M4.5 earthquake 221 km SE of Hihifo, Tonga
A magnitude 4.5 earthquake struck 221 km SE of Hihifo, Tonga on Sun, May 23, 2021, 11:32 PM GMT+13 (10:32 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.5 157 km SE of Hihifo, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb), light
- Local time
- UTC
- 2021-05-23 10:32:09 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 17.285° S, 172.249° 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 8.2 km horizontally, 1.8 km in depth
- Magnitude uncertainty
- ±0.20
- Depth from
- Operator assigned
- Station coverage gap
- 84°
- Stations used
- 13
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.4153 km ESE of Hihifo, Tonga · 1941 days ago · 10 km deep · 100 km away
- 5.5157 km SE of Hihifo, Tonga · 1931 days ago · 10 km deep · 65 km away
- 4.7181 km ESE of Hihifo, Tonga · 1931 days ago · 10 km deep · 49 km away
- 4.7139 km ESE of Hihifo, Tonga · 1927 days ago · 10 km deep · 91 km away
- 4.7172 km ESE of Hihifo, Tonga · 1906 days ago · 10 km deep · 56 km away
- 5.4152 km NE of Neiafu, Tonga · 1902 days ago · 10 km deep · 92 km away
- 5.1228 km SE of Hihifo, Tonga · 1898 days ago · 10 km deep · 7 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000efg8. Read Wed, Sep 30, 2026, 12:20 PM UTC.