Tonga earthquakes

M4.1 earthquake 294 km W of Houma, Tonga

A magnitude 4.1 earthquake struck 294 km W of Houma, Tonga on Mon, Aug 7, 2023, 8:31 PM GMT+13 (07:31 UTC), 573 km (356 mi) below the surface.

A larger quake followed: M4.9 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, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-08-07 07:31:56 UTC
Depth
573.1 km (356.1 mi), deep
Epicenter
20.994° S, 178.129° 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 15.0 km horizontally, 9.3 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
84°
Stations used
22

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 32 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.2Fiji region · 1150 days ago · 594 km deep · 87 km away
  2. 4.4296 km WNW of Houma, Tonga · 1149 days ago · 536 km deep · 91 km away
  3. 4.3268 km WNW of Houma, Tonga · 1147 days ago · 529 km deep · 90 km away
  4. 4.5265 km WNW of Houma, Tonga · 1143 days ago · 493 km deep · 89 km away
  5. 4.5270 km WNW of Houma, Tonga · 1141 days ago · 533 km deep · 51 km away
  6. 4.3241 km WNW of Houma, Tonga · 1138 days ago · 504 km deep · 87 km away
  7. 4.2Fiji region · 1138 days ago · 546 km deep · 30 km away
  8. 4.9Fiji region · 1137 days ago · 412 km deep · 54 km away
  9. 4.4Fiji region · 1137 days ago · 602 km deep · 78 km away
  10. 4.3Fiji region · 1135 days ago · 541 km deep · 51 km away
  11. 4.2Fiji region · 1131 days ago · 601 km deep · 99 km away
  12. 4.5259 km WNW of Houma, Tonga · 1131 days ago · 529 km deep · 80 km away
  13. 4.0283 km WNW of Houma, Tonga · 1131 days ago · 516 km deep · 83 km away
  14. 4.0Fiji region · 1131 days ago · 597 km deep · 66 km away
  15. 4.1Fiji region · 1123 days ago · 602 km deep · 63 km away
  16. 4.3Fiji region · 1123 days ago · 568 km deep · 52 km away
  17. 4.4Fiji region · 1122 days ago · 527 km deep · 80 km away
  18. 4.3Fiji region · 1121 days ago · 561 km deep · 62 km away
  19. 4.5286 km WNW of Houma, Tonga · 1120 days ago · 494 km deep · 95 km away
  20. 4.2Fiji region · 1120 days ago · 525 km deep · 51 km away
  21. 4.5Fiji region · 1119 days ago · 561 km deep · 63 km away
  22. 4.1Fiji region · 1117 days ago · 524 km deep · 49 km away
  23. 4.5Fiji region · 1115 days ago · 511 km deep · 56 km away
  24. 4.0244 km W of Houma, Tonga · 1115 days ago · 389 km deep · 57 km away
  25. 4.5Fiji region · 1109 days ago · 542 km deep · 39 km away
  26. 4.3297 km W of Houma, Tonga · 1100 days ago · 623 km deep · 23 km away
  27. 4.3Fiji region · 1098 days ago · 538 km deep · 80 km away
  28. 4.3298 km W of Houma, Tonga · 1098 days ago · 380 km deep · 49 km away
  29. 4.3273 km WNW of Houma, Tonga · 1097 days ago · 507 km deep · 89 km away
  30. 4.6Fiji region · 1097 days ago · 598 km deep · 65 km away
  31. 4.1Fiji region · 1095 days ago · 629 km deep · 73 km away
  32. 4.7250 km WNW of Houma, Tonga · 1094 days ago · 503 km deep · 75 km away

Before

  1. 4.4Fiji region · 1153 days ago · 416 km deep · 75 km away
  2. 4.5Fiji region · 1158 days ago · 513 km deep · 29 km away
  3. 4.4Fiji region · 1160 days ago · 394 km deep · 93 km away
  4. 4.1284 km WNW of Houma, Tonga · 1182 days ago · 514 km deep · 60 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000knmk. Read Fri, Oct 2, 2026, 8:50 PM UTC.