M4.3 earthquake 141 km WSW of Haveluloto, Tonga
A magnitude 4.3 earthquake struck 141 km WSW of Haveluloto, Tonga on Mon, Aug 9, 2021, 4:58 PM GMT+13 (03:58 UTC), 238 km (148 mi) below the surface.
A larger quake followed: M4.5 223 km W of Haveluloto, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mb), light
- Local time
- UTC
- 2021-08-09 03:58:51 UTC
- Depth
- 237.8 km (147.8 mi), intermediate-depth
- Epicenter
- 21.617° S, 176.480° 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 14.2 km horizontally, 7.6 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- From location
- Station coverage gap
- 152°
- Stations used
- 41
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.5223 km W of Haveluloto, Tonga · 1871 days ago · 385 km deep · 97 km away
- 4.397 km WSW of Haveluloto, Tonga · 1845 days ago · 85 km deep · 49 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000f3i4. Read Tue, Sep 29, 2026, 12:38 AM UTC.