Earthquake with magnitude of Mwp 6.0 on date 21-10-2020 and time 00:22:34 (UTC) in region Tonga Islands region [Sea: Tonga]

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

  • 21-10-2020 00:22:34 (UTC)
  • 21-10-2020 02:22:34 (UTC +02:00) Italian time
  • 20-10-2020 13:22:34 (UTC -11:00) local time in the region of the earthquake (Pacific/Niue)

and geographic coordinates (lat, lon) -19.19, -172.46 at 1 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
Reviewed
Rev100
mb 5.4
Mwp 6.0

Mwpd 6.0
2020-10-21
00:22:34
-19.19 -172.46 1 2020-10-21
00:38:54
Sala Sismica INGV-Roma 83970881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-21 00:22:34
Latitude -19.19
Longitude -172.46
Depth (km) 1 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 83970881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 18065
Semi-minor axis of confidence ellipse (meter) 13176
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 150
Circular confidence region, given by single value of horizontal uncertainty (meter) 14591.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 33.4713
Number of associated phases, regardless of their use for origin computation 109
Number of defining phases 109
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.45055
Epicentral distance of station closest to the epicenter (degree) 9.11509
Epicentral distance of station farthest from the epicenter (degree) 93.45318
Number of stations at which the event was observed 95
Number of stations from which data was used for origin computation 95
Magnitudes information

Mwpd:6

Field Value
Value 6
Uncertainty 0.1
Num. used stations 27
Type of magnitude Mwpd
Reference to an origin 83970881
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2020-10-21 00:38:54

Mwp:6

Field Value
Value 6
Uncertainty 0.1
Num. used stations 29
Type of magnitude Mwp
Reference to an origin 83970881
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2020-10-21 00:38:54

