M4.7 earthquake 232 km SE of Hihifo, Tonga
A magnitude 4.7 earthquake struck 232 km SE of Hihifo, Tonga on Tue, Aug 31, 2021, 3:41 PM GMT+13 (02:41 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.8 174 km NE 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
- 4.7 (mb), light
- Local time
- UTC
- 2021-08-31 02:41:50 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 17.398° S, 172.217° 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 11.2 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.13
- Depth from
- Operator assigned
- Station coverage gap
- 144°
- Stations used
- 24
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.8174 km NE of Neiafu, Tonga · 1832 days ago · 10 km deep · 85 km away
- 4.8161 km SE of Hihifo, Tonga · 1805 days ago · 10 km deep · 71 km away · felt by 1
- 4.5148 km NE of Neiafu, Tonga · 1801 days ago · 10 km deep · 90 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000f9ch. Read Wed, Sep 30, 2026, 5:31 AM UTC.