M4.6 earthquake 83 km ENE of Neiafu, Tonga
A magnitude 4.6 earthquake struck 83 km ENE of Neiafu, Tonga on Mon, Mar 22, 2021, 3:36 AM GMT+13 (14:36 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.1 96 km ENE 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
- 2021-03-21 14:36:17 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 18.360° S, 173.249° 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 12.2 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.22
- Depth from
- Operator assigned
- Station coverage gap
- 230°, poorly surrounded by stations
- Stations used
- 8
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 4 in the 30 days before it.
After
- 4.9130 km ENE of Neiafu, Tonga · 2008 days ago · 10 km deep · 46 km away
- 4.6140 km NE of Neiafu, Tonga · 1986 days ago · 10 km deep · 60 km away
- 4.857 km N of Neiafu, Tonga · 1982 days ago · 10 km deep · 78 km away
- 5.196 km ENE of Neiafu, Tonga · 1976 days ago · 10 km deep · 15 km away
- 4.5113 km NE of Neiafu, Tonga · 1971 days ago · 10 km deep · 60 km away
- 5.1103 km NNE of Neiafu, Tonga · 1969 days ago · 10 km deep · 86 km away · felt by 1
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000dxfh. Read Tue, Sep 29, 2026, 6:13 PM UTC.