M5.4 earthquake 94 km NE of Hihifo, Tonga
A magnitude 5.4 earthquake struck 94 km NE of Hihifo, Tonga on Sat, Sep 3, 1977, 12:56 AM GMT-11 (11:56 UTC), 18 km (11 mi) below the surface.
A larger quake followed: M5.6 88 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
- 5.4 (mb), moderate
- Local time
- UTC
- 1977-09-03 11:56:18 UTC
- Depth
- 18.0 km (11.2 mi), shallow
- Epicenter
- 15.288° S, 173.239° 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
- 56
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.4 and up: 11 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.688 km NE of Hihifo, Tonga · 17908 days ago · 33 km deep · 12 km away
- 5.681 km NE of Hihifo, Tonga · 17908 days ago · 33 km deep · 14 km away
- 6.077 km NE of Hihifo, Tonga · 17907 days ago · 33 km deep · 19 km away
- 4.885 km NNE of Hihifo, Tonga · 17906 days ago · 33 km deep · 19 km away
- 5.197 km ENE of Hihifo, Tonga · 17906 days ago · 33 km deep · 30 km away
- 5.1132 km ENE of Hihifo, Tonga · 17906 days ago · 4 km deep · 51 km away
- 4.468 km ENE of Hihifo, Tonga · 17899 days ago · 33 km deep · 39 km away
- 5.082 km E of Hihifo, Tonga · 17889 days ago · 33 km deep · 78 km away
- 5.593 km E of Hihifo, Tonga · 17889 days ago · 33 km deep · 90 km away
- 5.984 km ENE of Hihifo, Tonga · 17875 days ago · 33 km deep · 53 km away
- 5.380 km NE of Hihifo, Tonga · 17856 days ago · 30 km deep · 14 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000qfk (also filed as gcmtb090377a, gcmt19770903115618, iscgem692759). Read Tue, Sep 22, 2026, 12:13 PM UTC.