mb:5.4

Field Value
Value 5.4
Uncertainty 0.1
Num. used stations 50
Type of magnitude mb
Reference to an origin 83970881
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2020-10-21 00:38:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
US.ECSD.BHZ.00 2020-10-21T00:35:49.48 10.0 positive automatic P 45 93.4532 -0.120947 0
IU.YAK.BHZ.00 2020-10-21T00:35:46.27 10.0 negative automatic P 337 93.1295 -1.76822 0
US.MIAR.BHZ.00 2020-10-21T00:35:43.98 10.0 positive automatic P 54 92.0789 0.768671 0.0823867
IU.TEIG.BHZ.00 2020-10-21T00:35:42.45 10.0 negative automatic P 69 91.3583 2.60439 0.0802711
US.KSU1.BHZ.00 2020-10-21T00:35:41.70 10.0 negative automatic P 49 91.6054 0.67022 0.083449
IU.LCO.BHZ.00 2020-10-21T00:35:39.47 10.0 positive automatic PcP 121 90.505 2.08636 0
US.DGMT.BHZ.00 2020-10-21T00:35:38.08 10.0 positive automatic P 38 90.8053 0.699006 0.0809727
GE.GSI.BHZ. 2020-10-21T00:35:37.47 10.0 negative automatic P 271 90.3941 2.09896 0.0783743
CU.TGUH.BHZ.00 2020-10-21T00:35:36.13 10.0 negative automatic PcP 75 90.1626 0.453475 0
US.NATX.BHZ.00 2020-10-21T00:35:35.88 10.0 negative automatic PcP 56 90.1818 0.288624 0
G.PEL.BHZ.00 2020-10-21T00:35:34.40 10.0 negative automatic P 125 88.9514 5.67857 0.0968174
US.CBKS.BHZ.00 2020-10-21T00:35:30.28 10.0 negative automatic P 48 89.2747 0.0377489 0.0867506
US.OGNE.BHZ.00 2020-10-21T00:35:29.33 10.0 positive automatic PcP 45 88.6419 0.392195 0
GE.SNAA.BHZ. 2020-10-21T00:35:28.91 10.0 negative automatic P 177 88.8585 0.601167 0.0997144
US.LAO.BHZ.00 2020-10-21T00:35:28.20 10.0 negative automatic P 39 88.7391 0.441392 0.0960785
IU.BILL.BHZ.00 2020-10-21T00:35:25.97 10.0 positive automatic P 352 88.6046 -1.05651 0.0948708
US.WMOK.BHZ.00 2020-10-21T00:35:25.33 10.0 negative automatic P 52 88.2279 0.0506501 0.0995234
GT.PLCA.BHZ.00 2020-10-21T00:35:17.98 10.0 negative automatic P 132 86.1645 2.60044 0.123665
US.AMTX.BHZ.00 2020-10-21T00:35:16.05 10.0 negative automatic P 51 86.1475 0.76727 0.122325
US.RLMT.BHZ.00 2020-10-21T00:35:15.40 10.0 negative automatic P 39 86.1159 0.0895326 0.111913
IU.COLA.BHZ.00 2020-10-21T00:35:13.72 10.0 negative automatic P 10 86.1505 -1.43841 0.120863
US.ISCO.BHZ.00 2020-10-21T00:35:13.53 10.0 negative automatic P 45 85.6975 0.172955 0.112472
C1.LL02.BHZ. 2020-10-21T00:35:08.95 10.0 negative automatic P 134 84.3613 2.71234 0.131946
US.BOZ.BHZ.00 2020-10-21T00:35:09.45 10.0 negative automatic P 38 84.9878 -0.162633 0.127005
US.SDCO.BHZ.00 2020-10-21T00:35:09.25 10.0 negative automatic P 47 84.7674 0.579464 0.13333
US.BW06.BHZ.00 2020-10-21T00:35:07.78 10.0 positive automatic P 41 84.6779 -0.386715 0.135675
AT.SKAG.BHZ. 2020-10-21T00:35:05.86 10.0 negative automatic P 18 84.2831 0.0614897 0.127583
G.COYC.BHZ.00 2020-10-21T00:35:04.00 10.0 negative automatic P 136 83.3548 2.9326 0.132468
US.AHID.BHZ.00 2020-10-21T00:35:03.23 10.0 negative automatic P 40 83.7272 -0.0529863 0.133963
US.NEW.BHZ.00 2020-10-21T00:35:01.05 10.0 negative automatic P 33 83.5459 -1.09146 0.133901
C1.MG02.BHZ. 2020-10-21T00:35:00.45 10.0 positive automatic P 144 82.4709 3.09589 0.152692
