M6.7 earthquake 41 km SW of Vaini, Tonga
A magnitude 6.7 earthquake struck 41 km SW of Vaini, Tonga on Mon, Mar 21, 1983, 8:44 PM GMT+13 (07:44 UTC), 68 km (42 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.7 (mw), strong
- Local time
- UTC
- 1983-03-21 07:44:17 UTC
- Depth
- 68.0 km (42.3 mi), shallow
- Epicenter
- 21.466° S, 175.451° W
- Region
- Tonga
- Strongest shaking
- VI, strong shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- VI, strong shaking
- Map
- Automatic
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
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.535 km SSW of Vaini, Tonga · 15891 days ago · 63 km deep · 21 km away
- 5.234 km SW of Vaini, Tonga · 15868 days ago · 33 km deep · 7 km away
- 4.734 km W of Haveluloto, Tonga · 15858 days ago · 51 km deep · 33 km away
- 4.489 km SSW of ‘Ohonua, Tonga · 15857 days ago · 33 km deep · 79 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001tte (also filed as gcmtc032183b, gcmt19830321074417, atlas19830321074417, iscgem581083). Read Wed, Sep 23, 2026, 2:36 AM UTC.