M4.8 earthquake 143 km SW of Hihifo, Tonga
A magnitude 4.8 earthquake struck 143 km SW of Hihifo, Tonga on Fri, Jul 18, 1986, 4:05 AM GMT-12 (16:05 UTC), 145 km (90 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
- 1986-07-18 16:05:24 UTC
- Depth
- 145.3 km (90.3 mi), intermediate-depth
- Epicenter
- 16.943° S, 174.661° 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
- FROM_LOCATION
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 usp0002w4y. Read Tue, Sep 22, 2026, 7:45 AM UTC.