M4.7 earthquake 124 km E of Hihifo, Tonga
A magnitude 4.7 earthquake struck 124 km E of Hihifo, Tonga on Wed, Sep 8, 2021, 10:42 PM GMT+13 (09:42 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.4 81 km NE of Hihifo, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb), light
- Local time
- UTC
- 2021-09-08 09:42:46 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 15.825° S, 172.646° 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 11.8 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.14
- Depth from
- Operator assigned
- Station coverage gap
- 102°
- Stations used
- 21
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 5 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.371 km NE of Hihifo, Tonga · 1830 days ago · 35 km deep · 73 km away
- 5.481 km NE of Hihifo, Tonga · 1820 days ago · 35 km deep · 81 km away · felt by 4
- 4.331 km ESE of Hihifo, Tonga · 1810 days ago · 107 km deep · 99 km away
- 4.6106 km ESE of Hihifo, Tonga · 1797 days ago · 10 km deep · 43 km away
- 4.294 km NE of Hihifo, Tonga · 1792 days ago · 10 km deep · 67 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000fbfx. Read Wed, Sep 30, 2026, 9:37 AM UTC.