Tonga earthquakes

M4.0 earthquake 121 km NNE of Hihifo, Tonga

A magnitude 4.0 earthquake struck 121 km NNE of Hihifo, Tonga on Thu, Sep 17, 2020, 11:04 AM GMT+13 (22:04 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M6.2 83 km NNE of Hihifo, Tonga. This one was a foreshock.

Apia 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
4.0 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2020-09-16 22:04:20 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
14.927° S, 173.400° 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 14.7 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.21
Depth from
Operator assigned
Station coverage gap
161°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 4.7106 km NNE of Hihifo, Tonga · 2205 days ago · 20 km deep · 15 km away
  2. 4.3108 km NNE of Hihifo, Tonga · 2197 days ago · 10 km deep · 14 km away
  3. 5.193 km NNW of Hihifo, Tonga · 2192 days ago · 10 km deep · 75 km away
  4. 4.6140 km NNE of Hihifo, Tonga · 2190 days ago · 10 km deep · 20 km away
  5. 4.668 km N of Hihifo, Tonga · 2174 days ago · 64 km deep · 58 km away
  6. 5.976 km NNE of Hihifo, Tonga · 2167 days ago · 39 km deep · 49 km away · felt by 9
  7. 4.783 km NE of Hihifo, Tonga · 2167 days ago · 35 km deep · 56 km away
  8. 4.284 km NNW of Hihifo, Tonga · 2163 days ago · 10 km deep · 91 km away
  9. 4.4107 km NNE of Hihifo, Tonga · 2156 days ago · 10 km deep · 17 km away
  10. 6.283 km NNE of Hihifo, Tonga · 2154 days ago · 34 km deep · 38 km away · felt by 13

Before

  1. 4.7109 km NE of Hihifo, Tonga · 2207 days ago · 10 km deep · 63 km away
  2. 5.4123 km NE of Hihifo, Tonga · 2214 days ago · 25 km deep · 53 km away · felt by 2
  3. 4.181 km NE of Hihifo, Tonga · 2216 days ago · 10 km deep · 48 km away
  4. 4.7102 km NNE of Hihifo, Tonga · 2223 days ago · 10 km deep · 19 km away
  5. 5.679 km NNW of Hihifo, Tonga · 2228 days ago · 10 km deep · 84 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000bzln. Read Thu, Oct 1, 2026, 2:36 AM UTC.