M4.7 earthquake 61 km NW of Nuku‘alofa, Tonga
A magnitude 4.7 earthquake struck 61 km NW of Nuku‘alofa, Tonga on Sun, May 16, 2021, 7:28 PM GMT+13 (06:28 UTC), 167 km (104 mi) below the surface.
A larger quake followed: M5.2 101 km NNW of Nuku‘alofa, 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, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2021-05-16 06:28:11 UTC
- Depth
- 166.9 km (103.7 mi), intermediate-depth
- Epicenter
- 20.683° S, 175.536° 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 13.0 km horizontally, 7.5 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- From location
- Station coverage gap
- 85°
- Stations used
- 43
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 5.2101 km NNW of Nuku‘alofa, Tonga · 1950 days ago · 137 km deep · 45 km away
- 4.9156 km NW of Nuku‘alofa, Tonga · 1946 days ago · 131 km deep · 95 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000e3hr. Read Thu, Oct 1, 2026, 1:05 PM UTC.