Tonga earthquakes

M4.5 earthquake 35 km N of Hihifo, Tonga

A magnitude 4.5 earthquake struck 35 km N of Hihifo, Tonga on Tue, Aug 31, 2021, 7:25 AM GMT+13 (18:25 UTC), 83 km (51 mi) below the surface.

A larger quake followed: M5.4 81 km NE 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
4.5 (mb), light
Local time
UTC
2021-08-30 18:25:54 UTC
Depth
82.7 km (51.4 mi), intermediate-depth
Epicenter
15.635° S, 173.809° 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 14.9 km horizontally, 8.8 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
134°
Stations used
22

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 4.692 km NNE of Hihifo, Tonga · 1852 days ago · 10 km deep · 59 km away
  2. 4.566 km E of Hihifo, Tonga · 1851 days ago · 35 km deep · 72 km away
  3. 4.7106 km NE of Hihifo, Tonga · 1849 days ago · 10 km deep · 90 km away
  4. 4.86 km S of Hihifo, Tonga · 1849 days ago · 82 km deep · 42 km away
  5. 5.279 km NW of Hihifo, Tonga · 1844 days ago · 187 km deep · 58 km away
  6. 4.828 km N of Hihifo, Tonga · 1843 days ago · 59 km deep · 7 km away
  7. 4.995 km N of Hihifo, Tonga · 1842 days ago · 110 km deep · 61 km away · felt by 1
  8. 5.121 km NNE of Hihifo, Tonga · 1838 days ago · 67 km deep · 19 km away · felt by 3
  9. 4.3105 km NNE of Hihifo, Tonga · 1833 days ago · 149 km deep · 77 km away
  10. 4.371 km NE of Hihifo, Tonga · 1830 days ago · 35 km deep · 58 km away
  11. 4.557 km SE of Hihifo, Tonga · 1829 days ago · 57 km deep · 90 km away
  12. 5.481 km NE of Hihifo, Tonga · 1820 days ago · 35 km deep · 62 km away · felt by 4
  13. 4.331 km ESE of Hihifo, Tonga · 1811 days ago · 107 km deep · 58 km away

Before

  1. 4.9108 km NE of Hihifo, Tonga · 1859 days ago · 10 km deep · 89 km away
  2. 4.6Tonga · 1863 days ago · 69 km deep · 59 km away
  3. 4.568 km N of Hihifo, Tonga · 1866 days ago · 133 km deep · 35 km away
  4. 4.545 km N of Hihifo, Tonga · 1867 days ago · 67 km deep · 11 km away
  5. 4.551 km SE of Hihifo, Tonga · 1878 days ago · 65 km deep · 80 km away
  6. 4.953 km NE of Hihifo, Tonga · 1879 days ago · 78 km deep · 37 km away
  7. 4.898 km NE of Hihifo, Tonga · 1881 days ago · 10 km deep · 75 km away
  8. 4.6105 km NNE of Hihifo, Tonga · 1886 days ago · 10 km deep · 75 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000f99x. Read Wed, Sep 30, 2026, 12:21 PM UTC.