Tonga earthquakes

M4.5 earthquake 162 km SW of Hihifo, Tonga

A magnitude 4.5 earthquake struck 162 km SW of Hihifo, Tonga on Mon, Oct 11, 2021, 4:49 AM GMT-12 (16:49 UTC), 197 km (123 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
4.5 (mb), light
Local time
UTC
2021-10-11 16:49:15 UTC
Depth
197.5 km (122.7 mi), intermediate-depth
Epicenter
17.144° S, 174.691° 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 6.8 km horizontally, 7.5 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
67°
Stations used
38

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.5108 km SSW of Hihifo, Tonga · 1813 days ago · 156 km deep · 64 km away
  2. 4.1168 km NNW of Neiafu, Tonga · 1804 days ago · 308 km deep · 24 km away
  3. 5.0121 km S of Hihifo, Tonga · 1803 days ago · 75 km deep · 78 km away
  4. 4.6125 km NNW of Neiafu, Tonga · 1794 days ago · 176 km deep · 58 km away
  5. 4.2144 km NW of Neiafu, Tonga · 1792 days ago · 262 km deep · 54 km away
  6. 4.4131 km SSW of Hihifo, Tonga · 1789 days ago · 219 km deep · 38 km away
  7. 4.285 km NNW of Neiafu, Tonga · 1787 days ago · 67 km deep · 98 km away
  8. 4.6138 km NW of Neiafu, Tonga · 1780 days ago · 227 km deep · 65 km away
  9. 4.4137 km N of Neiafu, Tonga · 1780 days ago · 76 km deep · 84 km away
  10. 4.2123 km WSW of Hihifo, Tonga · 1773 days ago · 204 km deep · 78 km away
  11. 4.0112 km SW of Hihifo, Tonga · 1769 days ago · 190 km deep · 55 km away
  12. 4.5103 km NNW of Neiafu, Tonga · 1760 days ago · 80 km deep · 80 km away

Before

  1. 4.3188 km NW of Neiafu, Tonga · 1816 days ago · 291 km deep · 60 km away
  2. 4.3142 km N of Neiafu, Tonga · 1821 days ago · 105 km deep · 80 km away
  3. 4.8117 km N of Neiafu, Tonga · 1821 days ago · 98 km deep · 82 km away
  4. 4.4115 km SSW of Hihifo, Tonga · 1840 days ago · 163 km deep · 70 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000fts2. Read Wed, Sep 30, 2026, 6:15 AM UTC.