M4.9 earthquake 160 km SW of ‘Ohonua, Tonga
A magnitude 4.9 earthquake struck 160 km SW of ‘Ohonua, Tonga on Sat, Aug 13, 1977, 9:05 AM GMT+13 (20:05 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
- 4.9 (mb), light
- Local time
- UTC
- 1977-08-12 20:05:43 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 22.493° S, 175.876° 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
- 16
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 and up: 2 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.3169 km SSW of ‘Ohonua, Tonga · 17913 days ago · 33 km deep · 65 km away
- 4.8160 km SSW of ‘Ohonua, Tonga · 17891 days ago · 33 km deep · 17 km away
Before
- 4.5144 km SW of Vaini, Tonga · 17945 days ago · 170 km deep · 44 km away
- 5.1141 km SW of Vaini, Tonga · 17951 days ago · 122 km deep · 32 km away
- 4.8234 km SW of ‘Ohonua, Tonga · 17954 days ago · 115 km deep · 75 km away
- 4.5161 km SSW of ‘Ohonua, Tonga · 17957 days ago · 123 km deep · 54 km away
- 4.9154 km SW of Haveluloto, Tonga · 17973 days ago · 54 km deep · 69 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000q2d. Read Tue, Sep 29, 2026, 11:32 AM UTC.