M5.0 earthquake 113 km SSE of ‘Ohonua, Tonga
A magnitude 5.0 earthquake struck 113 km SSE of ‘Ohonua, Tonga on Fri, Aug 20, 2021, 9:45 AM GMT+13 (20:45 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
- 5.0 (mb), moderate
- Local time
- UTC
- 2021-08-19 20:45:33 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 22.310° S, 174.616° 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 5.6 km horizontally, 1.8 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- Operator assigned
- Station coverage gap
- 102°
- Stations used
- 53
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.0 and up: 7 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.8158 km SSE of ‘Ohonua, Tonga · 1865 days ago · 10 km deep · 49 km away
- 4.6157 km SSE of ‘Ohonua, Tonga · 1857 days ago · 10 km deep · 47 km away
- 5.983 km SSE of ‘Ohonua, Tonga · 1851 days ago · 10 km deep · 33 km away · felt by 3
- 4.3197 km SSE of ‘Ohonua, Tonga · 1851 days ago · 10 km deep · 85 km away
- 4.7171 km SSE of ‘Ohonua, Tonga · 1841 days ago · 10 km deep · 60 km away
- 4.280 km S of ‘Ohonua, Tonga · 1838 days ago · 35 km deep · 50 km away
- 4.3146 km SSE of ‘Ohonua, Tonga · 1826 days ago · 10 km deep · 34 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000f8if. Read Thu, Oct 1, 2026, 1:26 AM UTC.