Tonga earthquakes

M5.2 earthquake 204 km S of ‘Ohonua, Tonga

A magnitude 5.2 earthquake struck 204 km S of ‘Ohonua, Tonga on Wed, Jun 29, 1977, 4:11 PM GMT+13 (03:11 UTC), 38 km (24 mi) below the surface.

A larger quake followed: M5.5 125 km S 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: 5.2 (ms), moderate
Local time: Wed, Jun 29, 1977, 4:11 PM GMT+13
UTC: 1977-06-29 03:11:39 UTC
Depth: 38.0 km (23.6 mi), shallow
Epicenter: 23.162° S, 175.199° W
Region: Tonga
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Depth from: CONSTRAINED_BY_DEPTH_PHASES
Stations used: 42

Nearest places

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

Nuku‘alofa, TongaPopulation 22,400. Forecast225 kmS

Nearby

Within 100 km, magnitude 2.2 and up: 12 in the 60 days after this one and 8 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 usp0000phr (also filed as iscgem697874). Read Tue, Sep 22, 2026, 6:59 AM UTC.