Tonga earthquakes

M4.2 earthquake 246 km W of Haveluloto, Tonga

A magnitude 4.2 earthquake struck 246 km W of Haveluloto, Tonga on Tue, Aug 17, 2021, 9:16 AM GMT+13 (20:16 UTC), 518 km (322 mi) below the surface.

A larger quake followed: M4.4 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
2021-08-16 20:16:52 UTC
Depth
517.8 km (321.7 mi), deep
Epicenter
21.109° S, 177.583° 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 11.6 km horizontally, 7.5 km in depth
Magnitude uncertainty
±0.19
Depth from
From location
Station coverage gap
170°
Stations used
23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.1296 km W of Haveluloto, Tonga · 1867 days ago · 470 km deep · 51 km away
  2. 4.0276 km WNW of Haveluloto, Tonga · 1864 days ago · 540 km deep · 83 km away
  3. 4.2257 km WNW of Haveluloto, Tonga · 1860 days ago · 401 km deep · 96 km away
  4. 4.4Fiji region · 1859 days ago · 550 km deep · 86 km away
  5. 4.3Fiji region · 1846 days ago · 577 km deep · 95 km away
  6. 4.1205 km WNW of Haveluloto, Tonga · 1845 days ago · 314 km deep · 60 km away
  7. 4.3Fiji region · 1835 days ago · 603 km deep · 90 km away
  8. 4.4258 km WNW of Haveluloto, Tonga · 1832 days ago · 527 km deep · 64 km away
  9. 4.3Fiji region · 1832 days ago · 555 km deep · 76 km away
  10. 4.2260 km WNW of Haveluloto, Tonga · 1831 days ago · 510 km deep · 88 km away
  11. 4.1Fiji region · 1814 days ago · 419 km deep · 76 km away

Before

  1. 4.5223 km W of Haveluloto, Tonga · 1872 days ago · 385 km deep · 33 km away
  2. 4.2Fiji region · 1880 days ago · 550 km deep · 78 km away
  3. 4.4238 km WNW of Haveluloto, Tonga · 1888 days ago · 478 km deep · 81 km away
  4. 4.3268 km WNW of Haveluloto, Tonga · 1896 days ago · 539 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000f4pu. Read Tue, Sep 29, 2026, 12:38 PM UTC.