M4.2 earthquake 121 km SSW of Hihifo, Tonga
A magnitude 4.2 earthquake struck 121 km SSW of Hihifo, Tonga on Sun, Jul 16, 2023, 8:41 PM GMT-12 (08:41 UTC), 136 km (85 mi) below the surface.
A larger quake followed: M4.6 102 km SSE of Hihifo, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2023-07-17 08:41:25 UTC
- Depth
- 136.2 km (84.6 mi), intermediate-depth
- Epicenter
- 16.977° S, 174.218° 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 8.4 km horizontally, 12.1 km in depth
- Magnitude uncertainty
- ±0.22
- Depth from
- From location
- Station coverage gap
- 139°
- Stations used
- 12
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 7 in the 30 days before it.
After
- 4.3145 km SSW of Hihifo, Tonga · 1172 days ago · 128 km deep · 25 km away
- 4.5183 km NW of Neiafu, Tonga · 1167 days ago · 276 km deep · 93 km away
- 4.6102 km SSE of Hihifo, Tonga · 1161 days ago · 50 km deep · 99 km away
- 4.4126 km S of Hihifo, Tonga · 1149 days ago · 108 km deep · 28 km away
- 4.3151 km SSE of Hihifo, Tonga · 1147 days ago · 24 km deep · 95 km away
- 4.1171 km SW of Hihifo, Tonga · 1145 days ago · 250 km deep · 63 km away
- 4.5120 km S of Hihifo, Tonga · 1142 days ago · 140 km deep · 23 km away
- 4.680 km SSW of Hihifo, Tonga · 1118 days ago · 136 km deep · 43 km away
Before
- 4.5153 km SW of Hihifo, Tonga · 1174 days ago · 205 km deep · 69 km away
- 4.1127 km SSW of Hihifo, Tonga · 1175 days ago · 174 km deep · 25 km away
- 4.237 km SW of Hihifo, Tonga · 1178 days ago · 110 km deep · 88 km away
- 4.4164 km NW of Neiafu, Tonga · 1188 days ago · 222 km deep · 97 km away
- 4.6105 km SSE of Hihifo, Tonga · 1189 days ago · 82 km deep · 88 km away
- 4.352 km SSW of Hihifo, Tonga · 1203 days ago · 62 km deep · 69 km away
- 4.2133 km SSW of Hihifo, Tonga · 1203 days ago · 96 km deep · 13 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000ki85. Read Fri, Oct 2, 2026, 7:26 PM UTC.