M4.5 earthquake 127 km E of Neiafu, Tonga
A magnitude 4.5 earthquake struck 127 km E of Neiafu, Tonga on Thu, Aug 19, 2021, 6:13 PM GMT+13 (05:13 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.2 99 km E of Neiafu, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb), light
- Local time
- UTC
- 2021-08-19 05:13:13 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 18.691° S, 172.774° 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 10.9 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.13
- Depth from
- Operator assigned
- Station coverage gap
- 97°
- Stations used
- 23
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000f5r8. Read Wed, Sep 30, 2026, 6:27 PM UTC.