M5.1 earthquake 134 km W of Hihifo, Tonga
A magnitude 5.1 earthquake struck 134 km W of Hihifo, Tonga on Mon, Nov 21, 1983, 1:49 PM GMT-12 (01:49 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.4 68 km WNW of Hihifo, 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, body-wave), moderate
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1983-11-22 01:49:23 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 15.830° S, 175.043° 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 2.1 and up: 1 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 usp0001zzb. Read Thu, Oct 1, 2026, 10:21 PM UTC.