M4.6 earthquake 82 km NW of Neiafu, Tonga
A magnitude 4.6 earthquake struck 82 km NW of Neiafu, Tonga on Tue, Aug 7, 2018, 2:04 PM GMT+13 (01:04 UTC), 166 km (103 mi) below the surface.
A larger quake followed: M4.9 102 km W 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
- 4.6 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-08-07 01:04:03 UTC
- Depth
- 166.2 km (103.2 mi), intermediate-depth
- Epicenter
- 18.156° S, 174.574° 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 10.9 km horizontally, 8.2 km in depth
- Magnitude uncertainty
- ±0.08
- Depth from
- From location
- Station coverage gap
- 78°
- Stations used
- 49
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 3 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.9102 km W of Neiafu, Tonga · 2975 days ago · 134 km deep · 77 km away · felt by 1
- 4.669 km WSW of Neiafu, Tonga · 2958 days ago · 109 km deep · 69 km away
- 4.3147 km NNW of Neiafu, Tonga · 2927 days ago · 146 km deep · 95 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000g6du. Read Fri, Oct 2, 2026, 7:35 AM UTC.