Tonga earthquakes

M4.1 earthquake 162 km NW of Neiafu, Tonga

A magnitude 4.1 earthquake struck 162 km NW of Neiafu, Tonga on Thu, Jul 20, 2023, 1:21 PM GMT+13 (00:21 UTC), 221 km (137 mi) below the surface.

A larger quake followed: M4.8 90 km NNW of Neiafu, 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
4.1 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-07-20 00:21:02 UTC
Depth
221.0 km (137.3 mi), intermediate-depth
Epicenter
17.616° S, 175.071° 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 11.7 km horizontally, 8.2 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
52°
Stations used
25

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 4.479 km WNW of Neiafu, Tonga · 1171 days ago · 131 km deep · 93 km away
  2. 4.5183 km NW of Neiafu, Tonga · 1169 days ago · 276 km deep · 34 km away
  3. 4.3156 km NW of Neiafu, Tonga · 1154 days ago · 229 km deep · 12 km away
  4. 4.5186 km NW of Neiafu, Tonga · 1149 days ago · 275 km deep · 27 km away
  5. 4.1171 km SW of Hihifo, Tonga · 1147 days ago · 250 km deep · 57 km away
  6. 4.890 km NNW of Neiafu, Tonga · 1143 days ago · 64 km deep · 85 km away
  7. 4.2169 km NW of Neiafu, Tonga · 1120 days ago · 260 km deep · 9 km away
  8. 4.3136 km WNW of Neiafu, Tonga · 1117 days ago · 216 km deep · 89 km away

Before

  1. 4.7141 km WNW of Neiafu, Tonga · 1172 days ago · 214 km deep · 61 km away
  2. 4.3145 km SSW of Hihifo, Tonga · 1173 days ago · 128 km deep · 97 km away
  3. 4.5153 km SW of Hihifo, Tonga · 1175 days ago · 205 km deep · 84 km away
  4. 4.3159 km NW of Neiafu, Tonga · 1181 days ago · 223 km deep · 6 km away
  5. 4.4164 km NW of Neiafu, Tonga · 1189 days ago · 222 km deep · 18 km away
  6. 6.9132 km NW of Neiafu, Tonga · 1190 days ago · 229 km deep · 32 km away · felt by 21 · tsunami flag

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000kw5q. Read Sun, Oct 4, 2026, 7:56 AM UTC.