Tonga earthquakes

M4.6 earthquake 92 km NNE of Hihifo, Tonga

A magnitude 4.6 earthquake struck 92 km NNE of Hihifo, Tonga on Sun, Sep 5, 2021, 9:16 AM GMT+13 (20:16 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.8 135 km SW of Gataivai, 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
4.6 (mb), light
Local time
UTC
2021-09-04 20:16:05 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
15.137° S, 173.622° 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 13.6 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
124°
Stations used
43

Nearest places

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

Nearby

Within 100 km, magnitude 1.6 and up: 15 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 4.566 km E of Hihifo, Tonga · 1850 days ago · 35 km deep · 94 km away
  2. 4.7106 km NE of Hihifo, Tonga · 1849 days ago · 10 km deep · 68 km away
  3. 4.86 km S of Hihifo, Tonga · 1849 days ago · 82 km deep · 99 km away
  4. 5.279 km NW of Hihifo, Tonga · 1844 days ago · 187 km deep · 79 km away
  5. 4.828 km N of Hihifo, Tonga · 1842 days ago · 59 km deep · 66 km away
  6. 4.995 km N of Hihifo, Tonga · 1842 days ago · 110 km deep · 31 km away · felt by 1
  7. 5.121 km NNE of Hihifo, Tonga · 1838 days ago · 67 km deep · 71 km away · felt by 3
  8. 4.3105 km NNE of Hihifo, Tonga · 1833 days ago · 149 km deep · 30 km away
  9. 4.371 km NE of Hihifo, Tonga · 1830 days ago · 35 km deep · 60 km away
  10. 4.6136 km NNE of Hihifo, Tonga · 1824 days ago · 10 km deep · 60 km away
  11. 5.8135 km SW of Gataivai, Samoa · 1824 days ago · 20 km deep · 68 km away · felt by 3
  12. 4.4129 km SW of Gataivai, Samoa · 1824 days ago · 10 km deep · 72 km away
  13. 5.481 km NE of Hihifo, Tonga · 1820 days ago · 35 km deep · 49 km away · felt by 4
  14. 4.313 km E of Hihifo, Tonga · 1793 days ago · 71 km deep · 93 km away
  15. 4.294 km NE of Hihifo, Tonga · 1792 days ago · 10 km deep · 63 km away

Before

  1. 4.535 km N of Hihifo, Tonga · 1856 days ago · 83 km deep · 59 km away
  2. 4.9108 km NE of Hihifo, Tonga · 1859 days ago · 10 km deep · 63 km away
  3. 4.568 km N of Hihifo, Tonga · 1866 days ago · 133 km deep · 24 km away
  4. 4.545 km N of Hihifo, Tonga · 1867 days ago · 67 km deep · 48 km away
  5. 4.953 km NE of Hihifo, Tonga · 1878 days ago · 78 km deep · 52 km away
  6. 4.898 km NE of Hihifo, Tonga · 1880 days ago · 10 km deep · 42 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000fa1n. Read Wed, Sep 30, 2026, 4:49 AM UTC.