M5.1 earthquake 134 km ESE of Hihifo, Tonga
A magnitude 5.1 earthquake struck 134 km ESE of Hihifo, Tonga on Fri, Apr 1, 1977, 11:54 PM GMT-11 (10:54 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.2 221 km SE 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
- 5.1 (mb), moderate
- Local time
- UTC
- 1977-04-02 10:54:00 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 16.429° S, 172.640° 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
- 20
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.1 and up: 9 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.8226 km ESE of Hihifo, Tonga · 18070 days ago · 33 km deep · 94 km away
- 4.9207 km SE of Hihifo, Tonga · 18068 days ago · 68 km deep · 99 km away
- 4.7174 km ESE of Hihifo, Tonga · 18061 days ago · 33 km deep · 40 km away
- 4.3150 km SSE of Hihifo, Tonga · 18059 days ago · 33 km deep · 86 km away
- 5.1152 km ESE of Hihifo, Tonga · 18050 days ago · 33 km deep · 20 km away
- 4.7126 km ESE of Hihifo, Tonga · 18048 days ago · 33 km deep · 22 km away
- 4.9128 km ESE of Hihifo, Tonga · 18047 days ago · 33 km deep · 20 km away
- 5.2221 km SE of Hihifo, Tonga · 18037 days ago · 33 km deep · 97 km away
- 4.4133 km ESE of Hihifo, Tonga · 18034 days ago · 62 km deep · 1 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000n83. Read Tue, Sep 22, 2026, 9:41 AM UTC.