Tonga earthquakes

M3.8 earthquake 257 km NW of Houma, Tonga

A magnitude 3.8 earthquake struck 257 km NW of Houma, Tonga on Mon, Jul 28, 2025, 9:17 AM GMT+13 (20:17 UTC), 534 km (332 mi) below the surface.

A larger quake followed: M4.7 257 km WNW of Houma, 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
3.8 (mb, body-wave), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2025-07-27 20:17:12 UTC
Depth
533.9 km (331.8 mi), deep
Epicenter
19.822° S, 177.319° 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 19.2 km horizontally, 14.3 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
126°
Stations used
18

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 4.6215 km NW of Houma, Tonga · 431 days ago · 308 km deep · 93 km away
  2. 4.2247 km WNW of Houma, Tonga · 415 days ago · 528 km deep · 81 km away
  3. 4.4263 km WNW of Houma, Tonga · 409 days ago · 510 km deep · 52 km away
  4. 4.5271 km WNW of Houma, Tonga · 406 days ago · 505 km deep · 62 km away
  5. 4.2288 km WNW of Houma, Tonga · 403 days ago · 562 km deep · 70 km away
  6. 4.4265 km WNW of Houma, Tonga · 400 days ago · 493 km deep · 68 km away
  7. 4.4267 km WNW of Houma, Tonga · 398 days ago · 508 km deep · 67 km away
  8. 4.3Fiji region · 397 days ago · 420 km deep · 68 km away
  9. 4.7257 km WNW of Houma, Tonga · 396 days ago · 470 km deep · 68 km away
  10. 4.4297 km WNW of Houma, Tonga · 395 days ago · 430 km deep · 60 km away
  11. 4.7274 km WNW of Houma, Tonga · 395 days ago · 532 km deep · 93 km away
  12. 4.4277 km WNW of Houma, Tonga · 394 days ago · 550 km deep · 89 km away
  13. 4.4Fiji region · 392 days ago · 576 km deep · 91 km away
  14. 4.2259 km WNW of Houma, Tonga · 379 days ago · 534 km deep · 91 km away
  15. 4.0Fiji region · 377 days ago · 569 km deep · 92 km away
  16. 4.3285 km WNW of Houma, Tonga · 376 days ago · 521 km deep · 88 km away
  17. 4.1Fiji region · 373 days ago · 505 km deep · 96 km away

Before

  1. 4.5Fiji region · 442 days ago · 597 km deep · 71 km away
  2. 4.4295 km NW of Houma, Tonga · 445 days ago · 336 km deep · 75 km away
  3. 4.4Fiji region · 450 days ago · 550 km deep · 63 km away
  4. 4.3Fiji region · 455 days ago · 575 km deep · 62 km away
  5. 4.1294 km WNW of Houma, Tonga · 456 days ago · 576 km deep · 58 km away
  6. 4.3Fiji region · 462 days ago · 600 km deep · 85 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000qz5p. Read Sat, Oct 3, 2026, 1:08 PM UTC.