M4.5 earthquake 45 km N of Hihifo, Tonga
A magnitude 4.5 earthquake struck 45 km N of Hihifo, Tonga on Fri, Aug 20, 2021, 5:06 PM GMT+13 (04:06 UTC), 67 km (41 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
- 4.5 (mb), light
- Local time
- UTC
- 2021-08-20 04:06:31 UTC
- Depth
- 66.6 km (41.4 mi), shallow
- Epicenter
- 15.540° S, 173.775° 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 21.3 km horizontally, 14.4 km in depth
- Magnitude uncertainty
- ±0.22
- Depth from
- From location
- Station coverage gap
- 133°
- Stations used
- 12
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 11 in the 30 days before it.
After
- 4.568 km N of Hihifo, Tonga · 1866 days ago · 133 km deep · 24 km away
- 4.6Tonga · 1863 days ago · 69 km deep · 71 km away
- 4.9108 km NE of Hihifo, Tonga · 1859 days ago · 10 km deep · 82 km away
- 4.535 km N of Hihifo, Tonga · 1856 days ago · 83 km deep · 11 km away
- 4.692 km NNE of Hihifo, Tonga · 1851 days ago · 10 km deep · 48 km away
- 4.566 km E of Hihifo, Tonga · 1850 days ago · 35 km deep · 73 km away
- 4.7106 km NE of Hihifo, Tonga · 1849 days ago · 10 km deep · 83 km away
- 4.86 km S of Hihifo, Tonga · 1849 days ago · 82 km deep · 53 km away
- 5.279 km NW of Hihifo, Tonga · 1844 days ago · 187 km deep · 58 km away
- 4.828 km N of Hihifo, Tonga · 1842 days ago · 59 km deep · 18 km away
- 4.995 km N of Hihifo, Tonga · 1842 days ago · 110 km deep · 51 km away · felt by 1
- 5.121 km NNE of Hihifo, Tonga · 1838 days ago · 67 km deep · 27 km away · felt by 3
- 4.3105 km NNE of Hihifo, Tonga · 1833 days ago · 149 km deep · 67 km away
- 4.371 km NE of Hihifo, Tonga · 1830 days ago · 35 km deep · 54 km away
- 4.557 km SE of Hihifo, Tonga · 1829 days ago · 57 km deep · 98 km away
- 4.6136 km NNE of Hihifo, Tonga · 1824 days ago · 10 km deep · 100 km away
- 5.481 km NE of Hihifo, Tonga · 1820 days ago · 35 km deep · 55 km away · felt by 4
- 4.331 km ESE of Hihifo, Tonga · 1810 days ago · 107 km deep · 66 km away
Before
- 4.551 km SE of Hihifo, Tonga · 1878 days ago · 65 km deep · 87 km away
- 4.953 km NE of Hihifo, Tonga · 1878 days ago · 78 km deep · 33 km away
- 4.898 km NE of Hihifo, Tonga · 1880 days ago · 10 km deep · 66 km away
- 4.6105 km NNE of Hihifo, Tonga · 1886 days ago · 10 km deep · 64 km away
- 4.881 km NE of Hihifo, Tonga · 1890 days ago · 32 km deep · 58 km away · felt by 7
- 4.875 km NW of Hihifo, Tonga · 1892 days ago · 175 km deep · 64 km away
- 4.896 km N of Hihifo, Tonga · 1892 days ago · 93 km deep · 52 km away
- 5.085 km N of Hihifo, Tonga · 1893 days ago · 10 km deep · 40 km away
- 4.620 km WSW of Hihifo, Tonga · 1893 days ago · 113 km deep · 56 km away
- 4.570 km N of Hihifo, Tonga · 1894 days ago · 74 km deep · 28 km away
- 4.843 km SSE of Hihifo, Tonga · 1895 days ago · 51 km deep · 89 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000f6ab. Read Wed, Sep 30, 2026, 4:49 AM UTC.