M4.4 earthquake 164 km W of Hihifo, Tonga
A magnitude 4.4 earthquake struck 164 km W of Hihifo, Tonga on Tue, Apr 20, 1976, 8:36 AM GMT-12 (20:36 UTC), 331 km (206 mi) below the surface.
A larger quake followed: M5.5 138 km W 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
- 4.4 (mb), light
- Local time
- UTC
- 1976-04-20 20:36:12 UTC
- Depth
- 331.0 km (205.7 mi), deep
- Epicenter
- 16.073° S, 175.331° 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.
- Stations used
- 21
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000fze. Read Wed, Sep 30, 2026, 4:23 AM UTC.