Tonga earthquakes

M6.1 earthquake 113 km NW of Hihifo, Tonga

A magnitude 6.1 earthquake struck 113 km NW of Hihifo, Tonga on Thu, Aug 8, 1985, 7:09 PM GMT-11 (06:09 UTC), 208 km (129 mi) below the surface.

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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
6.1 (mw), strong
Local time
UTC
1985-08-09 06:09:15 UTC
Depth
208.2 km (129.4 mi), intermediate-depth
Epicenter
15.315° S, 174.620° 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 3.1 and up: 5 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 4.6136 km W of Hihifo, Tonga · 15020 days ago · 305 km deep · 93 km away
  2. 4.982 km NNW of Hihifo, Tonga · 14987 days ago · 139 km deep · 50 km away
  3. 4.5104 km WNW of Hihifo, Tonga · 14983 days ago · 300 km deep · 32 km away
  4. 4.3120 km W of Hihifo, Tonga · 14978 days ago · 329 km deep · 91 km away
  5. 4.695 km WNW of Hihifo, Tonga · 14974 days ago · 33 km deep · 39 km away

Before

  1. 4.8110 km NNW of Hihifo, Tonga · 15043 days ago · 33 km deep · 47 km away
  2. 4.7140 km NW of Hihifo, Tonga · 15051 days ago · 278 km deep · 29 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002hhe (also filed as gcmtb080985a, gcmt19850809060920, iscgem517656). Read Mon, Sep 28, 2026, 2:16 PM UTC.