M4.9 earthquake 108 km NE of Hihifo, Tonga
A magnitude 4.9 earthquake struck 108 km NE of Hihifo, Tonga on Sun, Aug 29, 2021, 6:08 AM GMT+13 (17:08 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.8 135 km SW of Gataivai, Samoa. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.9 (mb), light
- Local time
- UTC
- 2021-08-28 17:08:52 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 15.295° S, 173.053° 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, 1.9 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- Operator assigned
- Station coverage gap
- 101°
- Stations used
- 97
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 and up: 14 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.535 km N of Hihifo, Tonga · 1857 days ago · 83 km deep · 89 km away
- 4.692 km NNE of Hihifo, Tonga · 1852 days ago · 10 km deep · 63 km away
- 4.566 km E of Hihifo, Tonga · 1851 days ago · 35 km deep · 65 km away
- 4.7106 km NE of Hihifo, Tonga · 1850 days ago · 10 km deep · 7 km away
- 4.7124 km E of Hihifo, Tonga · 1848 days ago · 10 km deep · 73 km away
- 4.828 km N of Hihifo, Tonga · 1843 days ago · 59 km deep · 94 km away
- 4.995 km N of Hihifo, Tonga · 1842 days ago · 110 km deep · 94 km away · felt by 1
- 5.121 km NNE of Hihifo, Tonga · 1839 days ago · 67 km deep · 89 km away · felt by 3
- 4.3105 km NNE of Hihifo, Tonga · 1833 days ago · 149 km deep · 37 km away
- 4.371 km NE of Hihifo, Tonga · 1830 days ago · 35 km deep · 38 km away
- 4.6136 km NNE of Hihifo, Tonga · 1825 days ago · 10 km deep · 43 km away
- 5.8135 km SW of Gataivai, Samoa · 1824 days ago · 20 km deep · 81 km away · felt by 3
- 4.4129 km SW of Gataivai, Samoa · 1824 days ago · 10 km deep · 67 km away
- 5.481 km NE of Hihifo, Tonga · 1820 days ago · 35 km deep · 28 km away · felt by 4
Before
- 4.568 km N of Hihifo, Tonga · 1866 days ago · 133 km deep · 67 km away
- 4.545 km N of Hihifo, Tonga · 1867 days ago · 67 km deep · 82 km away
- 4.953 km NE of Hihifo, Tonga · 1879 days ago · 78 km deep · 55 km away
- 4.898 km NE of Hihifo, Tonga · 1881 days ago · 10 km deep · 21 km away
- 4.6105 km NNE of Hihifo, Tonga · 1886 days ago · 10 km deep · 48 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000f8wg. Read Wed, Sep 30, 2026, 3:12 PM UTC.