Tonga earthquakes

M4.1 earthquake 296 km W of Haveluloto, Tonga

A magnitude 4.1 earthquake struck 296 km W of Haveluloto, Tonga on Fri, Aug 20, 2021, 12:58 AM GMT+13 (11:58 UTC), 470 km (292 mi) below the surface.

A larger quake followed: M4.5 Fiji region. 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
4.1 (mb), light
Local time
UTC
2021-08-19 11:58:24 UTC
Depth
469.7 km (291.9 mi), deep
Epicenter
21.145° S, 178.071° 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 9.9 km horizontally, 21.4 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
228°, poorly surrounded by stations
Stations used
19

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 4.4Fiji region · 1866 days ago · 617 km deep · 86 km away
  2. 4.0276 km WNW of Haveluloto, Tonga · 1865 days ago · 540 km deep · 92 km away
  3. 4.4Fiji region · 1859 days ago · 550 km deep · 57 km away
  4. 4.1Fiji region · 1856 days ago · 584 km deep · 65 km away
  5. 4.2Fiji region · 1851 days ago · 598 km deep · 86 km away
  6. 4.3Fiji region · 1846 days ago · 577 km deep · 57 km away
  7. 4.3Fiji region · 1835 days ago · 603 km deep · 51 km away
  8. 4.5Fiji region · 1834 days ago · 611 km deep · 94 km away
  9. 4.4258 km WNW of Haveluloto, Tonga · 1832 days ago · 527 km deep · 83 km away
  10. 4.3Fiji region · 1832 days ago · 555 km deep · 34 km away
  11. 4.4Fiji region · 1827 days ago · 604 km deep · 54 km away
  12. 4.1Fiji region · 1814 days ago · 419 km deep · 47 km away
  13. 4.3Fiji region · 1810 days ago · 589 km deep · 84 km away
  14. 4.2Fiji region · 1809 days ago · 582 km deep · 55 km away

Before

  1. 4.6Fiji region · 1869 days ago · 577 km deep · 65 km away
  2. 4.2246 km W of Haveluloto, Tonga · 1870 days ago · 518 km deep · 51 km away
  3. 4.5223 km W of Haveluloto, Tonga · 1872 days ago · 385 km deep · 76 km away
  4. 4.2Fiji region · 1877 days ago · 602 km deep · 63 km away
  5. 4.2Fiji region · 1880 days ago · 550 km deep · 48 km away
  6. 4.2Fiji region · 1880 days ago · 534 km deep · 66 km away
  7. 4.8Fiji region · 1882 days ago · 530 km deep · 82 km away
  8. 4.2Fiji region · 1897 days ago · 550 km deep · 78 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000f8bk. Read Tue, Sep 29, 2026, 3:35 PM UTC.