M4.3 earthquake 251 km SE of Hihifo, Tonga
A magnitude 4.3 earthquake struck 251 km SE of Hihifo, Tonga on Fri, May 23, 1975, 6:31 PM GMT-11 (05:31 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.6 Samoa Islands region. 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, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1975-05-24 05:31:57 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 17.278° S, 171.882° 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
- 5
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 2 in the 30 days before it.
After
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000b5f. Read Thu, Oct 1, 2026, 1:51 PM UTC.