M4.9 earthquake 141 km SSW of ‘Ohonua, Tonga
A magnitude 4.9 earthquake struck 141 km SSW of ‘Ohonua, Tonga on Sun, Sep 16, 1973, 6:32 AM GMT+13 (17:32 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
- 4.9 (mb), light
- Local time
- UTC
- 1973-09-15 17:32:55 UTC
- Depth
- 39.0 km (24.2 mi), shallow
- Epicenter
- 22.540° S, 175.403° 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
- CONSTRAINED_BY_DEPTH_PHASES
- Stations used
- 18
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 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 usp00003em. Read Tue, Sep 22, 2026, 7:58 AM UTC.