Tonga earthquakes

M3.9 earthquake 124 km NNE of Hihifo, Tonga

A magnitude 3.9 earthquake struck 124 km NNE of Hihifo, Tonga on Sun, Oct 21, 2007, 9:32 AM GMT-11 (20:32 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M6.2 147 km SSW of Lotofag?, Samoa. 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
3.9 (mb, body-wave), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2007-10-21 20:32:24 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
14.985° S, 173.214° W
Region
Tonga
Tsunami flag
No
Status
Reviewed by a seismologist

What happened

The USGS’s account of the effects of this earthquake.

no people dead or missing; no people injured; no buildings damaged or destroyed

From the USGS event page for usp000fr15. U.S. Geological Survey text and figures are in the public domain.

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
Station coverage gap
187°, poorly surrounded by stations
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 5.793 km NE of Hihifo, Tonga · 6911 days ago · 10 km deep · 44 km away
  2. 5.2130 km ENE of Hihifo, Tonga · 6911 days ago · 10 km deep · 60 km away
  3. 5.887 km ENE of Hihifo, Tonga · 6911 days ago · 10 km deep · 69 km away
  4. 4.3100 km NNE of Hihifo, Tonga · 6910 days ago · 10 km deep · 30 km away
  5. 4.5117 km SW of Gataivai, Samoa · 6906 days ago · 54 km deep · 44 km away
  6. 3.969 km NNE of Hihifo, Tonga · 6890 days ago · 35 km deep · 61 km away
  7. 4.691 km N of Hihifo, Tonga · 6889 days ago · 35 km deep · 53 km away
  8. 4.094 km NNE of Hihifo, Tonga · 6879 days ago · 35 km deep · 30 km away
  9. 6.2147 km SSW of Lotofag?, Samoa · 6869 days ago · 17 km deep · 94 km away · felt by 3
  10. 4.574 km NE of Hihifo, Tonga · 6863 days ago · 10 km deep · 65 km away
  11. 4.694 km ENE of Hihifo, Tonga · 6862 days ago · 10 km deep · 58 km away

Before

  1. 4.572 km ENE of Hihifo, Tonga · 6932 days ago · 10 km deep · 74 km away
  2. 5.492 km NE of Hihifo, Tonga · 6934 days ago · 10 km deep · 44 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp000fr15. Read Sun, Oct 4, 2026, 1:59 AM UTC.