Tonga earthquakes

M5.1 earthquake 101 km SSE of Pangai, Tonga

A magnitude 5.1 earthquake struck 101 km SSE of Pangai, Tonga on Sat, Jun 14, 1975, 5:05 PM GMT+13 (04:05 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.7 85 km E 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
5.1 (mb), moderate
Local time
UTC
1975-06-14 04:05:16 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
20.662° S, 173.990° 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
40

Nearest places

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

Nearby

Within 100 km, magnitude 2.1 and up: 7 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 5.075 km E of ‘Ohonua, Tonga · 18731 days ago · 33 km deep · 85 km away
  2. 4.677 km SE of Pangai, Tonga · 18729 days ago · 33 km deep · 45 km away
  3. 5.490 km SSE of Pangai, Tonga · 18725 days ago · 23 km deep · 19 km away
  4. 5.785 km E of ‘Ohonua, Tonga · 18716 days ago · 15 km deep · 68 km away
  5. 5.093 km E of Pangai, Tonga · 18712 days ago · 12 km deep · 95 km away
  6. 4.9117 km E of ‘Ohonua, Tonga · 18706 days ago · 33 km deep · 56 km away
  7. 4.856 km NE of ‘Ohonua, Tonga · 18676 days ago · 109 km deep · 68 km away

Before

  1. 5.064 km S of Pangai, Tonga · 18736 days ago · 39 km deep · 47 km away
  2. 5.1118 km SSE of Pangai, Tonga · 18757 days ago · 33 km deep · 19 km away
  3. 5.5131 km ENE of ‘Ohonua, Tonga · 18757 days ago · 19 km deep · 36 km away
  4. 4.7121 km SSE of Pangai, Tonga · 18758 days ago · 33 km deep · 22 km away
  5. 6.0108 km ENE of ‘Ohonua, Tonga · 18762 days ago · 43 km deep · 34 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000bhp. Read Tue, Sep 29, 2026, 10:58 PM UTC.