Tonga earthquakes

M5.1 earthquake 173 km NE of Neiafu, Tonga

A magnitude 5.1 earthquake struck 173 km NE of Neiafu, Tonga on Thu, Feb 4, 1982, 11:04 PM GMT-12 (11:04 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.4 145 km NE of Neiafu, Tonga. This one was a foreshock.

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The earthquake

Magnitude
5.1 (ms), moderate
Local time
UTC
1982-02-05 11:04:00 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
17.585° S, 172.779° 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
OPERATOR_ASSIGNED

Nearby

Within 100 km, magnitude 2.1 and up: 1 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 5.4145 km NE of Neiafu, Tonga · 16280 days ago · 33 km deep · 35 km away

Before

  1. 5.2175 km SE of Hihifo, Tonga · 16301 days ago · 33 km deep · 76 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0001jg8 (also filed as iscgem603627). Read Tue, Sep 22, 2026, 6:29 AM UTC.