IU.ANMO.BHZ.00 2020-10-21T00:34:59.07 10.0 negative automatic P 49 82.7222 1.0088 0.150509
US.HWUT.BHZ.00 2020-10-21T00:34:58.25 10.0 negative automatic P 41 82.7991 -0.212418 0.144678
US.WRAK.BHZ.00 2020-10-21T00:34:57.65 10.0 negative automatic P 21 82.775 -0.385289 0.135532
US.MVCO.BHZ.00 2020-10-21T00:34:57.33 10.0 negative automatic P 46 82.4408 0.667038 0.152954
US.HLID.BHZ.00 2020-10-21T00:34:55.53 10.0 negative automatic P 38 82.1961 0.218065 0.151489
US.MNTX.BHZ.00 2020-10-21T00:34:54.70 10.0 negative automatic P 52 81.9306 1.02534 0.148593
C.GO10.BHZ. 2020-10-21T00:34:54.18 10.0 positive automatic P 144 81.3107 3.73383 0.153817
US.BMO.BHZ.00 2020-10-21T00:34:50.03 10.0 negative automatic P 36 81.3243 -0.57479 0.148689
US.DUG.BHZ.00 2020-10-21T00:34:50.10 10.0 negative automatic P 42 81.2265 -0.037324 0.152816
US.HAWA.BHZ.00 2020-10-21T00:34:49.00 10.0 negative automatic P 34 81.0956 -0.251787 0.164915
US.ELK.BHZ.00 2020-10-21T00:34:43.85 10.0 negative automatic P 40 80.04 -0.0498833 0.168595
US.WUAZ.BHZ.00 2020-10-21T00:34:42.15 10.0 negative automatic P 46 79.5817 0.841329 0.166987
US.NLWA.BHZ.00 2020-10-21T00:34:40.95 10.0 negative automatic P 31 79.567 -0.115189 0.163483
US.WVOR.BHZ.00 2020-10-21T00:34:38.35 10.0 negative automatic P 37 79.0602 -0.0660649 0.173539
IU.TUC.BHZ.00 2020-10-21T00:34:35.17 10.0 negative automatic P 49 78.2787 1.1285 0.18482
II.KDAK.BHZ.00 2020-10-21T00:34:35.27 10.0 negative automatic P 11 78.7251 -1.1073 0.182738
NN.PRN.HHZ. 2020-10-21T00:34:34.48 10.0 positive automatic P 43 78.1978 0.795935 0.185157
US.TPNV.BHZ.00 2020-10-21T00:34:28.10 10.0 negative automatic P 43 77.1564 0.204866 0.186951
JP.JKA.BHZ. 2020-10-21T00:34:18.30 10.0 negative automatic PcP 326 73.2947 -3.52823 0
BK.CMB.BHZ.00 2020-10-21T00:34:16.82 10.0 positive automatic P 40 75.2378 -0.00953517 0.212148
MY.KKM.BHZ. 2020-10-21T00:34:13.57 10.0 negative automatic P 282 74.5665 0.596904 0.224031
MX.SRIG.BHZ. 2020-10-21T00:34:13.60 10.0 negative automatic P 53 74.5724 0.728656 0.209362
BK.SAO.BHZ.00 2020-10-21T00:34:08.62 10.0 negative automatic P 40 73.7765 0.348089 0.219583
JP.JTM.BHZ. 2020-10-21T00:34:08.60 10.0 positive automatic P 325 73.8745 -0.209321 0.236817
JP.JMN.BHZ. 2020-10-21T00:34:07.70 10.0 negative automatic P 316 73.5667 0.627199 0.229255
JP.JGF.BHZ. 2020-10-21T00:34:00.45 10.0 negative automatic P 319 72.5213 -0.440271 0.240293
IU.MAJO.BHZ.00 2020-10-21T00:34:00.82 10.0 negative automatic P 320 72.6189 -0.619612 0.228848
GE.JAGI.BHZ. 2020-10-21T00:33:54.82 10.0 negative automatic P 267 71.6105 -0.538465 0.262032
IU.ADK.BHZ.00 2020-10-21T00:33:50.62 10.0 positive automatic P 357 71.1635 -2.029 0.255018
IU.CASY.BHZ.00 2020-10-21T00:33:29.37 10.0 negative automatic P 205 67.2712 0.874871 0.137342
AU.MORW.BHZ. 2020-10-21T00:33:14.67 10.0 negative automatic P 246 65.0631 0.311061 0.350473
IU.NWAO.BHZ.00 2020-10-21T00:33:04.57 10.0 negative automatic P 242 63.5209 0.309206 0.350047
IU.MBWA.BHZ.00 2020-10-21T00:33:01.70 10.0 negative automatic P 255 63.1728 -0.226296 0.376195
GE.SANI.BHZ. 2020-10-21T00:32:57.27 10.0 negative automatic P 278 62.5251 -0.31199 0.376046
