Tonga earthquakes

M4.2 earthquake 89 km WNW of Hihifo, Tonga

A magnitude 4.2 earthquake struck 89 km WNW of Hihifo, Tonga on Sun, Jul 16, 2023, 7:46 AM GMT+13 (18:46 UTC), 138 km (86 mi) below the surface.

A larger quake followed: M4.5 Tonga. This one was a foreshock.

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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, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-07-15 18:46:00 UTC
Depth
137.8 km (85.6 mi), intermediate-depth
Epicenter
15.758° S, 174.602° 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 8.8 km horizontally, 3.5 km in depth
Magnitude uncertainty
±0.27
Depth from
From location
Station coverage gap
57°
Stations used
14

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 4.1Tonga · 1173 days ago · 164 km deep · 29 km away
  2. 4.5Tonga · 1172 days ago · 206 km deep · 31 km away
  3. 4.2118 km WNW of Hihifo, Tonga · 1159 days ago · 177 km deep · 45 km away
  4. 4.581 km NNW of Hihifo, Tonga · 1152 days ago · 138 km deep · 87 km away
  5. 4.5113 km WNW of Hihifo, Tonga · 1151 days ago · 192 km deep · 39 km away
  6. 4.488 km WNW of Hihifo, Tonga · 1128 days ago · 207 km deep · 20 km away
  7. 4.0159 km WNW of Hihifo, Tonga · 1118 days ago · 289 km deep · 77 km away

Before

  1. 4.4124 km NW of Hihifo, Tonga · 1176 days ago · 205 km deep · 74 km away
  2. 4.4101 km WNW of Hihifo, Tonga · 1177 days ago · 180 km deep · 29 km away
  3. 4.237 km SW of Hihifo, Tonga · 1178 days ago · 110 km deep · 79 km away
  4. 4.3106 km WNW of Hihifo, Tonga · 1179 days ago · 285 km deep · 19 km away
  5. 4.277 km N of Hihifo, Tonga · 1184 days ago · 35 km deep · 97 km away
  6. 4.259 km NNW of Hihifo, Tonga · 1188 days ago · 171 km deep · 61 km away
  7. 4.8103 km NNW of Hihifo, Tonga · 1195 days ago · 171 km deep · 76 km away
  8. 4.352 km SSW of Hihifo, Tonga · 1204 days ago · 62 km deep · 98 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000khf3. Read Sat, Oct 3, 2026, 11:18 AM UTC.