Earthquake with magnitude of Mwp 6.8 on date 04-12-2022 and time 19:24:13 (UTC) in region Tonga Islands [Sea: Tonga]

A magnitude Mwp 6.8 earthquake occured in region: Tonga Islands [Sea: Tonga], on

  • 04-12-2022 19:24:13 (UTC)
  • 04-12-2022 20:24:13 (UTC +01:00) Italian time
  • 05-12-2022 08:24:13 (UTC +13:00) local time in the region of the earthquake (Pacific/Apia)

and geographic coordinates (lat, lon) -15.3840, -173.0570 at 16 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
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
mb 5.7
Mwp 6.8

Mwpd 6.9
2022-12-04
19:24:13
-15.3844 -173.057 16 2022-12-04
19:47:40
Sala Sismica INGV-Roma 112498781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-12-04 19:24:13
Latitude -15.3844
Longitude -173.0570
Depth (km) 16 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 112498781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 22426
Semi-minor axis of confidence ellipse (meter) 10206
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 141
Circular confidence region, given by single value of horizontal uncertainty (meter) 20192.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 20.84
Number of associated phases, regardless of their use for origin computation 1
Number of defining phases 1
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.65393
Epicentral distance of station closest to the epicenter (degree)
Epicentral distance of station farthest from the epicenter (degree)
Number of stations at which the event was observed 0
Number of stations from which data was used for origin computation 0
Magnitudes information

Mwp:6.8

Field Value
Value 6.8
Uncertainty 0.1
Num. used stations 107
Type of magnitude Mwp
Reference to an origin 112498781
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2022-12-04 19:47:40

Mwpd:6.9

Field Value
Value 6.9
Uncertainty 0.1
Num. used stations 105
Type of magnitude Mwpd
Reference to an origin 112498781
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2022-12-04 19:47:40

mb:5.7

Field Value
Value 5.7
Uncertainty 0.1
Num. used stations 137
Type of magnitude mb
Reference to an origin 112498781
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2022-12-04 19:47:40
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