Tonga earthquakes

M4.3 earthquake 142 km N of Neiafu, Tonga

A magnitude 4.3 earthquake struck 142 km N of Neiafu, Tonga on Tue, Oct 5, 2021, 6:21 AM GMT-12 (18:21 UTC), 105 km (65 mi) below the surface.

A larger quake followed: M5.0 121 km S of Hihifo, Tonga. This one was a foreshock.

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

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The earthquake

Magnitude
4.3 (mb), light
Local time
UTC
2021-10-05 18:21:04 UTC
Depth
104.7 km (65.1 mi), intermediate-depth
Epicenter
17.366° S, 173.971° 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 13.7 km horizontally, 10.3 km in depth
Magnitude uncertainty
±0.20
Depth from
From location
Station coverage gap
148°
Stations used
17

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 4.5162 km SW of Hihifo, Tonga · 1815 days ago · 197 km deep · 80 km away
  2. 4.5108 km SSW of Hihifo, Tonga · 1813 days ago · 156 km deep · 58 km away
  3. 4.1168 km NNW of Neiafu, Tonga · 1804 days ago · 308 km deep · 88 km away
  4. 5.0121 km S of Hihifo, Tonga · 1803 days ago · 75 km deep · 36 km away
  5. 4.1138 km NNE of Neiafu, Tonga · 1796 days ago · 35 km deep · 55 km away
  6. 4.6125 km NNW of Neiafu, Tonga · 1794 days ago · 176 km deep · 68 km away
  7. 4.774 km SSE of Hihifo, Tonga · 1793 days ago · 10 km deep · 94 km away
  8. 4.2144 km NW of Neiafu, Tonga · 1792 days ago · 262 km deep · 93 km away
  9. 4.4131 km SSW of Hihifo, Tonga · 1789 days ago · 219 km deep · 59 km away
  10. 4.2124 km S of Hihifo, Tonga · 1788 days ago · 35 km deep · 44 km away
  11. 4.285 km NNW of Neiafu, Tonga · 1787 days ago · 67 km deep · 75 km away
  12. 4.4137 km N of Neiafu, Tonga · 1780 days ago · 76 km deep · 5 km away
  13. 4.0112 km SW of Hihifo, Tonga · 1769 days ago · 190 km deep · 98 km away
  14. 4.6114 km NE of Neiafu, Tonga · 1764 days ago · 10 km deep · 92 km away

Before

  1. 4.8117 km N of Neiafu, Tonga · 1821 days ago · 98 km deep · 27 km away
  2. 4.5120 km S of Hihifo, Tonga · 1822 days ago · 63 km deep · 52 km away
  3. 4.4115 km SSW of Hihifo, Tonga · 1840 days ago · 163 km deep · 45 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000ft10. Read Wed, Sep 30, 2026, 6:15 AM UTC.