M4.7 earthquake 143 km ESE of Neiafu, Tonga
A magnitude 4.7 earthquake struck 143 km ESE of Neiafu, Tonga on Sun, Feb 21, 2021, 11:17 PM GMT+13 (10:17 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.8 95 km ENE of Pangai, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb), light
- Local time
- UTC
- 2021-02-21 10:17:18 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 19.248° S, 172.777° 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 4.4 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.13
- Depth from
- Operator assigned
- Station coverage gap
- 101°
- Stations used
- 23
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 4 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.5139 km E of Neiafu, Tonga · 2033 days ago · 10 km deep · 61 km away
- 4.6132 km E of Neiafu, Tonga · 2030 days ago · 10 km deep · 53 km away
- 4.895 km ENE of Pangai, Tonga · 2017 days ago · 10 km deep · 81 km away
- 4.4179 km SE of Neiafu, Tonga · 2000 days ago · 10 km deep · 43 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000ddmm. Read Tue, Sep 29, 2026, 6:13 PM UTC.