M4.6 earthquake 33 km ENE of Neiafu, Tonga
A magnitude 4.6 earthquake struck 33 km ENE of Neiafu, Tonga on Sat, Sep 11, 2021, 8:40 PM GMT+13 (07:40 UTC), 32 km (20 mi) below the surface.
A larger quake followed: M5.4 85 km SE 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), light
- Local time
- UTC
- 2021-09-11 07:40:49 UTC
- Depth
- 31.8 km (19.8 mi), shallow
- Epicenter
- 18.498° S, 173.712° 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 15.5 km horizontally, 6.7 km in depth
- Magnitude uncertainty
- ±0.13
- Depth from
- From location
- Station coverage gap
- 138°
- Stations used
- 27
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 6 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.293 km SE of Neiafu, Tonga · 1844 days ago · 10 km deep · 93 km away
- 4.356 km W of Neiafu, Tonga · 1830 days ago · 91 km deep · 86 km away
- 4.940 km NNW of Neiafu, Tonga · 1826 days ago · 80 km deep · 52 km away
- 4.533 km NE of Neiafu, Tonga · 1791 days ago · 44 km deep · 8 km away
- 5.485 km SE of Neiafu, Tonga · 1788 days ago · 10 km deep · 89 km away
- 4.285 km NNW of Neiafu, Tonga · 1787 days ago · 67 km deep · 89 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000fbvp. Read Wed, Sep 30, 2026, 9:38 AM UTC.