M4.7 earthquake 150 km NNW of Neiafu, Tonga
A magnitude 4.7 earthquake struck 150 km NNW of Neiafu, Tonga on Sat, Feb 12, 1983, 10:08 AM GMT-12 (22:08 UTC), 125 km (78 mi) below the surface.
A larger quake followed: M5.8 104 km NNW of Neiafu, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1983-02-12 22:08:28 UTC
- Depth
- 125.0 km (77.7 mi), intermediate-depth
- Epicenter
- 17.393° S, 174.525° 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
Nearby
Within 100 km, magnitude 1.7 and up: 2 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001t03. Read Fri, Oct 2, 2026, 1:18 PM UTC.