M4.9 earthquake 124 km ESE of ‘Ohonua, Tonga
A magnitude 4.9 earthquake struck 124 km ESE of ‘Ohonua, Tonga on Thu, Dec 15, 1977, 9:35 PM GMT+13 (08:35 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
- 4.9 (mb), light
- Local time
- UTC
- 1977-12-15 08:35:57 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 21.693° S, 173.813° 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
- Stations used
- 10
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 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 usp0000s2x. Read Tue, Sep 22, 2026, 5:21 PM UTC.