Tonga earthquakes

M4.5 earthquake Tonga

A magnitude 4.5 earthquake struck in Tonga on Wed, Aug 12, 2020, 3:08 AM GMT+13 (14:08 UTC), 104 km (64 mi) below the surface.

A larger quake followed: M5.6 79 km NNW of Hihifo, Tonga. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.5 (mb), light
Local time
UTC
2020-08-11 14:08:35 UTC
Depth
103.6 km (64.4 mi), intermediate-depth
Epicenter
15.398° S, 173.911° 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.

Location uncertainty
About 9.8 km horizontally, 6.4 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
58°
Stations used
45

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 14 in the 30 days before it.

After

Before

Earthquakes todayTonga earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000bg1f. Read Wed, Sep 30, 2026, 11:43 PM UTC.