M5.5 earthquake 133 km S of ‘Ohonua, Tonga
A magnitude 5.5 earthquake struck 133 km S of ‘Ohonua, Tonga on Fri, Apr 8, 1983, 4:38 AM GMT+13 (15:38 UTC), 33 km (21 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
- 1983-04-07 15:38:36 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 22.532° S, 175.115° 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 2.5 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.1137 km S of ‘Ohonua, Tonga · 15873 days ago · 23 km deep · 14 km away
- 4.8188 km S of ‘Ohonua, Tonga · 15869 days ago · 67 km deep · 57 km away
- 4.489 km SSW of ‘Ohonua, Tonga · 15856 days ago · 33 km deep · 46 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001u8d (also filed as gcmtb040783a, gcmt19830407153835, iscgem578196). Read Tue, Sep 22, 2026, 9:29 PM UTC.