Tonga earthquakes

M4.8 earthquake 28 km N of Hihifo, Tonga

A magnitude 4.8 earthquake struck 28 km N of Hihifo, Tonga on Tue, Sep 14, 2021, 12:33 PM GMT+13 (23:33 UTC), 59 km (37 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
4.8 (mb), light
Local time
UTC
2021-09-13 23:33:34 UTC
Depth
59.2 km (36.8 mi), shallow
Epicenter
15.698° S, 173.823° 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 7.5 km horizontally, 7.4 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
66°
Stations used
30

Nearest places

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

Nearby

Within 100 km, magnitude 1.8 and up: 11 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 4.995 km N of Hihifo, Tonga · 1842 days ago · 110 km deep · 68 km away · felt by 1
  2. 4.486 km WSW of Hihifo, Tonga · 1840 days ago · 190 km deep · 97 km away
  3. 5.121 km NNE of Hihifo, Tonga · 1838 days ago · 67 km deep · 14 km away · felt by 3
  4. 4.3105 km NNE of Hihifo, Tonga · 1833 days ago · 149 km deep · 83 km away
  5. 4.371 km NE of Hihifo, Tonga · 1830 days ago · 35 km deep · 61 km away
  6. 4.557 km SE of Hihifo, Tonga · 1829 days ago · 57 km deep · 84 km away
  7. 5.481 km NE of Hihifo, Tonga · 1820 days ago · 35 km deep · 66 km away · felt by 4
  8. 4.331 km ESE of Hihifo, Tonga · 1811 days ago · 107 km deep · 53 km away
  9. 4.313 km E of Hihifo, Tonga · 1793 days ago · 71 km deep · 35 km away
  10. 4.294 km NE of Hihifo, Tonga · 1792 days ago · 10 km deep · 82 km away
  11. 4.636 km SSE of Hihifo, Tonga · 1789 days ago · 73 km deep · 64 km away

Before

  1. 5.279 km NW of Hihifo, Tonga · 1844 days ago · 187 km deep · 59 km away
  2. 4.86 km S of Hihifo, Tonga · 1849 days ago · 82 km deep · 35 km away
  3. 4.7106 km NE of Hihifo, Tonga · 1849 days ago · 10 km deep · 94 km away
  4. 4.566 km E of Hihifo, Tonga · 1851 days ago · 35 km deep · 71 km away
  5. 4.692 km NNE of Hihifo, Tonga · 1852 days ago · 10 km deep · 66 km away
  6. 4.535 km N of Hihifo, Tonga · 1857 days ago · 83 km deep · 7 km away
  7. 4.9108 km NE of Hihifo, Tonga · 1859 days ago · 10 km deep · 94 km away
  8. 4.6Tonga · 1863 days ago · 69 km deep · 52 km away
  9. 4.568 km N of Hihifo, Tonga · 1866 days ago · 133 km deep · 42 km away
  10. 4.545 km N of Hihifo, Tonga · 1867 days ago · 67 km deep · 18 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000fc57. Read Wed, Sep 30, 2026, 12:21 PM UTC.