Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Mwp 6.0 on date 27-01-2022 and time 06:40:08 (UTC) in region Tonga [Sea]

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

  • 27-01-2022 06:40:08 (UTC)
  • 27-01-2022 07:40:08 (UTC +01:00) Italian time
  • 27-01-2022 19:40:08 (UTC +13:00) local time in the region of the earthquake (Pacific/Tongatapu)

and geographic coordinates (lat, lon) -19.0060, -176.3090 at 13 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.

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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
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 		2022-01-27
06:40:08		 -19.0055 -176.309 13 2022-01-27
07:04:26		 Sala Sismica INGV-Roma 100222271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-01-27 06:40:08
Latitude -19.0055
Longitude -176.3090
Depth (km) 13 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 100222271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 31313
Semi-minor axis of confidence ellipse (meter) 16298
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 356
Circular confidence region, given by single value of horizontal uncertainty (meter) 25279.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87.9283
Number of associated phases, regardless of their use for origin computation 42
Number of defining phases 42
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 2.21235
Epicentral distance of station closest to the epicenter (degree) 5.49702
Epicentral distance of station farthest from the epicenter (degree) 95.90267
Number of stations at which the event was observed 42
Number of stations from which data was used for origin computation 42
Magnitudes information

Mwpd:6.2

Field Value
Value 6.2
Uncertainty 0.1
Num. used stations 11
Type of magnitude Mwpd
Reference to an origin 100222271
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2022-01-27 07:04:26

Mwp:6.0

Field Value
Value 6.0
Uncertainty 0.1
Num. used stations 13
Type of magnitude Mwp
Reference to an origin 100222271
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2022-01-27 07:04:26

