M5.4 earthquake 90 km SSE of Pangai, Tonga
A magnitude 5.4 earthquake struck 90 km SSE of Pangai, Tonga on Wed, Jun 25, 1975, 10:15 AM GMT+13 (21:15 UTC), 23 km (14 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
- 5.4 (mb), moderate
- Local time
- UTC
- 1975-06-24 21:15:19 UTC
- Depth
- 23.0 km (14.3 mi), shallow
- Epicenter
- 20.612° S, 174.168° 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
- 61
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.4 and up: 3 in the 60 days after this one and 4 in the 30 days before it.
After
- 5.785 km E of ‘Ohonua, Tonga · 18708 days ago · 15 km deep · 72 km away
- 4.9117 km E of ‘Ohonua, Tonga · 18698 days ago · 33 km deep · 68 km away
- 4.856 km NE of ‘Ohonua, Tonga · 18668 days ago · 109 km deep · 58 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000brv (also filed as iscgemsup728175). Read Tue, Sep 22, 2026, 8:44 AM UTC.