M4.7 earthquake 191 km WNW of Hihifo, Tonga
A magnitude 4.7 earthquake struck 191 km WNW of Hihifo, Tonga on Fri, Sep 24, 2021, 8:53 PM GMT-12 (08:53 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.5 164 km S of Mata-Utu, Wallis and Futuna. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2021-09-25 08:53:09 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 15.207° S, 175.405° 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 9.4 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.13
- Depth from
- Operator assigned
- Station coverage gap
- 110°
- Stations used
- 30
Nearby
Within 100 km, magnitude 1.7 and up: 5 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.0124 km W of Hihifo, Tonga · 1810 days ago · 258 km deep · 83 km away
- 4.4198 km S of Mata-Utu, Wallis and Futuna · 1784 days ago · 10 km deep · 72 km away
- 4.3225 km WNW of Hihifo, Tonga · 1784 days ago · 10 km deep · 46 km away
- 5.5164 km S of Mata-Utu, Wallis and Futuna · 1784 days ago · 10 km deep · 89 km away · felt by 4
- 4.3198 km WNW of Hihifo, Tonga · 1784 days ago · 10 km deep · 36 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000fqg5. Read Fri, Oct 2, 2026, 6:27 PM UTC.