M4.1 earthquake 171 km SW of Hihifo, Tonga
A magnitude 4.1 earthquake struck 171 km SW of Hihifo, Tonga on Sun, Aug 13, 2023, 8:23 PM GMT-12 (08:23 UTC), 250 km (155 mi) below the surface.
A larger quake followed: M4.8 90 km NNW of Neiafu, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.1 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2023-08-14 08:23:19 UTC
- Depth
- 249.9 km (155.3 mi), intermediate-depth
- Epicenter
- 17.189° S, 174.768° 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 12.3 km horizontally, 7.9 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- From location
- Station coverage gap
- 96°
- Stations used
- 41
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 10 in the 30 days before it.
After
- 4.5120 km S of Hihifo, Tonga · 1144 days ago · 140 km deep · 83 km away
- 4.890 km NNW of Neiafu, Tonga · 1143 days ago · 64 km deep · 92 km away
- 4.2169 km NW of Neiafu, Tonga · 1120 days ago · 260 km deep · 52 km away
- 4.680 km SSW of Hihifo, Tonga · 1119 days ago · 136 km deep · 94 km away
- 4.1134 km S of Hihifo, Tonga · 1112 days ago · 141 km deep · 82 km away
- 4.3137 km SSW of Hihifo, Tonga · 1105 days ago · 197 km deep · 38 km away
- 4.3151 km NW of Neiafu, Tonga · 1101 days ago · 220 km deep · 64 km away
Before
- 4.5186 km NW of Neiafu, Tonga · 1149 days ago · 275 km deep · 69 km away
- 4.4126 km S of Hihifo, Tonga · 1151 days ago · 108 km deep · 84 km away
- 4.3156 km NW of Neiafu, Tonga · 1154 days ago · 229 km deep · 69 km away
- 4.4202 km WSW of Hihifo, Tonga · 1159 days ago · 238 km deep · 92 km away
- 4.5183 km NW of Neiafu, Tonga · 1169 days ago · 276 km deep · 30 km away
- 4.1162 km NW of Neiafu, Tonga · 1172 days ago · 221 km deep · 57 km away
- 4.3145 km SSW of Hihifo, Tonga · 1173 days ago · 128 km deep · 52 km away
- 4.2121 km SSW of Hihifo, Tonga · 1175 days ago · 136 km deep · 63 km away
- 4.5153 km SW of Hihifo, Tonga · 1175 days ago · 205 km deep · 35 km away
- 4.1127 km SSW of Hihifo, Tonga · 1177 days ago · 174 km deep · 45 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000kqf4. Read Sun, Oct 4, 2026, 7:56 AM UTC.