M5.1 earthquake 139 km W of Pangai, Tonga
A magnitude 5.1 earthquake struck 139 km W of Pangai, Tonga on Wed, Sep 30, 1981, 12:02 PM GMT+13 (23:02 UTC), 226 km (140 mi) below the surface.
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
- 1981-09-29 23:02:15 UTC
- Depth
- 226.0 km (140.4 mi), intermediate-depth
- Epicenter
- 19.656° S, 175.676° 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 2.1 and up: 0 in the 60 days after this one and 1 in the 30 days before it.
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001g62. Read Mon, Sep 28, 2026, 5:12 AM UTC.