M4.6 earthquake 72 km S of Hihifo, Tonga
A magnitude 4.6 earthquake struck 72 km S of Hihifo, Tonga on Mon, Aug 11, 1975, 2:29 PM GMT-11 (01:29 UTC), 43 km (27 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1975-08-12 01:29:47 UTC
- Depth
- 43.0 km (26.7 mi), shallow
- Epicenter
- 16.606° S, 173.771° 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
- 10
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 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 usp0000cem. Read Tue, Sep 22, 2026, 9:57 AM UTC.