M4.7 earthquake 73 km S of Hihifo, Tonga
A magnitude 4.7 earthquake struck 73 km S of Hihifo, Tonga on Sat, Oct 18, 1975, 12:07 AM GMT-11 (11:07 UTC), 39 km (24 mi) below the surface.
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
- 1975-10-18 11:07:38 UTC
- Depth
- 39.0 km (24.2 mi), shallow
- Epicenter
- 16.612° S, 173.916° 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
- 14
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 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 usp0000d6b. Read Tue, Sep 22, 2026, 8:20 AM UTC.