Earthquake with magnitude of Mwp 5.9 on date 24-12-2023 and time 00:44:50 (Italy) in region Tonga Islands [Sea: Tonga]

A magnitude Mwp 5.9 earthquake occured in region: Tonga Islands [Sea: Tonga], on

  • 23-12-2023 23:44:50 (UTC)
  • 24-12-2023 00:44:50 (UTC +01:00) Italian time
  • 24-12-2023 12:44:50 (UTC +13:00) local time in the region of the earthquake (Pacific/Tongatapu)

and geographic coordinates (lat, lon) -20.0390, -173.8090 at 11 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 5.3
Mwp 5.9

Mwpd 5.9
2023-12-23
23:44:50
-20.0391 -173.809 11 2023-12-24
00:05:39
Sala Sismica INGV-Roma 124229811
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-12-23 23:44:50
Latitude -20.0391
Longitude -173.8090
Depth (km) 11 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 124229811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 26221
Semi-minor axis of confidence ellipse (meter) 14517
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 326
Circular confidence region, given by single value of horizontal uncertainty (meter) 21160.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82.4882
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) 2.54386
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:5.9

Field Value
Value 5.9
Uncertainty 0.1
Num. used stations 13
Type of magnitude Mwp
Reference to an origin 124229811
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2023-12-24 00:05:39

Mwpd:5.9

Field Value
Value 5.9
Uncertainty 0.1
Num. used stations 12
Type of magnitude Mwpd
Reference to an origin 124229811
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2023-12-24 00:05:39

mb:5.3

Field Value
Value 5.3
Uncertainty 0.1
Num. used stations 49
Type of magnitude mb
Reference to an origin 124229811
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2023-12-24 00:05:39
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