Tonga earthquakes

M4.2 earthquake 257 km WNW of Haveluloto, Tonga

A magnitude 4.2 earthquake struck 257 km WNW of Haveluloto, Tonga on Sun, Sep 19, 2021, 6:20 AM GMT+13 (17:20 UTC), 500 km (311 mi) below the surface.

A larger quake followed: M5.5 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
4.2 (mb), light
Local time
UTC
2021-09-18 17:20:45 UTC
Depth
500.4 km (310.9 mi), deep
Epicenter
20.060° S, 177.395° 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 15.1 km horizontally, 11.3 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
138°
Stations used
25

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 19 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 4.4258 km WNW of Haveluloto, Tonga · 1831 days ago · 527 km deep · 58 km away
  2. 4.2260 km WNW of Haveluloto, Tonga · 1830 days ago · 510 km deep · 33 km away
  3. 4.4291 km NW of Nuku‘alofa, Tonga · 1828 days ago · 574 km deep · 82 km away
  4. 4.3277 km WNW of Haveluloto, Tonga · 1827 days ago · 565 km deep · 27 km away
  5. 4.3280 km WNW of Haveluloto, Tonga · 1815 days ago · 372 km deep · 23 km away
  6. 4.5Fiji region · 1809 days ago · 395 km deep · 43 km away
  7. 4.3265 km WNW of Haveluloto, Tonga · 1806 days ago · 511 km deep · 68 km away
  8. 4.2Fiji region · 1806 days ago · 437 km deep · 80 km away
  9. 4.0277 km WNW of Haveluloto, Tonga · 1804 days ago · 533 km deep · 27 km away
  10. 4.0276 km WNW of Haveluloto, Tonga · 1795 days ago · 554 km deep · 19 km away
  11. 4.2253 km WNW of Haveluloto, Tonga · 1795 days ago · 505 km deep · 47 km away
  12. 5.5Fiji region · 1795 days ago · 381 km deep · 55 km away
  13. 4.1280 km WNW of Haveluloto, Tonga · 1788 days ago · 558 km deep · 29 km away
  14. 4.0Fiji region · 1787 days ago · 568 km deep · 89 km away
  15. 4.2Fiji region · 1783 days ago · 425 km deep · 63 km away
  16. 4.1285 km WNW of Haveluloto, Tonga · 1782 days ago · 532 km deep · 66 km away
  17. 4.9269 km WNW of Haveluloto, Tonga · 1781 days ago · 505 km deep · 69 km away
  18. 4.1Fiji region · 1779 days ago · 559 km deep · 88 km away
  19. 4.6230 km WNW of Haveluloto, Tonga · 1777 days ago · 10 km deep · 30 km away

Before

  1. 4.3Fiji region · 1838 days ago · 601 km deep · 99 km away
  2. 4.2Fiji region · 1840 days ago · 595 km deep · 77 km away
  3. 4.1205 km WNW of Haveluloto, Tonga · 1845 days ago · 314 km deep · 83 km away
  4. 4.1Fiji region · 1845 days ago · 558 km deep · 71 km away
  5. 4.1264 km WNW of Haveluloto, Tonga · 1846 days ago · 563 km deep · 8 km away
  6. 4.2279 km NW of Haveluloto, Tonga · 1850 days ago · 563 km deep · 49 km away
  7. 4.1Fiji region · 1854 days ago · 550 km deep · 63 km away
  8. 4.2257 km WNW of Haveluloto, Tonga · 1859 days ago · 401 km deep · 24 km away
  9. 4.0276 km WNW of Haveluloto, Tonga · 1864 days ago · 540 km deep · 50 km away
  10. 4.6Fiji region · 1865 days ago · 417 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000fds8. Read Mon, Sep 28, 2026, 9:10 PM UTC.