M4.3 earthquake 166 km WNW of Neiafu, Tonga
A magnitude 4.3 earthquake struck 166 km WNW of Neiafu, Tonga on Tue, Mar 23, 2021, 12:33 AM GMT+13 (11:33 UTC), 277 km (172 mi) below the surface.
A larger quake followed: M4.6 119 km WNW 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
- 4.3 (mb), light
- Local time
- UTC
- 2021-03-22 11:33:46 UTC
- Depth
- 277.1 km (172.2 mi), intermediate-depth
- Epicenter
- 17.900° S, 175.343° 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 10.9 km horizontally, 8.6 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- From location
- Station coverage gap
- 139°
- Stations used
- 26
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.0249 km WNW of Neiafu, Tonga · 2009 days ago · 601 km deep · 92 km away
- 4.3181 km NW of Neiafu, Tonga · 1993 days ago · 282 km deep · 74 km away
- 4.6119 km WNW of Neiafu, Tonga · 1986 days ago · 154 km deep · 57 km away
- 4.3240 km WNW of Neiafu, Tonga · 1981 days ago · 605 km deep · 86 km away
- 4.1169 km NW of Neiafu, Tonga · 1965 days ago · 210 km deep · 24 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000dlkh. Read Tue, Sep 29, 2026, 2:16 PM UTC.