M4.2 earthquake 133 km W of Pangai, Tonga
A magnitude 4.2 earthquake struck 133 km W of Pangai, Tonga on Wed, Sep 1, 2021, 6:18 PM GMT+13 (05:18 UTC), 240 km (149 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
- 4.2 (mb), light
- Local time
- UTC
- 2021-09-01 05:18:13 UTC
- Depth
- 240.5 km (149.4 mi), intermediate-depth
- Epicenter
- 19.658° S, 175.616° 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 15.8 km horizontally, 15.5 km in depth
- Magnitude uncertainty
- ±0.15
- Depth from
- From location
- Station coverage gap
- 147°
- Stations used
- 17
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.1140 km NW of Nuku‘alofa, Tonga · 1849 days ago · 489 km deep · 85 km away
- 6.0185 km WNW of Pangai, Tonga · 1849 days ago · 10 km deep · 56 km away · felt by 5
- 5.8223 km WNW of Pangai, Tonga · 1847 days ago · 10 km deep · 94 km away · felt by 1
- 5.2132 km NNW of Nuku‘alofa, Tonga · 1837 days ago · 192 km deep · 47 km away
- 4.6156 km NW of Nuku‘alofa, Tonga · 1828 days ago · 10 km deep · 79 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000f9ph. Read Tue, Sep 29, 2026, 10:24 PM UTC.