10.57 10.0 negative automatic P 250 47.0411 -1.36706 0.633995
GE.GENI.BHZ. 2019-04-23T14:27:57.87 10.0 negative automatic P 292 45.1665 0.366045 0.652235
NZ.KHZ.HHZ.10 2019-04-23T14:27:18.38 10.0 negative automatic S 197 19.0196 -7.77981 0
G.TAOE.BHZ.00 2019-04-23T14:27:17.74 10.0 positive automatic P 74 40.0269 0.870064 0.720661
AU.MANU.BHZ.00 2019-04-23T14:27:13.48 10.0 negative automatic P 299 39.5835 0.317481 0.775151
AU.HTT.BHZ. 2019-04-23T14:26:57.57 10.0 positive automatic P 246 37.7613 -0.75049 0.811795
AU.COEN.BHZ. 2019-04-23T14:26:55.17 10.0 positive automatic P 279 37.24 1.23718 0.802854
IU.SNZO.BHZ.00 2019-04-23T14:26:51.40 10.0 negative automatic S 196 17.6768 -12.1522 0
IU.PMG.BHZ.00 2019-04-23T14:26:41.82 10.0 negative automatic P 289 35.6966 0.797141 0.814603
AU.RABL.BHZ.00 2019-04-23T14:26:29.55 10.0 negative automatic P 301 34.4885 -1.32428 0.890598
AU.QLP.BHZ. 2019-04-23T14:26:20.72 10.0 negative automatic P 258 33.274 0.18548 0.44204
II.TAU.BHZ.00 2019-04-23T14:26:19.67 10.0 positive automatic P 228 33.3088 -1.14724 0.88335
AU.TOO.BHZ.00 2019-04-23T14:26:17.63 10.0 positive automatic P 238 33.0045 -0.671913 0.889741
AU.MILA.BHZ.00 2019-04-23T14:25:52.70 10.0 negative automatic P 238 30.0532 -0.122924 0.963855
G.CAN.BHZ.00 2019-04-23T14:25:50.05 10.0 positive automatic P 241 29.756 -0.163157 0.97561
G.PPTF.BHZ.00 2019-04-23T14:25:36.80 10.0 negative automatic P 82 28.1138 0.997654 0.930233
AU.RIV.BHZ. 2019-04-23T14:25:32.80 10.0 negative automatic P 243 27.7024 0.732196 0.952381
AU.EIDS.BHZ. 2019-04-23T14:25:28.75 10.0 negative automatic P 262 27.236 0.767652 0.952381
AU.ARMA.BHZ. 2019-04-23T14:25:25.07 10.0 negative automatic P 251 26.7923 0.857525 0.952381
IU.AFI.BHZ.00 2019-04-23T14:25:11.17 10.0 negative automatic S 34 12.4812 -8.05819 0
IU.HNR.BHZ.00 2019-04-23T14:25:09.37 10.0 negative automatic P 303 25.183 -0.38907 0.879121
NZ.ODZ.HHZ.10 2019-04-23T14:24:38.46 10.0 negative automatic P 200 22.2691 -6.04215 0
AU.LHI.BHZ.00 2019-04-23T14:24:30.53 10.0 negative automatic P 245 20.7016 1.20585 0.909091
AU.NIUE.BHZ. 2019-04-23T14:24:23.25 10.0 positive automatic S 59 9.8721 -2.51944 0
NZ.KHZ.HHZ.10 2019-04-23T14:24:06.16 10.0 positive automatic P 197 19.0196 -8.31531 0
IU.RAR.BHZ.00 2019-04-23T14:24:01.15 10.0 positive automatic P 83 17.8528 -0.154745 0.952381
IU.SNZO.BHZ.00 2019-04-23T14:23:51.97 10.0 positive automatic P 196 17.6768 -8.40601 0
ND.KOUNC.BHZ.00 2019-04-23T14:23:44.65 10.0 negative automatic P 281 16.0615 1.49307 0
G.DZM.BHZ.00 2019-04-23T14:23:20.00 10.0 negative automatic P 277 13.7236 2.18058 0
ND.ONTNC.BHZ.00 2019-04-23T14:23:19.09 10.0 negative automatic P 276 13.6636 1.93201 0
NZ.URZ.HHZ.10 2019-04-23T14:23:14.74 10.0 positive automatic P 193 14.2144 -8.43472 0
AU.NFK.BHZ.00 2019-04-23T14:23:07.76 10.0 negative automatic P 246 12.6515 1.68634 0
ND.MARNC.BHZ.00 2019-04-23T14:23:05.29 10.0 negative automatic P 281 12.4468 1.47339 0
NZ.OUZ.HHZ.10 2019-04-23T14:23:03.42 10.0 negative automatic P 210 12.5859 -1.93288 0
IU.AFI.BHZ.00 2019-04-23T14:23:00.60 10.0 positive automatic P 34 12.4812 -2.78236 0.963855
AU.NIUE.BHZ. 2019-04-23T14:22:32.87 10.0 positive automatic P 59 9.8721 -1.51707 0.941176
II.MSVF.BHZ.00 2019-04-23T14:22:07.57 10.0 negative automatic P 336 7.3215 2.26694 0.909091
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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