Tonga earthquakes

M4.8 earthquake 92 km NNW of Hihifo, Tonga

A magnitude 4.8 earthquake struck 92 km NNW of Hihifo, Tonga on Thu, Apr 3, 1986, 2:56 AM GMT-11 (13:56 UTC), 95 km (59 mi) below the surface.

A larger quake followed: M5.3 85 km NE 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
4.8 (mb), light
Local time
UTC
1986-04-03 13:56:22 UTC
Depth
95.1 km (59.1 mi), intermediate-depth
Epicenter
15.178° S, 174.116° 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.

Depth from
CONSTRAINED_BY_DEPTH_PHASES

Nearest places

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

Nearby

Within 100 km, magnitude 1.8 and up: 9 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 4.539 km NW of Hihifo, Tonga · 14779 days ago · 140 km deep · 57 km away
  2. 5.385 km NE of Hihifo, Tonga · 14773 days ago · 33 km deep · 100 km away
  3. 5.799 km NNE of Hihifo, Tonga · 14773 days ago · 33 km deep · 84 km away
  4. 5.5135 km NNW of Hihifo, Tonga · 14770 days ago · 33 km deep · 44 km away
  5. 5.545 km NNW of Hihifo, Tonga · 14770 days ago · 89 km deep · 48 km away
  6. 5.296 km NNE of Hihifo, Tonga · 14764 days ago · 33 km deep · 82 km away
  7. 5.8109 km NW of Hihifo, Tonga · 14754 days ago · 33 km deep · 28 km away
  8. 5.452 km N of Hihifo, Tonga · 14727 days ago · 33 km deep · 44 km away
  9. 4.585 km N of Hihifo, Tonga · 14725 days ago · 33 km deep · 29 km away

Before

  1. 5.0105 km NNE of Hihifo, Tonga · 14804 days ago · 33 km deep · 85 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002smc. Read Tue, Sep 22, 2026, 8:08 AM UTC.