M7.6 earthquake 199 km ESE of Hihifo, Tonga
A magnitude 7.6 earthquake struck 199 km ESE of Hihifo, Tonga on Fri, Apr 1, 1977, 8:15 PM GMT-11 (07:15 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 7.6 (ms), major
- Local time
- UTC
- 1977-04-02 07:15:22 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 16.696° S, 172.095° W
- Region
- Tonga
- Strongest shaking
- IV, light shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- IV, light shaking
- Peak ground acceleration
- 1.7% of gravity
- Peak ground velocity
- 1.3 cm/s
- Map
- Automatic
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
- 181
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 11 in the 60 days after this one and 0 in the 30 days before it.
After
- 5.1134 km ESE of Hihifo, Tonga · 18070 days ago · 33 km deep · 65 km away
- 4.8226 km ESE of Hihifo, Tonga · 18070 days ago · 33 km deep · 31 km away
- 4.9207 km SE of Hihifo, Tonga · 18068 days ago · 68 km deep · 76 km away
- 4.9209 km NE of Neiafu, Tonga · 18063 days ago · 35 km deep · 91 km away
- 4.7174 km ESE of Hihifo, Tonga · 18062 days ago · 33 km deep · 25 km away
- 5.1194 km SE of Hihifo, Tonga · 18057 days ago · 33 km deep · 96 km away
- 5.1152 km ESE of Hihifo, Tonga · 18050 days ago · 33 km deep · 48 km away
- 4.7126 km ESE of Hihifo, Tonga · 18048 days ago · 33 km deep · 76 km away
- 4.9128 km ESE of Hihifo, Tonga · 18047 days ago · 33 km deep · 76 km away
- 5.2221 km SE of Hihifo, Tonga · 18037 days ago · 33 km deep · 51 km away
- 4.4133 km ESE of Hihifo, Tonga · 18034 days ago · 62 km deep · 66 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000n82 (also filed as gcmtc040277a, gcmt19770402071522, iscgem699272). Read Tue, Sep 22, 2026, 11:00 AM UTC.