Tonga earthquakes

M4.5 earthquake 66 km E of Hihifo, Tonga

A magnitude 4.5 earthquake struck 66 km E of Hihifo, Tonga on Mon, Sep 6, 2021, 10:26 AM GMT+13 (21:26 UTC), 35 km (22 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
2021-09-05 21:26:29 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
15.869° S, 173.181° 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 12.5 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
124°
Stations used
23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 4.7106 km NE of Hihifo, Tonga · 1849 days ago · 10 km deep · 60 km away
  2. 4.86 km S of Hihifo, Tonga · 1849 days ago · 82 km deep · 67 km away
  3. 4.7124 km E of Hihifo, Tonga · 1848 days ago · 10 km deep · 57 km away
  4. 4.828 km N of Hihifo, Tonga · 1842 days ago · 59 km deep · 71 km away
  5. 5.121 km NNE of Hihifo, Tonga · 1838 days ago · 67 km deep · 58 km away · felt by 3
  6. 4.3105 km NNE of Hihifo, Tonga · 1833 days ago · 149 km deep · 86 km away
  7. 4.371 km NE of Hihifo, Tonga · 1830 days ago · 35 km deep · 36 km away
  8. 4.557 km SE of Hihifo, Tonga · 1829 days ago · 57 km deep · 65 km away
  9. 5.481 km NE of Hihifo, Tonga · 1820 days ago · 35 km deep · 51 km away · felt by 4
  10. 4.331 km ESE of Hihifo, Tonga · 1810 days ago · 107 km deep · 44 km away
  11. 4.6106 km ESE of Hihifo, Tonga · 1797 days ago · 10 km deep · 51 km away
  12. 4.313 km E of Hihifo, Tonga · 1793 days ago · 71 km deep · 54 km away
  13. 4.774 km SSE of Hihifo, Tonga · 1793 days ago · 10 km deep · 93 km away
  14. 4.294 km NE of Hihifo, Tonga · 1792 days ago · 10 km deep · 51 km away

Before

  1. 4.692 km NNE of Hihifo, Tonga · 1851 days ago · 10 km deep · 94 km away
  2. 4.535 km N of Hihifo, Tonga · 1856 days ago · 83 km deep · 72 km away
  3. 4.9108 km NE of Hihifo, Tonga · 1859 days ago · 10 km deep · 65 km away
  4. 4.6Tonga · 1863 days ago · 69 km deep · 92 km away
  5. 4.568 km N of Hihifo, Tonga · 1866 days ago · 133 km deep · 78 km away
  6. 4.545 km N of Hihifo, Tonga · 1867 days ago · 67 km deep · 73 km away
  7. 4.551 km SE of Hihifo, Tonga · 1878 days ago · 65 km deep · 48 km away
  8. 4.953 km NE of Hihifo, Tonga · 1878 days ago · 78 km deep · 44 km away
  9. 4.666 km S of Hihifo, Tonga · 1879 days ago · 70 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000fath. Read Wed, Sep 30, 2026, 4:48 AM UTC.