Tonga earthquakes

M4.3 earthquake 262 km WNW of Houma, Tonga

A magnitude 4.3 earthquake struck 262 km WNW of Houma, Tonga on Mon, Aug 21, 2023, 10:57 AM GMT+13 (21:57 UTC), 376 km (234 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
4.3 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-08-20 21:57:46 UTC
Depth
376.2 km (233.8 mi), deep
Epicenter
19.881° S, 177.419° W
Region
Tonga
Felt reports
1
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

1 person reported to the USGS what they felt.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 11.0 km horizontally, 6.8 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
57°
Stations used
52

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 28 in the 60 days after this one and 12 in the 30 days before it.

After

  1. 4.3241 km WNW of Houma, Tonga · 1138 days ago · 504 km deep · 67 km away
  2. 4.5259 km WNW of Houma, Tonga · 1131 days ago · 529 km deep · 66 km away
  3. 4.0283 km WNW of Houma, Tonga · 1130 days ago · 516 km deep · 65 km away
  4. 4.0289 km WNW of Houma, Tonga · 1128 days ago · 540 km deep · 28 km away
  5. 4.3Fiji region · 1125 days ago · 598 km deep · 86 km away
  6. 4.3Fiji region · 1125 days ago · 532 km deep · 56 km away
  7. 4.2Fiji region · 1123 days ago · 531 km deep · 67 km away
  8. 4.1Fiji region · 1122 days ago · 557 km deep · 77 km away
  9. 4.4Fiji region · 1121 days ago · 527 km deep · 87 km away
  10. 4.1287 km NW of Houma, Tonga · 1120 days ago · 552 km deep · 31 km away
  11. 4.5286 km WNW of Houma, Tonga · 1120 days ago · 494 km deep · 55 km away
  12. 4.0299 km WNW of Houma, Tonga · 1118 days ago · 559 km deep · 55 km away
  13. 4.0284 km WNW of Houma, Tonga · 1112 days ago · 509 km deep · 34 km away
  14. 4.4280 km WNW of Houma, Tonga · 1111 days ago · 496 km deep · 29 km away
  15. 4.4Fiji region · 1110 days ago · 567 km deep · 61 km away
  16. 4.1Fiji region · 1109 days ago · 555 km deep · 78 km away
  17. 4.5257 km WNW of Houma, Tonga · 1104 days ago · 527 km deep · 19 km away
  18. 4.3Fiji region · 1103 days ago · 598 km deep · 66 km away
  19. 4.4Fiji region · 1100 days ago · 553 km deep · 77 km away
  20. 4.9Fiji region · 1099 days ago · 596 km deep · 84 km away
  21. 4.3273 km WNW of Houma, Tonga · 1096 days ago · 507 km deep · 56 km away
  22. 4.0Fiji region · 1095 days ago · 571 km deep · 82 km away
  23. 4.5274 km NW of Houma, Tonga · 1095 days ago · 312 km deep · 83 km away
  24. 4.7250 km WNW of Houma, Tonga · 1094 days ago · 503 km deep · 75 km away
  25. 4.2297 km WNW of Houma, Tonga · 1091 days ago · 564 km deep · 83 km away
  26. 4.7261 km WNW of Houma, Tonga · 1089 days ago · 500 km deep · 44 km away
  27. 4.3256 km WNW of Houma, Tonga · 1086 days ago · 541 km deep · 23 km away
  28. 4.2Fiji region · 1082 days ago · 574 km deep · 83 km away

Before

  1. 4.5270 km WNW of Houma, Tonga · 1140 days ago · 533 km deep · 93 km away
  2. 4.2Fiji region · 1141 days ago · 596 km deep · 97 km away
  3. 4.5265 km WNW of Houma, Tonga · 1143 days ago · 493 km deep · 56 km away
  4. 4.0Fiji region · 1143 days ago · 578 km deep · 89 km away
  5. 4.0283 km WNW of Houma, Tonga · 1144 days ago · 502 km deep · 41 km away
  6. 4.2282 km WNW of Houma, Tonga · 1146 days ago · 528 km deep · 41 km away
  7. 4.3268 km WNW of Houma, Tonga · 1147 days ago · 529 km deep · 54 km away
  8. 4.2Fiji region · 1147 days ago · 539 km deep · 73 km away
  9. 4.4296 km WNW of Houma, Tonga · 1148 days ago · 536 km deep · 65 km away
  10. 4.1264 km WNW of Houma, Tonga · 1150 days ago · 557 km deep · 30 km away
  11. 4.1Fiji region · 1153 days ago · 420 km deep · 38 km away
  12. 4.4Fiji region · 1159 days ago · 394 km deep · 53 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000kpqm. Read Fri, Oct 2, 2026, 6:33 AM UTC.