M5.1 earthquake 120 km SSE of Pangai, Tonga
A magnitude 5.1 earthquake struck 120 km SSE of Pangai, Tonga on Thu, Apr 24, 1975, 3:41 AM GMT+13 (14:41 UTC), 40 km (25 mi) below the surface.
A larger quake followed: M6.0 108 km ENE 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
- 1975-04-23 14:41:08 UTC
- Depth
- 40.0 km (24.9 mi), shallow
- Epicenter
- 20.806° S, 173.885° 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
- 30
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.1 and up: 9 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.173 km E of ‘Ohonua, Tonga · 18769 days ago · 25 km deep · 79 km away
- 6.0108 km ENE of ‘Ohonua, Tonga · 18763 days ago · 43 km deep · 21 km away
- 4.7121 km SSE of Pangai, Tonga · 18759 days ago · 33 km deep · 5 km away
- 5.5131 km ENE of ‘Ohonua, Tonga · 18758 days ago · 19 km deep · 16 km away
- 5.1118 km SSE of Pangai, Tonga · 18758 days ago · 33 km deep · 4 km away
- 5.064 km S of Pangai, Tonga · 18737 days ago · 39 km deep · 66 km away
- 5.1101 km SSE of Pangai, Tonga · 18737 days ago · 33 km deep · 19 km away
- 5.075 km E of ‘Ohonua, Tonga · 18732 days ago · 33 km deep · 74 km away
- 4.677 km SE of Pangai, Tonga · 18730 days ago · 33 km deep · 58 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000as8. Read Thu, Oct 1, 2026, 7:52 AM UTC.