M5.2 earthquake 99 km E of Neiafu, Tonga
A magnitude 5.2 earthquake struck 99 km E of Neiafu, Tonga on Sun, Aug 29, 2021, 9:50 PM GMT+13 (08:50 UTC), 10 km (6 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.2 (mww), moderate
- Local time
- UTC
- 2021-08-29 08:50:42 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 18.662° S, 173.040° W
- Region
- Tonga
- Felt reports
- 1
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Reverse (thrust)
- Moment magnitude
- 5.2 Mww
- Nodal plane 1
- Strike 40°, dip 42°, rake 105°
- Nodal plane 2
- Strike 201°, dip 50°, rake 77°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 5.7 km horizontally, 1.8 km in depth
- Magnitude uncertainty
- ±0.09
- Depth from
- Operator assigned
- Station coverage gap
- 130°
- Stations used
- 55
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.2 and up: 7 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.633 km ENE of Neiafu, Tonga · 1845 days ago · 32 km deep · 73 km away
- 4.293 km SE of Neiafu, Tonga · 1844 days ago · 10 km deep · 77 km away
- 4.6153 km ESE of Neiafu, Tonga · 1827 days ago · 10 km deep · 62 km away
- 4.799 km ENE of Pangai, Tonga · 1818 days ago · 10 km deep · 98 km away
- 4.5158 km E of Neiafu, Tonga · 1808 days ago · 10 km deep · 59 km away
- 4.6161 km E of Neiafu, Tonga · 1807 days ago · 10 km deep · 66 km away
- 4.2130 km E of Neiafu, Tonga · 1807 days ago · 10 km deep · 33 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000f5ek (also filed as usauto7000f5ek, iscgem621009933). Read Wed, Sep 30, 2026, 11:30 AM UTC.