M4.6 earthquake 22 km SSE of Hihifo, Tonga
A magnitude 4.6 earthquake struck 22 km SSE of Hihifo, Tonga on Tue, Mar 20, 1973, 10:13 PM GMT-11 (09:13 UTC), 86 km (53 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, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1973-03-21 09:13:29 UTC
- Depth
- 86.0 km (53.4 mi), intermediate-depth
- Epicenter
- 16.132° S, 173.703° 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
- 16
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 1 in the 60 days after this one and 1 in the 30 days before it.
After
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000010p. Read Thu, Oct 1, 2026, 3:57 AM UTC.