Tonga earthquakes

M4.2 earthquake 124 km S of Hihifo, Tonga

A magnitude 4.2 earthquake struck 124 km S of Hihifo, Tonga on Sat, Nov 6, 2021, 11:38 PM GMT-12 (11:38 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M5.6 124 km SSE 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
4.2 (mb), light
Local time
UTC
2021-11-07 11:38:23 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
17.073° S, 173.688° 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 6.9 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
126°
Stations used
23

Nearby

Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 4.4137 km N of Neiafu, Tonga · 1780 days ago · 76 km deep · 47 km away
  2. 4.6114 km NE of Neiafu, Tonga · 1764 days ago · 10 km deep · 98 km away
  3. 4.6120 km SSW of Hihifo, Tonga · 1752 days ago · 89 km deep · 51 km away
  4. 4.695 km SE of Hihifo, Tonga · 1746 days ago · 10 km deep · 76 km away
  5. 5.6124 km SSE of Hihifo, Tonga · 1740 days ago · 43 km deep · 21 km away · felt by 5
  6. 4.6126 km SSW of Hihifo, Tonga · 1733 days ago · 61 km deep · 56 km away

Before

  1. 4.636 km SSE of Hihifo, Tonga · 1789 days ago · 73 km deep · 93 km away
  2. 4.4131 km SSW of Hihifo, Tonga · 1789 days ago · 219 km deep · 73 km away
  3. 4.774 km SSE of Hihifo, Tonga · 1793 days ago · 10 km deep · 53 km away
  4. 4.1138 km NNE of Neiafu, Tonga · 1796 days ago · 35 km deep · 53 km away
  5. 4.5148 km NE of Neiafu, Tonga · 1801 days ago · 10 km deep · 99 km away
  6. 5.0121 km S of Hihifo, Tonga · 1803 days ago · 75 km deep · 30 km away
  7. 4.5108 km SSW of Hihifo, Tonga · 1813 days ago · 156 km deep · 55 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000ft95. Read Wed, Sep 30, 2026, 6:58 AM UTC.