Tonga earthquakes

M4.6 earthquake 20 km WSW of Hihifo, Tonga

A magnitude 4.6 earthquake struck 20 km WSW of Hihifo, Tonga on Sun, Jul 25, 2021, 1:21 PM GMT+13 (00:21 UTC), 113 km (71 mi) below the surface.

A larger quake followed: M5.3 87 km SSE 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
4.6 (mb), light
Local time
UTC
2021-07-25 00:21:23 UTC
Depth
113.5 km (70.5 mi), intermediate-depth
Epicenter
16.003° S, 173.983° 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 10.3 km horizontally, 5.3 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
64°
Stations used
84

Nearest places

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

Nearby

Within 100 km, magnitude 1.6 and up: 19 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 5.085 km N of Hihifo, Tonga · 1893 days ago · 10 km deep · 93 km away
  2. 4.579 km SE of Hihifo, Tonga · 1893 days ago · 68 km deep · 88 km away
  3. 4.875 km NW of Hihifo, Tonga · 1892 days ago · 175 km deep · 65 km away
  4. 4.881 km NE of Hihifo, Tonga · 1891 days ago · 32 km deep · 100 km away · felt by 7
  5. 5.387 km SSE of Hihifo, Tonga · 1888 days ago · 10 km deep · 90 km away
  6. 4.666 km S of Hihifo, Tonga · 1879 days ago · 70 km deep · 66 km away
  7. 4.953 km NE of Hihifo, Tonga · 1879 days ago · 78 km deep · 72 km away
  8. 4.551 km SE of Hihifo, Tonga · 1878 days ago · 65 km deep · 67 km away
  9. 4.545 km N of Hihifo, Tonga · 1867 days ago · 67 km deep · 56 km away
  10. 4.568 km N of Hihifo, Tonga · 1866 days ago · 133 km deep · 80 km away
  11. 4.386 km SSW of Hihifo, Tonga · 1865 days ago · 70 km deep · 74 km away
  12. 4.6Tonga · 1863 days ago · 69 km deep · 15 km away
  13. 4.535 km N of Hihifo, Tonga · 1857 days ago · 83 km deep · 45 km away
  14. 4.566 km E of Hihifo, Tonga · 1851 days ago · 35 km deep · 87 km away
  15. 4.86 km S of Hihifo, Tonga · 1849 days ago · 82 km deep · 20 km away
  16. 5.279 km NW of Hihifo, Tonga · 1844 days ago · 187 km deep · 73 km away
  17. 4.828 km N of Hihifo, Tonga · 1843 days ago · 59 km deep · 38 km away
  18. 4.486 km WSW of Hihifo, Tonga · 1840 days ago · 190 km deep · 66 km away
  19. 5.121 km NNE of Hihifo, Tonga · 1838 days ago · 67 km deep · 38 km away · felt by 3

Before

  1. 4.570 km N of Hihifo, Tonga · 1894 days ago · 74 km deep · 75 km away
  2. 4.843 km SSE of Hihifo, Tonga · 1895 days ago · 51 km deep · 48 km away
  3. 4.753 km ENE of Hihifo, Tonga · 1907 days ago · 35 km deep · 74 km away
  4. 5.075 km E of Hihifo, Tonga · 1909 days ago · 10 km deep · 95 km away
  5. 4.357 km SE of Hihifo, Tonga · 1913 days ago · 10 km deep · 68 km away
  6. 4.417 km NNW of Hihifo, Tonga · 1918 days ago · 35 km deep · 25 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000eyt0. Read Wed, Sep 30, 2026, 11:30 AM UTC.