Tonga earthquakes

M4.5 earthquake 117 km SSW of Hihifo, Tonga

A magnitude 4.5 earthquake struck 117 km SSW of Hihifo, Tonga on Wed, Apr 20, 2016, 2:22 AM GMT-12 (14:22 UTC), 64 km (40 mi) below the surface.

A larger quake followed: M5.2 105 km SSE of Hihifo, 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
4.5 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2016-04-20 14:22:04 UTC
Depth
64.1 km (39.8 mi), shallow
Epicenter
16.997° S, 174.026° 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 6.0 km horizontally, 8.2 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
77°
Stations used
28

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 4.693 km SSE of Hihifo, Tonga · 3814 days ago · 10 km deep · 75 km away
  2. 4.6143 km NNW of Neiafu, Tonga · 3813 days ago · 103 km deep · 50 km away
  3. 4.4137 km SSW of Hihifo, Tonga · 3808 days ago · 92 km deep · 23 km away · felt by 1
  4. 4.6133 km N of Neiafu, Tonga · 3806 days ago · 61 km deep · 50 km away
  5. 4.3140 km SSW of Hihifo, Tonga · 3802 days ago · 191 km deep · 36 km away
  6. 4.7117 km NNE of Neiafu, Tonga · 3802 days ago · 60 km deep · 73 km away
  7. 4.282 km SSW of Hihifo, Tonga · 3794 days ago · 128 km deep · 39 km away
  8. 4.2111 km SSW of Hihifo, Tonga · 3789 days ago · 222 km deep · 12 km away
  9. 4.4124 km SSE of Hihifo, Tonga · 3783 days ago · 45 km deep · 92 km away
  10. 5.2105 km SSE of Hihifo, Tonga · 3768 days ago · 40 km deep · 54 km away
  11. 4.3150 km NNW of Neiafu, Tonga · 3766 days ago · 90 km deep · 45 km away

Before

  1. 4.6135 km SSW of Hihifo, Tonga · 3821 days ago · 69 km deep · 25 km away
  2. 4.5149 km SSW of Hihifo, Tonga · 3821 days ago · 61 km deep · 41 km away
  3. 4.5149 km NNW of Neiafu, Tonga · 3831 days ago · 132 km deep · 61 km away
  4. 4.3127 km SSW of Hihifo, Tonga · 3833 days ago · 133 km deep · 17 km away
  5. 4.5143 km NNE of Neiafu, Tonga · 3837 days ago · 10 km deep · 64 km away
  6. 4.554 km SSW of Hihifo, Tonga · 3837 days ago · 81 km deep · 67 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us20005k6m. Read Sun, Oct 4, 2026, 3:15 PM UTC.