M5.1 earthquake 60 km NW of Port-Olry, Vanuatu

A magnitude 5.1 earthquake struck 60 km NW of Port-Olry, Vanuatu on Fri, Dec 28, 1973, 11:21 PM GMT+12 (11:21 UTC), 19 km (12 mi) below the surface.

A larger quake followed: M7.5 81 km NW of Port-Olry, Vanuatu. 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 2.1 and up: 77 in the 60 days after this one and 2 in the 30 days before it.

The first 60 of 77.

From the USGS Earthquake Hazards Program and its partner networks, event usp00004p8. Read Tue, Sep 22, 2026, 10:31 PM UTC.