M5.5 earthquake 35 km SSW of Vaini, Tonga
A magnitude 5.5 earthquake struck 35 km SSW of Vaini, Tonga on Tue, Mar 22, 1983, 4:49 AM GMT+13 (15:49 UTC), 63 km (39 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.5 (mb), moderate
- Local time
- UTC
- 1983-03-21 15:49:52 UTC
- Depth
- 63.0 km (39.1 mi), shallow
- Epicenter
- 21.508° S, 175.253° 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
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 3 in the 60 days after this one and 2 in the 30 days before it.
After
- 5.234 km SW of Vaini, Tonga · 15868 days ago · 33 km deep · 19 km away
- 4.734 km W of Haveluloto, Tonga · 15858 days ago · 51 km deep · 47 km away
- 4.489 km SSW of ‘Ohonua, Tonga · 15857 days ago · 33 km deep · 69 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001ttm (also filed as iscgemsup581105). Read Wed, Sep 23, 2026, 5:04 AM UTC.