M5.1 earthquake 137 km S of ‘Ohonua, Tonga
A magnitude 5.1 earthquake struck 137 km S of ‘Ohonua, Tonga on Sat, Apr 9, 1983, 5:11 PM GMT+13 (04:11 UTC), 23 km (14 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.1 (mw), moderate
- Local time
- UTC
- 1983-04-09 04:11:20 UTC
- Depth
- 22.6 km (14.0 mi), shallow
- Epicenter
- 22.579° S, 174.992° 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.
- Magnitude uncertainty
- ±0.22
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.1 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.8188 km S of ‘Ohonua, Tonga · 15870 days ago · 67 km deep · 51 km away
- 4.489 km SSW of ‘Ohonua, Tonga · 15857 days ago · 33 km deep · 54 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem578392. Read Wed, Sep 23, 2026, 1:20 PM UTC.