Tonga earthquakes

M4.4 earthquake 82 km ESE of Neiafu, Tonga

A magnitude 4.4 earthquake struck 82 km ESE of Neiafu, Tonga on Mon, Aug 17, 2020, 11:33 PM GMT+13 (10:33 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.9 48 km NE of Pangai, Tonga. This one was a foreshock.

Nuku‘alofa forecastMore in Tonga

Map

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

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The earthquake

Magnitude
4.4 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2020-08-17 10:33:24 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
19.029° S, 173.310° 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 8.1 km horizontally, 1.7 km in depth
Magnitude uncertainty
±0.16
Depth from
Operator assigned
Station coverage gap
78°
Stations used
27

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 4.4101 km ESE of Neiafu, Tonga · 2233 days ago · 10 km deep · 19 km away
  2. 4.459 km NE of Pangai, Tonga · 2192 days ago · 35 km deep · 83 km away
  3. 4.247 km NE of Pangai, Tonga · 2192 days ago · 35 km deep · 93 km away
  4. 4.463 km SSW of Neiafu, Tonga · 2192 days ago · 27 km deep · 92 km away
  5. 4.458 km NNE of Pangai, Tonga · 2192 days ago · 35 km deep · 86 km away
  6. 4.661 km S of Neiafu, Tonga · 2192 days ago · 35 km deep · 77 km away
  7. 4.4Tonga region · 2191 days ago · 10 km deep · 57 km away
  8. 4.948 km NE of Pangai, Tonga · 2188 days ago · 35 km deep · 94 km away · felt by 1
  9. 4.673 km NE of Pangai, Tonga · 2187 days ago · 35 km deep · 66 km away
  10. 4.464 km S of Neiafu, Tonga · 2186 days ago · 35 km deep · 82 km away
  11. 4.863 km NNE of Pangai, Tonga · 2184 days ago · 10 km deep · 98 km away

Before

  1. 4.493 km ENE of Neiafu, Tonga · 2247 days ago · 10 km deep · 66 km away
  2. 5.783 km SE of Neiafu, Tonga · 2255 days ago · 10 km deep · 6 km away · felt by 3

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000bifx. Read Fri, Oct 2, 2026, 12:16 PM UTC.