M5.0 earthquake 41 km SW of Vaini, Tonga
A magnitude 5.0 earthquake struck 41 km SW of Vaini, Tonga on Thu, Dec 15, 1983, 9:39 PM GMT+13 (08:39 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.6 77 km WNW of Haveluloto, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.0 (mb), moderate
- Local time
- UTC
- 1983-12-15 08:39:39 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 21.443° S, 175.480° 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
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.0 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00020gm. Read Tue, Sep 22, 2026, 9:28 PM UTC.