M4.6 earthquake 109 km NE of Hihifo, Tonga
A magnitude 4.6 earthquake struck 109 km NE of Hihifo, Tonga on Tue, Mar 25, 1975, 5:09 AM GMT-11 (16:09 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.9 107 km NNE of Hihifo, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1975-03-25 16:09:41 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 15.390° S, 172.952° 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
- 13
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 4 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.9107 km NNE of Hihifo, Tonga · 18786 days ago · 33 km deep · 82 km away
- 4.576 km NNE of Hihifo, Tonga · 18775 days ago · 33 km deep · 62 km away
- 4.9141 km SSW of Gataivai, Samoa · 18754 days ago · 33 km deep · 58 km away
- 5.2110 km NNE of Hihifo, Tonga · 18753 days ago · 2 km deep · 56 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000ac9. Read Tue, Sep 22, 2026, 10:01 AM UTC.