Tonga earthquakes

M4.2 earthquake 111 km SSW of Hihifo, Tonga

A magnitude 4.2 earthquake struck 111 km SSW of Hihifo, Tonga on Fri, May 20, 2016, 11:07 AM GMT-12 (23:07 UTC), 222 km (138 mi) below the surface.

A larger quake followed: M5.4 110 km NNW of Neiafu, Tonga. This one was a foreshock.

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

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The earthquake

Magnitude
4.2 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2016-05-20 23:07:46 UTC
Depth
222.2 km (138.0 mi), intermediate-depth
Epicenter
16.917° S, 174.108° 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.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 14.4 km horizontally, 6.1 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
154°
Stations used
23

Nearby

Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 5.2105 km SSE of Hihifo, Tonga · 3768 days ago · 40 km deep · 61 km away
  2. 4.3150 km NNW of Neiafu, Tonga · 3766 days ago · 90 km deep · 49 km away
  3. 4.563 km S of Hihifo, Tonga · 3757 days ago · 47 km deep · 60 km away
  4. 4.6115 km SSW of Hihifo, Tonga · 3755 days ago · 91 km deep · 5 km away
  5. 4.7120 km WSW of Hihifo, Tonga · 3738 days ago · 254 km deep · 94 km away
  6. 5.4110 km NNW of Neiafu, Tonga · 3731 days ago · 120 km deep · 85 km away
  7. 4.1160 km NNW of Neiafu, Tonga · 3729 days ago · 256 km deep · 84 km away

Before

  1. 4.282 km SSW of Hihifo, Tonga · 3794 days ago · 128 km deep · 30 km away
  2. 4.439 km WSW of Hihifo, Tonga · 3798 days ago · 139 km deep · 91 km away
  3. 4.7117 km NNE of Neiafu, Tonga · 3802 days ago · 60 km deep · 85 km away
  4. 4.3140 km SSW of Hihifo, Tonga · 3802 days ago · 191 km deep · 33 km away
  5. 4.6133 km N of Neiafu, Tonga · 3806 days ago · 61 km deep · 59 km away
  6. 4.4137 km SSW of Hihifo, Tonga · 3808 days ago · 92 km deep · 26 km away · felt by 1
  7. 4.6143 km NNW of Neiafu, Tonga · 3813 days ago · 103 km deep · 55 km away
  8. 4.693 km SSE of Hihifo, Tonga · 3814 days ago · 10 km deep · 80 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us20005y4x. Read Sun, Oct 4, 2026, 5:33 PM UTC.