Tonga earthquakes

M4.2 earthquake 243 km NW of Haveluloto, Tonga

A magnitude 4.2 earthquake struck 243 km NW of Haveluloto, Tonga on Sun, Mar 21, 2021, 6:04 AM GMT+13 (17:04 UTC), 388 km (241 mi) below the surface.

A larger quake followed: M5.1 270 km WNW of Haveluloto, 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
4.2 (mb), light
Local time
UTC
2021-03-20 17:04:46 UTC
Depth
388.1 km (241.1 mi), deep
Epicenter
19.906° S, 177.133° 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 9.3 km horizontally, 8.5 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
135°
Stations used
26

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 20 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 4.5185 km NW of Nuku‘alofa, Tonga · 2018 days ago · 236 km deep · 73 km away
  2. 4.5Fiji region · 2017 days ago · 549 km deep · 90 km away
  3. 4.1289 km WNW of Haveluloto, Tonga · 2016 days ago · 537 km deep · 88 km away
  4. 4.5270 km WNW of Haveluloto, Tonga · 2014 days ago · 398 km deep · 35 km away
  5. 4.4193 km WNW of Haveluloto, Tonga · 2007 days ago · 505 km deep · 68 km away
  6. 4.2Fiji region · 2007 days ago · 568 km deep · 96 km away
  7. 4.1Fiji region · 2004 days ago · 275 km deep · 9 km away
  8. 4.3Fiji region · 2003 days ago · 572 km deep · 71 km away
  9. 4.1Fiji region · 2002 days ago · 592 km deep · 88 km away
  10. 4.4Fiji region · 1992 days ago · 555 km deep · 90 km away
  11. 4.2285 km WNW of Haveluloto, Tonga · 1988 days ago · 510 km deep · 81 km away
  12. 4.5Fiji region · 1986 days ago · 568 km deep · 66 km away
  13. 5.1270 km WNW of Haveluloto, Tonga · 1985 days ago · 495 km deep · 83 km away
  14. 4.1Fiji region · 1982 days ago · 526 km deep · 98 km away
  15. 4.4287 km WNW of Haveluloto, Tonga · 1982 days ago · 540 km deep · 50 km away
  16. 4.5266 km WNW of Haveluloto, Tonga · 1981 days ago · 518 km deep · 69 km away
  17. 4.4269 km WNW of Haveluloto, Tonga · 1976 days ago · 484 km deep · 99 km away
  18. 4.2247 km NW of Haveluloto, Tonga · 1964 days ago · 341 km deep · 5 km away
  19. 4.1Fiji region · 1961 days ago · 561 km deep · 81 km away
  20. 4.2231 km WNW of Haveluloto, Tonga · 1960 days ago · 514 km deep · 52 km away

Before

  1. 4.6292 km WNW of Haveluloto, Tonga · 2029 days ago · 553 km deep · 58 km away
  2. 5.9273 km WNW of Haveluloto, Tonga · 2029 days ago · 488 km deep · 58 km away
  3. 4.2283 km WNW of Haveluloto, Tonga · 2031 days ago · 529 km deep · 73 km away
  4. 4.2299 km WNW of Haveluloto, Tonga · 2037 days ago · 530 km deep · 58 km away
  5. 4.4294 km WNW of Haveluloto, Tonga · 2047 days ago · 563 km deep · 54 km away
  6. 4.6Fiji region · 2048 days ago · 461 km deep · 66 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000dwt9. Read Tue, Sep 29, 2026, 2:16 PM UTC.