M4.6 earthquake 69 km WSW of Neiafu, Tonga
A magnitude 4.6 earthquake struck 69 km WSW of Neiafu, Tonga on Mon, Aug 27, 2018, 4:59 PM GMT+13 (03:59 UTC), 109 km (68 mi) below the surface.
A larger quake followed: M5.1 150 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
- 2018-08-27 03:59:51 UTC
- Depth
- 109.2 km (67.9 mi), intermediate-depth
- Epicenter
- 18.774° S, 174.626° 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 8.8 km horizontally, 14.8 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- From location
- Station coverage gap
- 122°
- Stations used
- 25
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 4 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.1154 km W of Neiafu, Tonga · 2938 days ago · 149 km deep · 86 km away
- 5.1150 km W of Neiafu, Tonga · 2914 days ago · 232 km deep · 88 km away
- 4.5137 km WNW of Neiafu, Tonga · 2912 days ago · 264 km deep · 100 km away
- 4.9144 km NW of Pangai, Tonga · 2906 days ago · 10 km deep · 88 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000h8qd. Read Fri, Oct 2, 2026, 4:37 AM UTC.