Tonga earthquakes

M4.6 earthquake 164 km ESE of Hihifo, Tonga

A magnitude 4.6 earthquake struck 164 km ESE of Hihifo, Tonga on Mon, Dec 29, 1975, 10:34 AM GMT-11 (21:34 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M4.8 134 km ESE of Hihifo, Tonga. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
4.6 (mb), light
Local time
UTC
1975-12-29 21:34:22 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
16.529° S, 172.374° 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
22

Nearest places

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

Nearby

Within 100 km, magnitude 1.6 and up: 15 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 4.8134 km ESE of Hihifo, Tonga · 18530 days ago · 33 km deep · 41 km away
  2. 5.2137 km ENE of Hihifo, Tonga · 18530 days ago · 69 km deep · 96 km away
  3. 5.7123 km SE of Hihifo, Tonga · 18527 days ago · 33 km deep · 51 km away
  4. 5.3Samoa Islands region · 18527 days ago · 33 km deep · 57 km away
  5. 5.4129 km ESE of Hihifo, Tonga · 18527 days ago · 33 km deep · 38 km away
  6. 4.8111 km ESE of Hihifo, Tonga · 18527 days ago · 33 km deep · 53 km away
  7. 5.3175 km ESE of Hihifo, Tonga · 18513 days ago · 33 km deep · 19 km away
  8. 5.3157 km SE of Hihifo, Tonga · 18509 days ago · 33 km deep · 39 km away
  9. 5.5138 km E of Hihifo, Tonga · 18502 days ago · 36 km deep · 66 km away
  10. 4.9184 km ESE of Hihifo, Tonga · 18501 days ago · 44 km deep · 21 km away
  11. 4.4168 km ESE of Hihifo, Tonga · 18496 days ago · 104 km deep · 33 km away
  12. 5.2166 km SE of Hihifo, Tonga · 18493 days ago · 33 km deep · 40 km away
  13. 5.3135 km ESE of Hihifo, Tonga · 18493 days ago · 33 km deep · 30 km away
  14. 5.0215 km ESE of Hihifo, Tonga · 18493 days ago · 33 km deep · 55 km away
  15. 4.7181 km ESE of Hihifo, Tonga · 18493 days ago · 33 km deep · 17 km away

Before

  1. 4.9117 km E of Hihifo, Tonga · 18530 days ago · 35 km deep · 73 km away
  2. 4.9123 km E of Hihifo, Tonga · 18532 days ago · 31 km deep · 58 km away
  3. 5.078 km E of Hihifo, Tonga · 18532 days ago · 33 km deep · 90 km away
  4. 5.0167 km ESE of Hihifo, Tonga · 18533 days ago · 33 km deep · 5 km away
  5. 5.0103 km E of Hihifo, Tonga · 18533 days ago · 33 km deep · 82 km away
  6. 4.8103 km E of Hihifo, Tonga · 18533 days ago · 39 km deep · 81 km away
  7. 5.1114 km E of Hihifo, Tonga · 18533 days ago · 38 km deep · 59 km away
  8. 5.1234 km ESE of Hihifo, Tonga · 18533 days ago · 33 km deep · 70 km away
  9. 4.9170 km ESE of Hihifo, Tonga · 18533 days ago · 33 km deep · 6 km away
  10. 5.492 km E of Hihifo, Tonga · 18533 days ago · 33 km deep · 80 km away
  11. 4.9171 km ESE of Hihifo, Tonga · 18533 days ago · 33 km deep · 32 km away
  12. 4.8170 km ESE of Hihifo, Tonga · 18533 days ago · 33 km deep · 12 km away
  13. 7.8146 km ESE of Hihifo, Tonga · 18533 days ago · 33 km deep · 31 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000e5f. Read Tue, Sep 22, 2026, 5:28 PM UTC.