M5.5 earthquake 125 km S of ‘Ohonua, Tonga
A magnitude 5.5 earthquake struck 125 km S of ‘Ohonua, Tonga on Sun, Jul 10, 1977, 5:44 AM GMT+13 (16:44 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
- 5.5 (mb), moderate
- Local time
- UTC
- 1977-07-09 16:44:09 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 22.455° S, 175.100° 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
- 86
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 7 in the 60 days after this one and 10 in the 30 days before it.
After
- 5.1215 km SSW of ‘Ohonua, Tonga · 17970 days ago · 42 km deep · 96 km away
- 5.0214 km S of ‘Ohonua, Tonga · 17968 days ago · 63 km deep · 90 km away
- 4.5161 km SSW of ‘Ohonua, Tonga · 17950 days ago · 123 km deep · 44 km away
- 5.1141 km SW of Vaini, Tonga · 17944 days ago · 122 km deep · 95 km away
- 5.0186 km S of ‘Ohonua, Tonga · 17943 days ago · 33 km deep · 63 km away
- 4.9215 km S of ‘Ohonua, Tonga · 17942 days ago · 34 km deep · 93 km away
- 4.9160 km SW of ‘Ohonua, Tonga · 17937 days ago · 33 km deep · 80 km away
Before
- 4.7197 km SSW of ‘Ohonua, Tonga · 17981 days ago · 33 km deep · 94 km away
- 4.9142 km SSW of ‘Ohonua, Tonga · 17981 days ago · 33 km deep · 29 km away
- 5.2204 km S of ‘Ohonua, Tonga · 17982 days ago · 38 km deep · 79 km away
- 5.0137 km SSW of Vaini, Tonga · 17984 days ago · 33 km deep · 78 km away
- 5.4160 km SSW of ‘Ohonua, Tonga · 17985 days ago · 51 km deep · 47 km away
- 4.7146 km SSW of ‘Ohonua, Tonga · 17985 days ago · 33 km deep · 62 km away
- 4.9212 km S of ‘Ohonua, Tonga · 17987 days ago · 33 km deep · 92 km away
- 5.5200 km SSW of ‘Ohonua, Tonga · 17987 days ago · 33 km deep · 99 km away
- 4.6140 km SSW of Vaini, Tonga · 17988 days ago · 128 km deep · 85 km away
- 6.8Tonga region · 17989 days ago · 65 km deep · 95 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000pnk (also filed as gcmtb070977a, gcmt19770709164409, iscgem695732). Read Tue, Sep 22, 2026, 6:17 AM UTC.