Tonga earthquakes

M4.9 earthquake 212 km S of ‘Ohonua, Tonga

A magnitude 4.9 earthquake struck 212 km S of ‘Ohonua, Tonga on Sat, Jun 25, 1977, 6:18 AM GMT+13 (17:18 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
4.9 (mb), light
Local time
UTC
1977-06-24 17:18:49 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
23.246° S, 174.830° 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
13

Nearest places

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

Nearby

Within 100 km, magnitude 1.9 and up: 16 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 5.4160 km SSW of ‘Ohonua, Tonga · 17993 days ago · 51 km deep · 89 km away
  2. 4.7243 km S of ‘Ohonua, Tonga · 17991 days ago · 47 km deep · 55 km away
  3. 4.8244 km S of ‘Ohonua, Tonga · 17991 days ago · 33 km deep · 61 km away
  4. 5.2204 km S of ‘Ohonua, Tonga · 17990 days ago · 38 km deep · 39 km away
  5. 4.7236 km S of ‘Ohonua, Tonga · 17990 days ago · 33 km deep · 50 km away
  6. 4.9142 km SSW of ‘Ohonua, Tonga · 17990 days ago · 33 km deep · 93 km away
  7. 4.8278 km SSW of ‘Ohonua, Tonga · 17989 days ago · 33 km deep · 98 km away
  8. 5.5125 km S of ‘Ohonua, Tonga · 17980 days ago · 33 km deep · 92 km away
  9. 5.1215 km SSW of ‘Ohonua, Tonga · 17978 days ago · 42 km deep · 81 km away
  10. 5.0214 km S of ‘Ohonua, Tonga · 17976 days ago · 63 km deep · 49 km away
  11. 4.4269 km S of ‘Ohonua, Tonga · 17976 days ago · 33 km deep · 70 km away
  12. 4.5161 km SSW of ‘Ohonua, Tonga · 17958 days ago · 123 km deep · 83 km away
  13. 5.0186 km S of ‘Ohonua, Tonga · 17951 days ago · 33 km deep · 32 km away
  14. 4.9215 km S of ‘Ohonua, Tonga · 17950 days ago · 34 km deep · 12 km away
  15. 5.3224 km SSW of ‘Ohonua, Tonga · 17943 days ago · 33 km deep · 57 km away
  16. 4.8204 km SSE of ‘Ohonua, Tonga · 17937 days ago · 33 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000pf5. Read Wed, Sep 30, 2026, 10:53 AM UTC.