M4.6 earthquake 121 km E of ‘Ohonua, Tonga
A magnitude 4.6 earthquake struck 121 km E of ‘Ohonua, Tonga on Wed, Sep 22, 2021, 9:30 PM GMT+13 (08:30 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.3 95 km E 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
- 4.6 (mb), light
- Local time
- UTC
- 2021-09-22 08:30:14 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 21.146° S, 173.798° 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 12.0 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.19
- Depth from
- Operator assigned
- Station coverage gap
- 112°
- Stations used
- 15
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 5 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.893 km E of ‘Ohonua, Tonga · 1833 days ago · 10 km deep · 44 km away
- 4.6154 km ESE of ‘Ohonua, Tonga · 1817 days ago · 10 km deep · 91 km away
- 4.586 km SE of Pangai, Tonga · 1811 days ago · 10 km deep · 99 km away
- 5.395 km E of ‘Ohonua, Tonga · 1789 days ago · 10 km deep · 27 km away · felt by 3
- 4.4149 km SE of Pangai, Tonga · 1775 days ago · 10 km deep · 46 km away
Before
- 4.8121 km ENE of ‘Ohonua, Tonga · 1835 days ago · 10 km deep · 35 km away
- 4.9Tonga · 1836 days ago · 10 km deep · 54 km away
- 5.880 km ENE of ‘Ohonua, Tonga · 1836 days ago · 14 km deep · 52 km away
- 4.3155 km ESE of ‘Ohonua, Tonga · 1853 days ago · 10 km deep · 73 km away
- 4.7151 km ESE of ‘Ohonua, Tonga · 1858 days ago · 16 km deep · 69 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000fevl. Read Wed, Sep 30, 2026, 1:54 PM UTC.