M4.7 earthquake 243 km S of ‘Ohonua, Tonga

A magnitude 4.7 earthquake struck 243 km S of ‘Ohonua, Tonga on Tue, Jun 28, 1977, 6:43 PM GMT+13 (05:43 UTC), 47 km (29 mi) below the surface.

A larger quake followed: M4.8 244 km S of ‘Ohonua, Tonga. This one was a foreshock.

Map

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

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.7 and up: 12 in the 60 days after this one and 4 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event usp0000ph2. Read Tue, Sep 22, 2026, 9:56 AM UTC.