M4.6 earthquake 66 km SW of Haveluloto, Tonga
A magnitude 4.6 earthquake struck 66 km SW of Haveluloto, Tonga on Tue, Feb 7, 1978, 4:27 PM GMT+13 (03:27 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M6.3 62 km S of ‘Ohonua, 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, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1978-02-07 03:27:28 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 21.534° S, 175.710° 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
- 9
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 6.362 km S of ‘Ohonua, Tonga · 17746 days ago · 33 km deep · 97 km away
- 4.8Tonga · 17738 days ago · 33 km deep · 94 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000suv. Read Sat, Oct 3, 2026, 4:49 PM UTC.