M4.9 earthquake 96 km NW of Hihifo, Tonga
A magnitude 4.9 earthquake struck 96 km NW of Hihifo, Tonga on Thu, Oct 28, 1976, 2:40 PM GMT-11 (01:40 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.0 144 km WNW 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
- 4.9 (mb), light
- Local time
- UTC
- 1976-10-29 01:40:26 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 15.282° S, 174.371° 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
- 10
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 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 usp0000k3c. Read Wed, Sep 30, 2026, 4:54 PM UTC.