Tonga earthquakes

M4.6 earthquake 94 km SW of Hihifo, Tonga

A magnitude 4.6 earthquake struck 94 km SW of Hihifo, Tonga on Thu, Oct 24, 1985, 7:28 AM GMT-12 (19:28 UTC), 295 km (183 mi) below the surface.

A larger quake followed: M5.1 109 km SSW of Hihifo, Tonga. This one was a foreshock.

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The earthquake

Magnitude
4.6 (mb), light
Local time
UTC
1985-10-24 19:28:20 UTC
Depth
294.6 km (183.1 mi), intermediate-depth
Epicenter
16.540° S, 174.443° 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 1.6 and up: 7 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 5.1109 km SSW of Hihifo, Tonga · 14937 days ago · 33 km deep · 32 km away
  2. 4.195 km SW of Hihifo, Tonga · 14934 days ago · 235 km deep · 8 km away
  3. 4.9148 km SW of Hihifo, Tonga · 14931 days ago · 140 km deep · 59 km away
  4. 4.6113 km S of Hihifo, Tonga · 14930 days ago · 70 km deep · 99 km away
  5. 4.6160 km WSW of Hihifo, Tonga · 14925 days ago · 229 km deep · 75 km away
  6. 6.062 km SW of Hihifo, Tonga · 14906 days ago · 165 km deep · 33 km away
  7. 4.344 km WSW of Hihifo, Tonga · 14895 days ago · 148 km deep · 62 km away

Before

  1. 5.175 km W of Hihifo, Tonga · 14945 days ago · 33 km deep · 74 km away
  2. 4.695 km WNW of Hihifo, Tonga · 14968 days ago · 33 km deep · 99 km away
  3. 4.3120 km W of Hihifo, Tonga · 14972 days ago · 329 km deep · 71 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002m3f. Read Tue, Sep 22, 2026, 7:59 AM UTC.