M4.8 earthquake 139 km W of Hihifo, Tonga
A magnitude 4.8 earthquake struck 139 km W of Hihifo, Tonga on Tue, Jul 4, 1978, 4:09 AM GMT-12 (16:09 UTC), 294 km (183 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.8 (mb), light
- Local time
- UTC
- 1978-07-04 16:09:17 UTC
- Depth
- 294.0 km (182.7 mi), intermediate-depth
- Epicenter
- 16.098° S, 175.089° 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
- 13
Nearby
Within 100 km, magnitude 1.8 and up: 0 in the 60 days after this one and 1 in the 30 days before it.
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000ve7. Read Tue, Sep 29, 2026, 8:49 AM UTC.