Tonga earthquakes

M5.0 earthquake 137 km SSW of Vaini, Tonga

A magnitude 5.0 earthquake struck 137 km SSW of Vaini, Tonga on Mon, Jun 27, 1977, 12:52 PM GMT+13 (23:52 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.5 125 km S of ‘Ohonua, Tonga. This one was a foreshock.

Nuku‘alofa forecastMore in Tonga

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
5.0 (mb), moderate
Local time
UTC
1977-06-26 23:52:57 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
22.271° S, 175.833° 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
10

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 2.0 and up: 11 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 4.9142 km SSW of ‘Ohonua, Tonga · 17981 days ago · 33 km deep · 59 km away
  2. 4.7197 km SSW of ‘Ohonua, Tonga · 17981 days ago · 33 km deep · 68 km away
  3. 4.3199 km SW of Vaini, Tonga · 17973 days ago · 269 km deep · 87 km away
  4. 5.5125 km S of ‘Ohonua, Tonga · 17971 days ago · 33 km deep · 78 km away
  5. 4.9154 km SW of Haveluloto, Tonga · 17965 days ago · 54 km deep · 58 km away
  6. 4.9137 km WSW of Haveluloto, Tonga · 17958 days ago · 294 km deep · 93 km away
  7. 4.5161 km SSW of ‘Ohonua, Tonga · 17950 days ago · 123 km deep · 67 km away
  8. 4.8234 km SW of ‘Ohonua, Tonga · 17947 days ago · 115 km deep · 98 km away
  9. 5.1141 km SW of Vaini, Tonga · 17944 days ago · 122 km deep · 16 km away
  10. 4.5144 km SW of Vaini, Tonga · 17938 days ago · 170 km deep · 31 km away
  11. 4.9160 km SW of ‘Ohonua, Tonga · 17937 days ago · 33 km deep · 25 km away

Before

  1. 5.4160 km SSW of ‘Ohonua, Tonga · 17985 days ago · 51 km deep · 61 km away
  2. 4.7146 km SSW of ‘Ohonua, Tonga · 17985 days ago · 33 km deep · 24 km away
  3. 5.5200 km SSW of ‘Ohonua, Tonga · 17987 days ago · 33 km deep · 70 km away
  4. 4.8200 km SW of ‘Ohonua, Tonga · 17987 days ago · 98 km deep · 65 km away
  5. 4.5190 km SSW of Vaini, Tonga · 17988 days ago · 138 km deep · 53 km away
  6. 4.6140 km SSW of Vaini, Tonga · 17988 days ago · 128 km deep · 7 km away
  7. 6.8Tonga region · 17989 days ago · 65 km deep · 68 km away
  8. 4.7231 km SW of ‘Ohonua, Tonga · 17998 days ago · 123 km deep · 95 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000pgc. Read Tue, Sep 22, 2026, 1:10 AM UTC.