M5.1 earthquake 140 km SSW of ‘Ohonua, Tonga
A magnitude 5.1 earthquake struck 140 km SSW of ‘Ohonua, Tonga on Wed, Sep 4, 1974, 8:58 PM GMT+13 (07:58 UTC), 58 km (36 mi) below the surface.
A larger quake followed: M5.3 115 km S of ‘Ohonua, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.1 (mb, body-wave), moderate
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1974-09-04 07:58:22 UTC
- Depth
- 58.0 km (36.0 mi), shallow
- Epicenter
- 22.576° S, 175.232° 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
- 23
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.1 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.9160 km SSW of ‘Ohonua, Tonga · 18992 days ago · 33 km deep · 20 km away
- 5.3115 km S of ‘Ohonua, Tonga · 18964 days ago · 33 km deep · 52 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00007xb. Read Thu, Oct 1, 2026, 6:40 PM UTC.