Tonga earthquakes

M4.1 earthquake 95 km SW of Hihifo, Tonga

A magnitude 4.1 earthquake struck 95 km SW of Hihifo, Tonga on Sat, Nov 2, 1985, 4:59 AM GMT-12 (16:59 UTC), 235 km (146 mi) below the surface.

A larger quake followed: M4.9 148 km SW of Hihifo, Tonga. This one was a foreshock.

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The earthquake

Magnitude
4.1 (mb), light
Local time
UTC
1985-11-02 16:59:22 UTC
Depth
234.8 km (145.9 mi), intermediate-depth
Epicenter
16.593° S, 174.395° 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
FROM_LOCATION

Nearby

Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 4.9148 km SW of Hihifo, Tonga · 14932 days ago · 140 km deep · 55 km away
  2. 4.6113 km S of Hihifo, Tonga · 14930 days ago · 70 km deep · 92 km away
  3. 4.6160 km WSW of Hihifo, Tonga · 14925 days ago · 229 km deep · 80 km away
  4. 6.062 km SW of Hihifo, Tonga · 14907 days ago · 165 km deep · 33 km away
  5. 4.344 km WSW of Hihifo, Tonga · 14895 days ago · 148 km deep · 65 km away
  6. 5.8113 km SSE of Hihifo, Tonga · 14875 days ago · 16 km deep · 99 km away

Before

  1. 5.1109 km SSW of Hihifo, Tonga · 14937 days ago · 33 km deep · 25 km away
  2. 4.694 km SW of Hihifo, Tonga · 14943 days ago · 295 km deep · 8 km away
  3. 5.175 km W of Hihifo, Tonga · 14945 days ago · 33 km deep · 81 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002mdh. Read Tue, Sep 22, 2026, 2:56 PM UTC.