M5.1 earthquake 109 km SSE of Pangai, Tonga
A magnitude 5.1 earthquake struck 109 km SSE of Pangai, Tonga on Thu, Feb 3, 1983, 3:36 AM GMT+13 (14:36 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.8 84 km ESE of ‘Ohonua, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.1 (mb), moderate
- Local time
- UTC
- 1983-02-02 14:36:11 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 20.749° S, 174.019° 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 2.1 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.884 km ESE of ‘Ohonua, Tonga · 15923 days ago · 32 km deep · 95 km away
- 5.246 km ESE of ‘Ohonua, Tonga · 15895 days ago · 33 km deep · 95 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001stc (also filed as iscgem582044). Read Wed, Sep 23, 2026, 3:34 AM UTC.