Tonga earthquakes

M5.0 earthquake 169 km S of ‘Ohonua, Tonga

A magnitude 5.0 earthquake struck 169 km S of ‘Ohonua, Tonga on Thu, Oct 28, 2021, 7:03 PM GMT+13 (06:03 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.5 226 km S of ‘Ohonua, Tonga. This one was a foreshock.

Nuku‘alofa forecastMore in Tonga

Map

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

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The earthquake

Magnitude
5.0 (mb), moderate
Local time
UTC
2021-10-28 06:03:10 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
22.860° S, 174.928° 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 5.4 km horizontally, 1.8 km in depth
Magnitude uncertainty
±0.06
Depth from
Operator assigned
Station coverage gap
75°
Stations used
57

Nearest places

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

Nearby

Within 100 km, magnitude 2.0 and up: 14 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 4.5201 km SSE of ‘Ohonua, Tonga · 1796 days ago · 10 km deep · 87 km away
  2. 4.5137 km SSE of ‘Ohonua, Tonga · 1795 days ago · 10 km deep · 70 km away
  3. 4.7246 km SSE of ‘Ohonua, Tonga · 1794 days ago · 10 km deep · 87 km away
  4. 4.7148 km S of ‘Ohonua, Tonga · 1794 days ago · 10 km deep · 25 km away
  5. 4.8Tonga region · 1794 days ago · 10 km deep · 38 km away
  6. 4.2148 km SSE of ‘Ohonua, Tonga · 1787 days ago · 10 km deep · 44 km away
  7. 5.2152 km SSE of ‘Ohonua, Tonga · 1777 days ago · 10 km deep · 52 km away
  8. 4.8246 km S of ‘Ohonua, Tonga · 1773 days ago · 10 km deep · 79 km away
  9. 4.9229 km SSW of ‘Ohonua, Tonga · 1768 days ago · 35 km deep · 96 km away
  10. 5.5226 km S of ‘Ohonua, Tonga · 1762 days ago · 10 km deep · 58 km away
  11. 4.6229 km S of ‘Ohonua, Tonga · 1762 days ago · 10 km deep · 63 km away
  12. 4.9220 km S of ‘Ohonua, Tonga · 1762 days ago · 10 km deep · 65 km away
  13. 5.1256 km S of ‘Ohonua, Tonga · 1755 days ago · 10 km deep · 92 km away
  14. 4.9211 km S of ‘Ohonua, Tonga · 1739 days ago · 10 km deep · 52 km away

Before

  1. 4.5139 km SSE of ‘Ohonua, Tonga · 1801 days ago · 10 km deep · 50 km away
  2. 4.3146 km SSE of ‘Ohonua, Tonga · 1825 days ago · 10 km deep · 58 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000fpce. Read Wed, Sep 30, 2026, 3:47 AM UTC.