M4.7 earthquake 41 km NW of Hihifo, Tonga
A magnitude 4.7 earthquake struck 41 km NW of Hihifo, Tonga on Sat, Dec 27, 1975, 4:15 AM GMT-11 (15:15 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.7 86 km NNE 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
- 4.7 (mb), light
- Local time
- UTC
- 1975-12-27 15:15:41 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 15.704° S, 174.088° 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
- 7
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 2 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.424 km ENE of Hihifo, Tonga · 18531 days ago · 33 km deep · 57 km away
- 5.786 km NNE of Hihifo, Tonga · 18514 days ago · 33 km deep · 81 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000e3x. Read Tue, Sep 22, 2026, 6:58 AM UTC.