M4.5 earthquake 161 km W of Neiafu, Tonga
A magnitude 4.5 earthquake struck 161 km W of Neiafu, Tonga on Wed, Aug 8, 2018, 9:10 AM GMT+13 (20:10 UTC), 273 km (170 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
- 4.5 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-08-07 20:10:52 UTC
- Depth
- 273.3 km (169.8 mi), intermediate-depth
- Epicenter
- 18.809° S, 175.507° 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 14.7 km horizontally, 8.4 km in depth
- Magnitude uncertainty
- ±0.11
- Depth from
- From location
- Station coverage gap
- 116°
- Stations used
- 27
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 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 · 59 km away · felt by 1
- 4.5148 km WNW of Pangai, Tonga · 2963 days ago · 208 km deep · 75 km away
- 4.669 km WSW of Neiafu, Tonga · 2958 days ago · 109 km deep · 93 km away
- 4.4100 km WNW of Pangai, Tonga · 2944 days ago · 207 km deep · 83 km away
- 4.1154 km W of Neiafu, Tonga · 2938 days ago · 149 km deep · 11 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000g6eb. Read Fri, Oct 2, 2026, 1:37 AM UTC.