Tonga earthquakes

M4.5 earthquake 51 km SE of Hihifo, Tonga

A magnitude 4.5 earthquake struck 51 km SE of Hihifo, Tonga on Tue, Aug 10, 2021, 3:01 AM GMT+13 (14:01 UTC), 65 km (40 mi) below the surface.

A larger quake followed: M5.4 81 km NE of Hihifo, Tonga. This one was a foreshock.

Apia forecastMore in Tonga

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
4.5 (mb), light
Local time
UTC
2021-08-09 14:01:21 UTC
Depth
64.8 km (40.2 mi), shallow
Epicenter
16.239° S, 173.410° 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, 4.9 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
134°
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: 13 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 4.545 km N of Hihifo, Tonga · 1867 days ago · 67 km deep · 87 km away
  2. 4.386 km SSW of Hihifo, Tonga · 1865 days ago · 70 km deep · 97 km away
  3. 4.6Tonga · 1863 days ago · 69 km deep · 63 km away
  4. 4.535 km N of Hihifo, Tonga · 1857 days ago · 83 km deep · 80 km away
  5. 4.566 km E of Hihifo, Tonga · 1851 days ago · 35 km deep · 48 km away
  6. 4.86 km S of Hihifo, Tonga · 1849 days ago · 82 km deep · 48 km away
  7. 4.7124 km E of Hihifo, Tonga · 1848 days ago · 10 km deep · 94 km away
  8. 4.828 km N of Hihifo, Tonga · 1842 days ago · 59 km deep · 75 km away
  9. 5.121 km NNE of Hihifo, Tonga · 1838 days ago · 67 km deep · 61 km away · felt by 3
  10. 4.371 km NE of Hihifo, Tonga · 1830 days ago · 35 km deep · 77 km away
  11. 4.557 km SE of Hihifo, Tonga · 1829 days ago · 57 km deep · 17 km away
  12. 4.5120 km S of Hihifo, Tonga · 1822 days ago · 63 km deep · 91 km away
  13. 5.481 km NE of Hihifo, Tonga · 1820 days ago · 35 km deep · 92 km away · felt by 4

Before

  1. 4.953 km NE of Hihifo, Tonga · 1878 days ago · 78 km deep · 73 km away
  2. 4.666 km S of Hihifo, Tonga · 1879 days ago · 70 km deep · 52 km away
  3. 5.0102 km SSE of Hihifo, Tonga · 1879 days ago · 35 km deep · 60 km away
  4. 5.387 km SSE of Hihifo, Tonga · 1888 days ago · 10 km deep · 59 km away
  5. 4.881 km NE of Hihifo, Tonga · 1891 days ago · 32 km deep · 88 km away · felt by 7
  6. 4.579 km SE of Hihifo, Tonga · 1893 days ago · 68 km deep · 34 km away
  7. 4.620 km WSW of Hihifo, Tonga · 1893 days ago · 113 km deep · 67 km away
  8. 4.843 km SSE of Hihifo, Tonga · 1895 days ago · 51 km deep · 32 km away
  9. 4.753 km ENE of Hihifo, Tonga · 1907 days ago · 35 km deep · 55 km away

Earthquakes todayTonga earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000f7z7. Read Wed, Sep 30, 2026, 10:31 AM UTC.