M4.7 earthquake 151 km ESE of ‘Ohonua, Tonga
A magnitude 4.7 earthquake struck 151 km ESE of ‘Ohonua, Tonga on Sun, Aug 29, 2021, 11:05 PM GMT+13 (10:05 UTC), 16 km (10 mi) below the surface.
A larger quake followed: M4.9 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
- 2021-08-29 10:05:34 UTC
- Depth
- 15.9 km (9.9 mi), shallow
- Epicenter
- 21.720° S, 173.547° 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 10.4 km horizontally, 4.8 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- From location
- Station coverage gap
- 87°
- Stations used
- 57
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 5 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.3155 km ESE of ‘Ohonua, Tonga · 1853 days ago · 10 km deep · 5 km away
- 4.9Tonga · 1836 days ago · 10 km deep · 73 km away
- 4.6121 km E of ‘Ohonua, Tonga · 1835 days ago · 10 km deep · 69 km away
- 4.893 km E of ‘Ohonua, Tonga · 1833 days ago · 10 km deep · 61 km away
- 4.6154 km ESE of ‘Ohonua, Tonga · 1817 days ago · 10 km deep · 26 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000f5ew. Read Wed, Sep 30, 2026, 9:26 PM UTC.