M4.3 earthquake 124 km ENE of Hihifo, Tonga
A magnitude 4.3 earthquake struck 124 km ENE of Hihifo, Tonga on Tue, Mar 18, 1975, 3:33 PM GMT-11 (02:33 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.2 188 km E 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
- 4.3 (mb), light
- Local time
- UTC
- 1975-03-19 02:33:57 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 15.411° S, 172.778° 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
- 12
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 2 in the 30 days before it.
After
- 5.2188 km E of Hihifo, Tonga · 18815 days ago · 33 km deep · 92 km away
- 4.6109 km NE of Hihifo, Tonga · 18809 days ago · 33 km deep · 19 km away
- 5.1174 km S of Matavai, Samoa · 18793 days ago · 15 km deep · 92 km away
- 4.9107 km NNE of Hihifo, Tonga · 18786 days ago · 33 km deep · 99 km away
- 4.576 km NNE of Hihifo, Tonga · 18775 days ago · 33 km deep · 81 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000aa1. Read Tue, Sep 22, 2026, 9:11 AM UTC.