mb:5.3

Field Value
Value 5.3
Uncertainty 0.1
Num. used stations 33
Type of magnitude mb
Reference to an origin 100222271
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2022-01-27 07:04:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
US.ECSD.BHZ.00 2022-01-27T06:53:38.23 10.0 positive automatic P 46 95.9027 4.80012 0.0573713
C1.CO02.BHZ. 2022-01-27T06:53:26.38 10.0 positive automatic P 124 92.5631 8.15646 0.0755918
US.DGMT.BHZ.00 2022-01-27T06:53:21.18 10.0 negative automatic P 39 92.9337 1.33531 0.0685775
C.GO05.BHZ. 2022-01-27T06:53:13.90 10.0 negative automatic P 127 90.3092 6.31675 0.0878282
GE.SNAA.BHZ. 2022-01-27T06:53:03.26 10.0 negative automatic P 178 89.2094 0.688136 0.0950755
C1.LL02.BHZ. 2022-01-27T06:52:59.03 10.0 negative automatic P 135 87.0868 6.6316 0.105098
US.MSO.BHZ.00 2022-01-27T06:52:53.95 10.0 negative automatic P 37 86.4124 4.69754 0.117471
G.COYC.BHZ.00 2022-01-27T06:52:49.30 10.0 negative automatic P 137 85.9875 2.3239 0.112831
AT.SKAG.BHZ. 2022-01-27T06:52:49.00 10.0 negative automatic P 20 85.2799 5.55291 0.122205
IU.COLA.BHZ.00 2022-01-27T06:52:48.37 10.0 negative automatic PcP 12 86.6624 -1.92445 0.115589
US.NEW.BHZ.00 2022-01-27T06:52:44.93 10.0 positive automatic P 35 85.4419 0.566786 0.126387
US.DUG.BHZ.00 2022-01-27T06:52:41.18 10.0 positive automatic sP 43 83.5584 6.22473 0.133802
US.HLID.BHZ.00 2022-01-27T06:52:39.53 10.0 positive automatic PcP 40 84.3533 0.461683 0.123493
US.BMO.BHZ.00 2022-01-27T06:52:33.13 10.0 positive automatic PcP 38 83.3632 -0.770668 0.14855
US.HAWA.BHZ.00 2022-01-27T06:52:32.33 10.0 positive automatic PcP 36 83.0176 0.352685 0.135097
US.ELK.BHZ.00 2022-01-27T06:52:28.88 10.0 positive automatic PcP 42 82.2977 0.328323 0.140796
US.TPNV.BHZ.00 2022-01-27T06:52:14.83 10.0 negative automatic pP 45 79.5466 1.06726 0.173065
II.PFO.BHZ.00 2022-01-27T06:52:04.42 10.0 positive automatic pP 48 77.5700 1.62018 0.196066
MY.SBM.BHZ. 2022-01-27T06:51:39.02 10.0 positive automatic P 279 73.3693 0.513942 0
IU.QSPA.BHZ.00 2022-01-27T06:51:23.12 10.0 positive automatic P 180 70.9364 -1.28019 0.276367
MY.LDM.BHZ. 2022-01-27T06:51:11.92 10.0 negative automatic pP 284 68.5477 2.69699 0.272245
AU.MORW.BHZ. 2022-01-27T06:50:25.02 10.0 negative automatic P 247 61.8036 -0.451894 0.385981
GT.VNDA.BHZ.00 2022-01-27T06:50:12.25 10.0 positive automatic P 185 59.4895 2.58464 0.404279
GE.SOEI.BHZ. 2022-01-27T06:50:00.12 10.0 positive automatic P 270 58.0477 0.324418 0.28417
AU.FITZ.BHZ. 2022-01-27T06:49:37.38 10.0 positive automatic P 261 54.7773 1.05042 0.478115
GE.FAKI.BHZ. 2022-01-27T06:49:20.32 10.0 positive automatic P 281 52.7586 -1.23094 0.240698
AU.FORT.BHZ.00 2022-01-27T06:49:09.53 10.0 positive automatic P 245 51.3009 -1.17372 0.558558
AU.WRKA.BHZ.00 2022-01-27T06:49:09.43 10.0 negative automatic P 253 51.3655 -1.83749 0.513622
AU.MTN.BHZ.00 2022-01-27T06:49:04.20 10.0 positive automatic P 269 50.7396 -2.26958 0
II.WRAB.BHZ.00 2022-01-27T06:48:30.55 10.0 positive automatic P 260 46.3465 -2.13894 0.290733
AU.HTT.BHZ. 2022-01-27T06:48:00.41 10.0 negative automatic P 241 42.3006 -0.764761 0.687227
AU.TOO.BHZ.00 2022-01-27T06:47:24.35 10.0 positive automatic P 233 38.0481 -0.725321 0.767144
AU.QLP.BHZ. 2022-01-27T06:47:14.82 10.0 positive automatic P 251 37.0041 -1.34625 0.691017
IU.CTAO.BHZ.00 2022-01-27T06:46:59.32 10.0 positive automatic P 262 35.2207 -1.60854 0.873496
G.CAN.BHZ.00 2022-01-27T06:46:56.10 10.0 negative automatic P 235 34.6558 -0.0159002 0.834047
NZ.OUZ.HHZ.10 2022-01-27T06:44:23.22 10.0 positive automatic P 207 18.5113 0.348061 0.97561
ND.KOUNC.BHZ.00 2022-01-27T06:44:21.00 10.0 positive automatic P 262 18.3142 0.3582 0.43956
ND.ONTNC.BHZ.00 2022-01-27T06:43:58.20 10.0 positive automatic P 255 16.4525 0.747107 0.43956
G.DZM.BHZ.00 2022-01-27T06:43:57.98 10.0 positive automatic P 256 16.4289 0.694312 0.925926
G.SANVU.BHZ.00 2022-01-27T06:43:54.75 10.0 positive automatic P 280 16.1370 1.34237 0.43956
IU.RAR.BHZ.00 2022-01-27T06:43:44.37 10.0 positive automatic P 101 15.6750 -3.06165 0.909091
II.MSVF.BHZ.00 2022-01-27T06:41:28.17 10.0 positive automatic P 282 5.4970 -0.424182 0.43956
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