M4.6 earthquake 132 km NW of Nuku‘alofa, Tonga
A magnitude 4.6 earthquake struck 132 km NW of Nuku‘alofa, Tonga on Fri, Jul 30, 2021, 3:40 PM GMT+13 (02:40 UTC), 256 km (159 mi) below the surface.
A larger quake followed: M6.0 185 km WNW of Pangai, 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, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2021-07-30 02:40:22 UTC
- Depth
- 255.8 km (159.0 mi), intermediate-depth
- Epicenter
- 20.264° S, 176.063° 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 11.1 km horizontally, 5.7 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- From location
- Station coverage gap
- 76°
- Stations used
- 53
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 0 in the 30 days before it.
After
- 4.2133 km W of Pangai, Tonga · 1857 days ago · 240 km deep · 82 km away
- 4.1140 km NW of Nuku‘alofa, Tonga · 1851 days ago · 489 km deep · 9 km away
- 6.0185 km WNW of Pangai, Tonga · 1851 days ago · 10 km deep · 98 km away · felt by 5
- 5.2132 km NNW of Nuku‘alofa, Tonga · 1839 days ago · 192 km deep · 40 km away
- 4.6156 km NW of Nuku‘alofa, Tonga · 1831 days ago · 10 km deep · 24 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000f0gu. Read Fri, Oct 2, 2026, 6:46 AM UTC.