M5.5 earthquake 131 km ENE of ‘Ohonua, Tonga
A magnitude 5.5 earthquake struck 131 km ENE of ‘Ohonua, Tonga on Sat, May 24, 1975, 2:53 PM GMT+13 (01:53 UTC), 19 km (12 mi) below the surface.
A larger quake followed: M5.7 85 km E 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
- 5.5 (ms), moderate
- Local time
- UTC
- 1975-05-24 01:53:38 UTC
- Depth
- 19.0 km (11.8 mi), shallow
- Epicenter
- 20.905° S, 173.767° 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
- 50
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 8 in the 60 days after this one and 3 in the 30 days before it.
After
- 5.1118 km SSE of Pangai, Tonga · 18749 days ago · 33 km deep · 17 km away
- 5.064 km S of Pangai, Tonga · 18728 days ago · 39 km deep · 83 km away
- 5.1101 km SSE of Pangai, Tonga · 18728 days ago · 33 km deep · 36 km away
- 5.075 km E of ‘Ohonua, Tonga · 18723 days ago · 33 km deep · 72 km away
- 4.677 km SE of Pangai, Tonga · 18721 days ago · 33 km deep · 68 km away
- 5.490 km SSE of Pangai, Tonga · 18718 days ago · 23 km deep · 53 km away
- 5.785 km E of ‘Ohonua, Tonga · 18708 days ago · 15 km deep · 54 km away
- 4.9117 km E of ‘Ohonua, Tonga · 18698 days ago · 33 km deep · 27 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000b5c (also filed as iscgem729355). Read Tue, Sep 22, 2026, 10:40 AM UTC.