M4.8 earthquake 137 km SW of Hihifo, Tonga
A magnitude 4.8 earthquake struck 137 km SW of Hihifo, Tonga on Sat, Jun 18, 1983, 6:45 PM GMT-12 (06:45 UTC), 286 km (178 mi) below the surface.
A larger quake followed: M5.5 148 km SSW 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
- 4.8 (mb), light
- Local time
- UTC
- 1983-06-19 06:45:14 UTC
- Depth
- 286.2 km (177.8 mi), intermediate-depth
- Epicenter
- 16.729° S, 174.797° 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.
Nearby
Within 100 km, magnitude 1.8 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.6135 km SW of Hihifo, Tonga · 15767 days ago · 33 km deep · 38 km away
- 5.5148 km SSW of Hihifo, Tonga · 15744 days ago · 182 km deep · 51 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001w6m. Read Tue, Sep 22, 2026, 9:38 PM UTC.