M4.7 earthquake 148 km SSW of ‘Ohonua, Tonga
A magnitude 4.7 earthquake struck 148 km SSW of ‘Ohonua, Tonga on Sat, Apr 8, 1978, 2:56 PM GMT+13 (01:56 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb), light
- Local time
- UTC
- 1978-04-08 01:56:56 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 22.646° S, 175.238° 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
- 14
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.6134 km SSE of ‘Ohonua, Tonga · 17654 days ago · 33 km deep · 58 km away
- 4.1122 km S of ‘Ohonua, Tonga · 17648 days ago · 33 km deep · 53 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000tz6. Read Wed, Sep 30, 2026, 1:03 PM UTC.