M4.3 earthquake 218 km W of Hihifo, Tonga
A magnitude 4.3 earthquake struck 218 km W of Hihifo, Tonga on Mon, Aug 6, 2018, 7:56 PM GMT-12 (07:56 UTC), 372 km (231 mi) below the surface.
A larger quake followed: M4.9 Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-08-07 07:56:17 UTC
- Depth
- 372.3 km (231.3 mi), deep
- Epicenter
- 16.123° S, 175.827° 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 15.4 km horizontally, 10.3 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- From location
- Station coverage gap
- 119°
- Stations used
- 34
Nearby
Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.3212 km W of Hihifo, Tonga · 2978 days ago · 360 km deep · 7 km away
- 4.2219 km W of Hihifo, Tonga · 2957 days ago · 350 km deep · 7 km away
- 4.8253 km W of Hihifo, Tonga · 2955 days ago · 10 km deep · 39 km away
- 4.5150 km WNW of Hihifo, Tonga · 2941 days ago · 247 km deep · 90 km away
- 4.9Tonga · 2931 days ago · 10 km deep · 72 km away
- 4.4211 km W of Hihifo, Tonga · 2927 days ago · 340 km deep · 57 km away
- 4.0261 km W of Hihifo, Tonga · 2926 days ago · 391 km deep · 44 km away
- 4.3208 km W of Hihifo, Tonga · 2923 days ago · 339 km deep · 10 km away
- 4.3150 km WSW of Hihifo, Tonga · 2919 days ago · 332 km deep · 81 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000g6e2. Read Fri, Oct 2, 2026, 8:04 PM UTC.