M5.1 earthquake 120 km NNE of Hihifo, Tonga
A magnitude 5.1 earthquake struck 120 km NNE of Hihifo, Tonga on Wed, Mar 23, 1977, 7:57 AM GMT-11 (18:57 UTC), 33 km (21 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
- 1977-03-23 18:57:36 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 15.009° S, 173.248° 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.
- Stations used
- 33
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 3 in the 30 days before it.
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000n33. Read Tue, Sep 22, 2026, 8:46 AM UTC.