M4.6 earthquake 123 km W of Pangai, Tonga
A magnitude 4.6 earthquake struck 123 km W of Pangai, Tonga on Thu, Aug 18, 2016, 2:06 AM GMT+13 (13:06 UTC), 231 km (144 mi) below the surface.
A larger quake followed: M4.7 126 km NW of Nuku‘alofa, 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
- 2016-08-17 13:06:35 UTC
- Depth
- 231.1 km (143.6 mi), intermediate-depth
- Epicenter
- 19.805° S, 175.536° 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 11.9 km horizontally, 7.1 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- From location
- Station coverage gap
- 99°
- Stations used
- 84
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 2 in the 30 days before it.
After
- 4.7126 km NW of Nuku‘alofa, Tonga · 3699 days ago · 196 km deep · 77 km away
- 4.5107 km NNW of Nuku‘alofa, Tonga · 3693 days ago · 183 km deep · 49 km away
- 4.3142 km WNW of Pangai, Tonga · 3680 days ago · 222 km deep · 53 km away
- 4.1208 km NW of Nuku‘alofa, Tonga · 3666 days ago · 231 km deep · 91 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us10006eet. Read Sun, Oct 4, 2026, 9:10 AM UTC.