Tonga earthquakes

M4.9 earthquake 69 km NE of Kolonga, Tonga

A magnitude 4.9 earthquake struck 69 km NE of Kolonga, Tonga on Tue, Jul 7, 2015, 1:30 AM GMT+13 (12:30 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M5.2 52 km N 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
4.9 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2015-07-06 12:30:48 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
20.707° S, 174.571° 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.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 11.6 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
110°
Stations used
44

Nearest places

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

Nearby

Within 100 km, magnitude 1.9 and up: 7 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 4.880 km ENE of Kolonga, Tonga · 4109 days ago · 35 km deep · 17 km away
  2. 5.1102 km ENE of ‘Ohonua, Tonga · 4109 days ago · 10 km deep · 78 km away
  3. 4.4100 km ENE of ‘Ohonua, Tonga · 4108 days ago · 10 km deep · 74 km away
  4. 5.252 km N of Kolonga, Tonga · 4094 days ago · 10 km deep · 48 km away · felt by 2
  5. 4.073 km NE of Kolonga, Tonga · 4089 days ago · 430 km deep · 4 km away
  6. 4.669 km N of Nuku‘alofa, Tonga · 4085 days ago · 115 km deep · 72 km away
  7. 4.740 km SE of ‘Ohonua, Tonga · 4079 days ago · 11 km deep · 98 km away

Before

  1. 5.875 km NE of Kolonga, Tonga · 4109 days ago · 44 km deep · 7 km away · felt by 9
  2. 4.682 km SE of Pangai, Tonga · 4112 days ago · 10 km deep · 75 km away
  3. 5.285 km E of ‘Ohonua, Tonga · 4115 days ago · 10 km deep · 80 km away
  4. 4.566 km ESE of ‘Ohonua, Tonga · 4124 days ago · 10 km deep · 98 km away
  5. 4.8104 km SSE of Pangai, Tonga · 4129 days ago · 10 km deep · 69 km away
  6. 5.096 km ENE of Kolonga, Tonga · 4133 days ago · 10 km deep · 39 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us20002ztt. Read Mon, Oct 5, 2026, 7:15 AM UTC.