Tonga earthquakes

M4.5 earthquake 66 km ESE of ‘Ohonua, Tonga

A magnitude 4.5 earthquake struck 66 km ESE of ‘Ohonua, Tonga on Sun, Jun 21, 2015, 6:55 PM GMT+13 (05:55 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.8 75 km NE of Kolonga, 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
4.5 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2015-06-21 05:55:07 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
21.570° S, 174.360° 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.

Location uncertainty
About 11.3 km horizontally, 1.5 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
130°
Stations used
42

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 5.3125 km E of ‘Ohonua, Tonga · 4120 days ago · 10 km deep · 63 km away
  2. 5.285 km E of ‘Ohonua, Tonga · 4115 days ago · 10 km deep · 39 km away
  3. 5.875 km NE of Kolonga, Tonga · 4109 days ago · 44 km deep · 96 km away · felt by 9
  4. 4.969 km NE of Kolonga, Tonga · 4109 days ago · 35 km deep · 98 km away
  5. 4.880 km ENE of Kolonga, Tonga · 4109 days ago · 35 km deep · 91 km away
  6. 5.1102 km ENE of ‘Ohonua, Tonga · 4109 days ago · 10 km deep · 61 km away
  7. 4.4100 km ENE of ‘Ohonua, Tonga · 4108 days ago · 10 km deep · 62 km away
  8. 4.2161 km SE of ‘Ohonua, Tonga · 4089 days ago · 10 km deep · 99 km away
  9. 4.073 km NE of Kolonga, Tonga · 4089 days ago · 430 km deep · 100 km away
  10. 5.094 km SE of ‘Ohonua, Tonga · 4079 days ago · 64 km deep · 51 km away · felt by 1
  11. 4.740 km SE of ‘Ohonua, Tonga · 4079 days ago · 11 km deep · 32 km away
  12. 4.4126 km SSE of ‘Ohonua, Tonga · 4072 days ago · 10 km deep · 99 km away

Before

  1. 5.096 km ENE of Kolonga, Tonga · 4133 days ago · 10 km deep · 88 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us10002nnz. Read Mon, Oct 5, 2026, 8:10 AM UTC.