M4.7 earthquake 155 km ESE of Hihifo, Tonga
A magnitude 4.7 earthquake struck 155 km ESE of Hihifo, Tonga on Sat, Feb 28, 1976, 9:51 AM GMT-11 (20:51 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.1 154 km ENE 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
- 4.7 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1976-02-28 20:51:50 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 16.357° S, 172.399° 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
- 15
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 3 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.2186 km ESE of Hihifo, Tonga · 18466 days ago · 33 km deep · 31 km away
- 4.9227 km ESE of Hihifo, Tonga · 18465 days ago · 33 km deep · 86 km away
- 5.1154 km ENE of Hihifo, Tonga · 18447 days ago · 33 km deep · 97 km away
Before
- 4.7181 km ESE of Hihifo, Tonga · 18502 days ago · 33 km deep · 31 km away
- 5.0215 km ESE of Hihifo, Tonga · 18502 days ago · 33 km deep · 72 km away
- 5.3135 km ESE of Hihifo, Tonga · 18502 days ago · 33 km deep · 31 km away
- 5.2166 km SE of Hihifo, Tonga · 18502 days ago · 33 km deep · 57 km away
- 4.4168 km ESE of Hihifo, Tonga · 18505 days ago · 104 km deep · 19 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000f8u. Read Thu, Oct 1, 2026, 2:16 PM UTC.