M4.6 earthquake 138 km W of Neiafu, Tonga
A magnitude 4.6 earthquake struck 138 km W of Neiafu, Tonga on Mon, Aug 30, 2021, 3:43 PM GMT+13 (02:43 UTC), 176 km (110 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 2021-08-30 02:43:59 UTC
- Depth
- 176.4 km (109.6 mi), intermediate-depth
- Epicenter
- 18.424° S, 175.272° 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 15.1 km horizontally, 8.6 km in depth
- Magnitude uncertainty
- ±0.14
- Depth from
- From location
- Station coverage gap
- 143°
- Stations used
- 22
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 1 in the 30 days before it.
After
- 4.356 km W of Neiafu, Tonga · 1830 days ago · 91 km deep · 82 km away
- 4.4187 km WNW of Neiafu, Tonga · 1812 days ago · 267 km deep · 64 km away
- 4.488 km NW of Neiafu, Tonga · 1809 days ago · 131 km deep · 82 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000f995. Read Wed, Sep 30, 2026, 5:31 AM UTC.