M6.1 earthquake 79 km ESE of Hihifo, Tonga
A magnitude 6.1 earthquake struck 79 km ESE of Hihifo, Tonga on Sun, Aug 5, 1973, 4:47 AM GMT-11 (15:47 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.1 (mb), strong
- Local time
- UTC
- 1973-08-05 15:47:32 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 16.231° S, 173.110° 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
- OPERATOR_ASSIGNED
- Stations used
- 132
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.2139 km SSE of Hihifo, Tonga · 19382 days ago · 33 km deep · 97 km away
- 5.1Samoa Islands region · 19379 days ago · 33 km deep · 68 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000306 (also filed as iscgem757004). Read Tue, Sep 22, 2026, 7:07 AM UTC.