M4.5 earthquake 18 km SSW of Vaini, Tonga
A magnitude 4.5 earthquake struck 18 km SSW of Vaini, Tonga on Sat, Aug 16, 2025, 10:41 PM GMT+13 (09:41 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.6 51 km N of Nuku‘alofa, 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, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2025-08-16 09:41:29 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 21.343° S, 175.253° 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 15.1 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- Operator assigned
- Station coverage gap
- 113°
- Stations used
- 35
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 3 in the 30 days before it.
After
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000qv86. Read Sun, Oct 4, 2026, 4:09 PM UTC.