M4.5 earthquake 108 km S of Hihifo, Tonga
A magnitude 4.5 earthquake struck 108 km S of Hihifo, Tonga on Tue, Jun 28, 1977, 10:27 AM GMT-11 (21:27 UTC), 37 km (23 mi) below the surface.
A larger quake followed: M5.3 142 km NNE of Neiafu, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb), light
- Local time
- UTC
- 1977-06-28 21:27:53 UTC
- Depth
- 37.0 km (23.0 mi), shallow
- Epicenter
- 16.919° S, 173.632° 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
- 12
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 0 in the 30 days before it.
After
- 5.3142 km NNE of Neiafu, Tonga · 17988 days ago · 68 km deep · 59 km away
- 5.098 km S of Hihifo, Tonga · 17987 days ago · 50 km deep · 10 km away
- 5.1140 km SSW of Hihifo, Tonga · 17981 days ago · 153 km deep · 81 km away
- 4.8128 km SSE of Hihifo, Tonga · 17962 days ago · 46 km deep · 26 km away
- 4.5120 km SSE of Hihifo, Tonga · 17945 days ago · 33 km deep · 20 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000phm. Read Tue, Sep 29, 2026, 4:15 PM UTC.