M4.3 earthquake 146 km SSE of ‘Ohonua, Tonga
A magnitude 4.3 earthquake struck 146 km SSE of ‘Ohonua, Tonga on Fri, Oct 1, 2021, 8:48 AM GMT+13 (19:48 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.2 152 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
- 4.3 (mb), light
- Local time
- UTC
- 2021-09-30 19:48:35 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 22.573° S, 174.453° 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 11.3 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.19
- Depth from
- Operator assigned
- Station coverage gap
- 142°
- Stations used
- 15
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.5139 km SSE of ‘Ohonua, Tonga · 1802 days ago · 10 km deep · 14 km away
- 5.0169 km S of ‘Ohonua, Tonga · 1799 days ago · 10 km deep · 58 km away
- 4.5201 km SSE of ‘Ohonua, Tonga · 1797 days ago · 10 km deep · 58 km away
- 4.5137 km SSE of ‘Ohonua, Tonga · 1796 days ago · 10 km deep · 14 km away
- 4.7148 km S of ‘Ohonua, Tonga · 1795 days ago · 10 km deep · 37 km away
- 4.8Tonga region · 1795 days ago · 10 km deep · 79 km away
- 4.2148 km SSE of ‘Ohonua, Tonga · 1788 days ago · 10 km deep · 14 km away
- 5.2152 km SSE of ‘Ohonua, Tonga · 1777 days ago · 10 km deep · 8 km away
Before
- 4.280 km S of ‘Ohonua, Tonga · 1838 days ago · 35 km deep · 82 km away
- 4.6181 km SSW of ‘Ohonua, Tonga · 1839 days ago · 10 km deep · 97 km away
- 4.7171 km SSE of ‘Ohonua, Tonga · 1841 days ago · 10 km deep · 26 km away
- 4.3197 km SSE of ‘Ohonua, Tonga · 1851 days ago · 10 km deep · 54 km away
- 5.983 km SSE of ‘Ohonua, Tonga · 1851 days ago · 10 km deep · 64 km away · felt by 3
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000fsa7. Read Wed, Sep 30, 2026, 11:44 PM UTC.