GE.SOEI.BHZ. 2020-10-21T00:32:53.62 10.0 negative automatic P 269 61.6863 1.49424 0.378595
GT.VNDA.BHZ.00 2020-10-21T00:32:39.95 10.0 positive automatic P 186 59.6752 1.70151 0.421054
IU.SBA.BHZ.00 2020-10-21T00:32:36.92 10.0 negative automatic P 185 59.5224 -0.262016 0.428445
AU.FITZ.BHZ. 2020-10-21T00:32:28.70 10.0 negative automatic P 260 58.3366 -0.254459 0.406489
IU.SNZO.BHZ.00 2020-10-21T00:32:19.75 10.0 negative automatic S 204 24.6784 3.77106 0
GE.FAKI.BHZ. 2020-10-21T00:32:14.32 10.0 negative automatic P 280 56.3715 -0.768331 0.4438
AU.HTT.BHZ. 2020-10-21T00:30:51.80 10.0 negative automatic P 242 45.403 -0.76211 0.646737
IU.WAKE.BHZ.00 2020-10-21T00:30:37.25 10.0 negative automatic P 331 43.5866 -0.671471 0.620626
II.TAU.BHZ.00 2020-10-21T00:30:19.42 10.0 negative automatic P 226 41.2393 0.60305 0.723588
AU.TOO.BHZ.00 2020-10-21T00:30:15.45 10.0 positive automatic P 234 40.8647 -0.365616 0.739518
IU.PMG.BHZ.00 2020-10-21T00:30:10.07 10.0 negative automatic P 278 40.2295 -0.403218 0.693351
AU.QLP.BHZ. 2020-10-21T00:30:10.42 10.0 negative automatic P 251 40.3861 -1.37325 0.731164
IU.CTAO.BHZ.00 2020-10-21T00:29:56.87 10.0 positive automatic P 262 38.7958 -1.68852 0.779983
G.CAN.BHZ.00 2020-10-21T00:29:47.80 10.0 negative automatic P 237 37.5586 -0.390961 0.776625
AU.ARMA.BHZ. 2020-10-21T00:29:19.70 10.0 negative automatic P 244 34.3058 -0.680339 0.831441
AU.EIDS.BHZ. 2020-10-21T00:29:17.52 10.0 negative automatic P 253 34.1919 -1.71923 0.824244
NZ.ODZ.HHZ.10 2020-10-21T00:28:37.45 10.0 positive automatic P 205 29.4142 0.183343 0.943396
AU.LHI.BHZ.00 2020-10-21T00:28:28.60 10.0 positive automatic P 239 28.4185 0.220955 0.941176
NZ.KHZ.HHZ.10 2020-10-21T00:28:07.81 10.0 positive automatic P 204 26.0737 0.493083 0.980392
IU.XMAS.BHZ.00 2020-10-21T00:28:07.40 10.0 negative automatic P 36 25.853 2.08773 0.869565
IU.SNZO.BHZ.00 2020-10-21T00:27:55.05 10.0 positive automatic P 204 24.6784 0.389275 0.909091
ND.KOUNC.BHZ.00 2020-10-21T00:27:27.65 10.0 positive automatic P 262 21.8958 0.899232 0.869565
NZ.URZ.HHZ.10 2020-10-21T00:27:18.13 10.0 positive automatic P 203 21.1163 -0.235308 0.990099
AU.NFK.BHZ.00 2020-10-21T00:27:12.42 10.0 positive automatic P 237 20.3829 1.98021 0.970874
IU.RAO.BHZ.00 2020-10-21T00:27:09.75 10.0 negative automatic S 205 11.2218 -8.92619 0
NZ.OUZ.HHZ.10 2020-10-21T00:27:09.76 10.0 positive automatic P 215 20.222 1.08868 0.921659
ND.ONTNC.BHZ.00 2020-10-21T00:27:05.09 10.0 negative automatic P 257 19.9484 -0.603312 0.930233
G.SANVU.BHZ.00 2020-10-21T00:27:01.90 10.0 positive automatic P 278 19.7609 -1.74116 0.909091
ND.MARNC.BHZ.00 2020-10-21T00:26:47.55 10.0 positive automatic P 260 18.4266 -1.40576 0.97561
IU.RAR.BHZ.00 2020-10-21T00:25:21.77 10.0 positive automatic P 102 12.0699 -3.62068 0.930233
IU.RAO.BHZ.00 2020-10-21T00:25:12.75 10.0 negative automatic P 205 11.2218 -1.0516 0.97561
II.MSVF.BHZ.00 2020-10-21T00:24:48.27 10.0 positive automatic P 278 9.1151 3.20771 0.888889
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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