M4.7 earthquake 135 km SSW of Hihifo, Tonga
A magnitude 4.7 earthquake struck 135 km SSW of Hihifo, Tonga on Mon, Dec 3, 1973, 9:27 AM GMT-12 (21:27 UTC), 115 km (71 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
- 1973-12-03 21:27:40 UTC
- Depth
- 115.0 km (71.5 mi), intermediate-depth
- Epicenter
- 17.145° S, 174.073° 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
- 17
Nearby
Within 100 km, magnitude 1.7 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 usp00004dy. Read Wed, Sep 30, 2026, 11:21 PM UTC.