M4.6 earthquake 154 km ESE of ‘Ohonua, Tonga
A magnitude 4.6 earthquake struck 154 km ESE of ‘Ohonua, Tonga on Sun, Oct 10, 2021, 7:28 AM GMT+13 (18:28 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
- 2021-10-09 18:28:06 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 21.946° S, 173.606° 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 13.3 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.19
- Depth from
- Operator assigned
- Station coverage gap
- 92°
- 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: 3 in the 60 days after this one and 3 in the 30 days before it.
After
- 5.395 km E of ‘Ohonua, Tonga · 1789 days ago · 10 km deep · 90 km away · felt by 3
- 4.3114 km E of ‘Ohonua, Tonga · 1764 days ago · 10 km deep · 90 km away
- 5.3127 km ESE of ‘Ohonua, Tonga · 1760 days ago · 10 km deep · 36 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000fujv. Read Wed, Sep 30, 2026, 5:29 PM UTC.