M4.8 earthquake 158 km SSE of ‘Ohonua, Tonga
A magnitude 4.8 earthquake struck 158 km SSE of ‘Ohonua, Tonga on Mon, Aug 23, 2021, 5:34 PM GMT+13 (04:34 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.9 83 km SSE of ‘Ohonua, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.8 (mb), light
- Local time
- UTC
- 2021-08-23 04:34:36 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 22.629° S, 174.292° 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 7.8 km horizontally, 1.7 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- Operator assigned
- Station coverage gap
- 99°
- Stations used
- 29
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.8 and up: 6 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.6157 km SSE of ‘Ohonua, Tonga · 1857 days ago · 10 km deep · 2 km away
- 5.983 km SSE of ‘Ohonua, Tonga · 1851 days ago · 10 km deep · 75 km away · felt by 3
- 4.3197 km SSE of ‘Ohonua, Tonga · 1850 days ago · 10 km deep · 51 km away
- 4.7171 km SSE of ‘Ohonua, Tonga · 1841 days ago · 10 km deep · 14 km away
- 4.280 km S of ‘Ohonua, Tonga · 1838 days ago · 35 km deep · 98 km away
- 4.3146 km SSE of ‘Ohonua, Tonga · 1826 days ago · 10 km deep · 18 km away
Before
- 5.0113 km SSE of ‘Ohonua, Tonga · 1868 days ago · 10 km deep · 49 km away
- 4.4228 km S of ‘Ohonua, Tonga · 1869 days ago · 10 km deep · 95 km away
- 4.5154 km SE of ‘Ohonua, Tonga · 1872 days ago · 10 km deep · 62 km away
- 5.6127 km SSE of ‘Ohonua, Tonga · 1874 days ago · 10 km deep · 35 km away
- 4.6157 km SSE of ‘Ohonua, Tonga · 1879 days ago · 10 km deep · 13 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000f9xs. Read Wed, Sep 30, 2026, 10:18 PM UTC.