Tonga earthquakes

M5.1 earthquake 108 km ENE of ‘Ohonua, Tonga

A magnitude 5.1 earthquake struck 108 km ENE of ‘Ohonua, Tonga on Sun, Jun 23, 2019, 1:21 PM GMT+13 (00:21 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.3 121 km ENE of ‘Ohonua, Tonga. This one was a foreshock.

Nuku‘alofa forecast More in Tonga

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 5.1 (Mww, W-phase moment), moderate
Magnitude from: USGS National Earthquake Information Center
Local time: Sun, Jun 23, 2019, 1:21 PM GMT+13
UTC: 2019-06-23 00:21:06 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 21.112° S, 173.935° W
Region: Tonga
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
5.1	Mww, W-phase moment	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.093 · 11 stations
5.0	Mw, moment	ISC-GEM global catalog	Final · ±0.1

Did you feel it?

No one has reported feeling this quake to the USGS.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Oblique reverse
Moment magnitude: 5.1 Mww
Nodal plane 1: Strike 350°, dip 26°, rake 45°
Nodal plane 2: Strike 218°, dip 72°, rake 109°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 11.8 km horizontally, 1.8 km in depth
Magnitude uncertainty: ±0.09
Depth from: Operator assigned
Station coverage gap: 100°
Stations used: 108

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nuku‘alofa, TongaPopulation 22,400. Forecast131 kmE

Nearby

Within 100 km, magnitude 2.1 and up: 12 in the 60 days after this one and 17 in the 30 days before it.

After

Before

Earthquakes today Tonga earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us600044qw (also filed as iscgem615967996). Read Fri, Oct 2, 2026, 4:52 PM UTC.