Tonga earthquakes

M4.5 earthquake 108 km NE of Hihifo, Tonga

A magnitude 4.5 earthquake struck 108 km NE of Hihifo, Tonga on Sat, Jul 17, 2021, 3:18 PM GMT+13 (02:18 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.0 85 km N 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
2021-07-17 02:18:10 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
15.195° S, 173.158° 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, 1.9 km in depth
Magnitude uncertainty
±0.14
Depth from
Operator assigned
Station coverage gap
146°
Stations used
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.570 km N of Hihifo, Tonga · 1894 days ago · 74 km deep · 84 km away
  2. 5.085 km N of Hihifo, Tonga · 1893 days ago · 10 km deep · 72 km away
  3. 4.896 km N of Hihifo, Tonga · 1893 days ago · 93 km deep · 78 km away
  4. 4.881 km NE of Hihifo, Tonga · 1891 days ago · 32 km deep · 31 km away · felt by 7
  5. 4.6105 km NNE of Hihifo, Tonga · 1886 days ago · 10 km deep · 33 km away
  6. 4.898 km NE of Hihifo, Tonga · 1881 days ago · 10 km deep · 10 km away
  7. 4.953 km NE of Hihifo, Tonga · 1878 days ago · 78 km deep · 55 km away
  8. 4.545 km N of Hihifo, Tonga · 1867 days ago · 67 km deep · 77 km away
  9. 4.568 km N of Hihifo, Tonga · 1866 days ago · 133 km deep · 58 km away
  10. 4.9108 km NE of Hihifo, Tonga · 1859 days ago · 10 km deep · 16 km away
  11. 4.535 km N of Hihifo, Tonga · 1857 days ago · 83 km deep · 85 km away
  12. 4.692 km NNE of Hihifo, Tonga · 1852 days ago · 10 km deep · 50 km away
  13. 4.566 km E of Hihifo, Tonga · 1851 days ago · 35 km deep · 75 km away
  14. 4.7106 km NE of Hihifo, Tonga · 1849 days ago · 10 km deep · 22 km away
  15. 4.7124 km E of Hihifo, Tonga · 1848 days ago · 10 km deep · 89 km away
  16. 4.828 km N of Hihifo, Tonga · 1842 days ago · 59 km deep · 91 km away
  17. 4.995 km N of Hihifo, Tonga · 1842 days ago · 110 km deep · 81 km away · felt by 1

Before

  1. 4.753 km ENE of Hihifo, Tonga · 1907 days ago · 35 km deep · 65 km away
  2. 5.075 km E of Hihifo, Tonga · 1909 days ago · 10 km deep · 88 km away
  3. 4.690 km NNE of Hihifo, Tonga · 1912 days ago · 10 km deep · 36 km away
  4. 4.7106 km N of Hihifo, Tonga · 1916 days ago · 10 km deep · 60 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000ey0p. Read Wed, Sep 30, 2026, 9:38 AM UTC.