M4.8 earthquake 100 km NNE of Hihifo, Tonga
A magnitude 4.8 earthquake struck 100 km NNE of Hihifo, Tonga on Thu, Jun 23, 1977, 8:21 PM GMT-11 (07:21 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M6.2 96 km NE 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
- 1977-06-24 07:21:08 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 15.141° S, 173.378° 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
- 19
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
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
- 6.296 km NE of Hihifo, Tonga · 17957 days ago · 33 km deep · 33 km away
- 5.1135 km NNE of Hihifo, Tonga · 17929 days ago · 33 km deep · 42 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000pew. Read Tue, Sep 22, 2026, 8:07 AM UTC.