Tonga earthquakes

M4.3 earthquake 105 km NNE of Hihifo, Tonga

A magnitude 4.3 earthquake struck 105 km NNE of Hihifo, Tonga on Thu, Sep 23, 2021, 9:23 PM GMT+13 (08:23 UTC), 149 km (93 mi) below the surface.

A larger quake followed: M5.8 135 km SW of Gataivai, Samoa. This one was a foreshock.

Apia forecastMore in Tonga

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
4.3 (mb), light
Local time
UTC
2021-09-23 08:23:13 UTC
Depth
149.3 km (92.8 mi), intermediate-depth
Epicenter
15.114° S, 173.340° 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 15.1 km horizontally, 13.6 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
128°
Stations used
15

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 4.371 km NE of Hihifo, Tonga · 1830 days ago · 35 km deep · 50 km away
  2. 4.6136 km NNE of Hihifo, Tonga · 1824 days ago · 10 km deep · 33 km away
  3. 5.8135 km SW of Gataivai, Samoa · 1824 days ago · 20 km deep · 57 km away · felt by 3
  4. 4.4129 km SW of Gataivai, Samoa · 1824 days ago · 10 km deep · 52 km away
  5. 5.481 km NE of Hihifo, Tonga · 1820 days ago · 35 km deep · 35 km away · felt by 4
  6. 4.294 km NE of Hihifo, Tonga · 1792 days ago · 10 km deep · 42 km away
  7. 4.875 km E of Hihifo, Tonga · 1782 days ago · 10 km deep · 94 km away
  8. 4.2115 km NNE of Hihifo, Tonga · 1781 days ago · 10 km deep · 26 km away
  9. 4.385 km NNE of Hihifo, Tonga · 1774 days ago · 35 km deep · 20 km away

Before

  1. 5.121 km NNE of Hihifo, Tonga · 1838 days ago · 67 km deep · 84 km away · felt by 3
  2. 4.995 km N of Hihifo, Tonga · 1842 days ago · 110 km deep · 60 km away · felt by 1
  3. 4.828 km N of Hihifo, Tonga · 1843 days ago · 59 km deep · 83 km away
  4. 4.7106 km NE of Hihifo, Tonga · 1849 days ago · 10 km deep · 43 km away
  5. 4.566 km E of Hihifo, Tonga · 1851 days ago · 35 km deep · 86 km away
  6. 4.692 km NNE of Hihifo, Tonga · 1852 days ago · 10 km deep · 30 km away
  7. 4.535 km N of Hihifo, Tonga · 1857 days ago · 83 km deep · 77 km away
  8. 4.9108 km NE of Hihifo, Tonga · 1859 days ago · 10 km deep · 37 km away

Earthquakes todayTonga earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000ff73. Read Wed, Sep 30, 2026, 12:21 PM UTC.